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1
Content available Stanowisko dydaktyczne do pomiaru temperatury wybranymi metodami
Kciuk M.
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
|
2018
|
Nr 59
87--90
PL
W pracy przedstawiono stanowisko dydaktyczne służące do pomiaru temperatury z zastosowaniem metod zarówno stykowych jak i bezkontaktowych. Zakres metod stykowych obejmuje pomiary termoelementem, termistorem ale również z zastosowaniem ogniwa Peltiera. Metodą bezstykową jest pomiar termograficzny z zastosowaniem kamery termowizyjnej. Zwiększenie temperatury powyżej temperatury otoczenia zrealizowane zostało przy pomocy ogniwa Peltiera. Przedstawiono przykładowe wyniki pomiarów w postaci charakterystyk temperaturowych oraz ich analizę. Najciekawszym zagadnieniem w pracy jest zastosowanie ogniwa Peltiera do pomiaru temperatury. Jest to zagadnienie praktycznie nie znane studentom.
EN
Temperature is the most often measured physical quantity as in normal life as in industry. So, it is very important to teach students about methods and sensors for temperature measuring. The main goal of this paper is presenting didactic stand for temperature measurement. It enables to measure temperature with contact and contactless methods. General description of measurement is presented as well as example measurement results with discussion. The element which changes temperature is Peltier’s Cell which is supplied by Power Supply. The simple circuit is presented in fig. 2. The Peltier’s Cell is switched between Peltier’s effect and Seebec’s effect using 1-2 switch (see fig. 2). There are two thermocouple sensors: one on the hot size, second on cold one and thermistor on the hot size. The exact installation of the sensors is presented in fig. 1. The IR camera Flir A325 is applied as well for sensorless measurement, the example of thermogram is presented in fig. 5. Figures 4, 6, 7, 8 and 9 present exemplary results for measurements. Fig. 4 presents temperature measurement for hot and cold size using thermocouples and IR camera. Fig. 6 presents thermocouple Seebeck’s voltage vs. temperature. Figs. 7 and 8 presents Peltier’s Cell Seebeck’s voltage and power vs. hot/cold difference of temperatures. Fig 9 presents thermistor resistance vs. temperature. The two electric circuits are presented in Fig. 3 for resistance-voltage conversion, the results for conversion are presented in fig. 10, there are used voltage divider and current mirror. The measurement stand enables to teach students variety methods of temperature measurement classical contact methods using thermocouples and thermistors, contactless method using IR camera and non popular method using Peltier’s Cell. The last possibility is surprising for students. It is used as example of “energy havesting” solution.
2
Content available remote Investigation of mechanical and anti-corrosion properties of flame sprayed coatings
Musztyfaga-Staszuk M., Czupryński A., Kciuk M.
Advances in Materials Science
|
2018
|
Vol. 18, nr 4(58)
42--53
EN
This article presents the results of an examination of the properties of thermal flame sprayed coatings produced by material in the form of four powders (two polymers: PA11 and PA12 CastoPlast, and two high purity: tin and aluminum) on the substrate of the unalloyed structural steel of S235JR grade. Investigations of coating properties are based on metallography tests (SEM and CLSM), measurement of microhardness (acc. to PN-EN ISO 6507-1:2007), anticorrosive (acc. to PN-EN ISO 9227:2017-06) and bend testing. Results demonstrate properties of flame sprayed coatings that are especially promising in the industrial applications where corrosion-resistant coating properties are required. Consequently, performed experiments show that the highest corrosion resistance is demonstrated by steel samples with a polyamide anti-corrosion system. Accelerated corrosion tests showed the lowest corrosion resistance of the tin coating system, however, they do not fully correspond to the corrosion processes in operating conditions.
3
Content available Zastosowanie DMA w układach szeregowej transmisji danych
Sowiński D., Kciuk M.
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
|
2017
|
Nr 54
211--215
PL
W artykule przedstawiono projekt układu wykorzystującego w transmisji danych kontroler DMA. Głównym zadaniem kontrolera jest odciążenie jednostki centralnej użytego mikrokontrolera przez bezpośredni dostęp do jego pamięci. Badanie transmisji przeprowadzono za pomocą analizatora stanów logicznych LOGIC8 wraz z dedykowanym do niego oprogramowaniem producenta. Analiza otrzymanych wyników potwierdza, iż uzyskana szybkość transmisji danych przy zastosowaniu kontrolera DMA jest o 16% większa niż w przypadku klasycznej obsługi procesu komunikacji z zastosowaniem procesora.
EN
In this paper authors proved that DMA controller have positive effect on the serial transmission process. Firstly, was presented a scheme with principles of the device using DMA controller. The stream of data sent from sensor can use one of four modes, it means: without DMA, with DMA on sensor side, with DMA on PC side and with DMA on both sides. The main device was assembled with following modules: LSM9DS0 sensor as a data generator, STM32F4 ARM microcontroller for data transmssion, USART-USB converter and PC computer as a data reader. The main module is the ARM microcontroller which controls whole process. Additionally, authors present used transmission interfaces working between the modules. In research 18 kB of data is send from the sensor to the computer and time of data transmission is measured. There are different structures of data frame in range of 3000 buffers containing 6b of data to 6 buffers containing 3000b. The speed for the SPI and UART amounted to 5.25 Mb/s. The times for the case: 1018 executed delay loops are presented in Table 2 and are given in milliseconds. In result transmission fully controlled by DMA is 16,6% faster than CPU controlled one (pulling mode) and 5,2% faster than CPU utilizing interrupts. Transmission controlled by CPU utilizing interrupts is 12,1% faster than CPU controlled one (in pulling mode). The fastest transmission achieved 60% of theoretical transmission speed.
4
Content available Corrosion Resistance of X5CrNi18-10 Stainless Steel
Kciuk M., Lasok S.
Archives of Metallurgy and Materials
|
2017
|
Vol. 62, iss. 4
2101--2106
EN
The paper presents the influence of heat treatment on the structure and corrosion resistance of X5CrNi18-10 steel. To determine the structure which has been obtained after heat treatment the methods of light and scanning electron microscopy with EDS microanalysis were used. The electrochemical corrosion properties of the investigated steel were studied in 3.5% NaCl solution using potentiodynamic polarization tests. Basing on the registered curves, the corrosion current, polarization resistance and corrosion potential were determined. The corrosion tests were followed by fractographic researches.
5
Content available Zastosowanie algorytmu genetycznego w celu wyznaczenia współczynników wzmocnienia wzmacniacza wejściowego rejestratora sygnałów
Kciuk M., Bartel S.
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
|
2016
|
Nr 49
53--56
PL
W artykule przedstawiono projekt wzmacniacza nieodwracającego o zmiennym współczynniku wzmocnienia dla modułu pięciozakresowego miernika napięcia. Zadaniem wzmacniacza jest dopasowanie zakresu wejściowego urządzenia do wejścia przetwornika analogowo-cyfrowego. Przełączenie zakresu (wzmocnienia) odbywa się poprzez wybór odpowiedniej pary rezystorów odpowiedzialnych za wzmocnienie i podzielenie sygnału. Zestaw rezystorów przełączanych został dobrany za pomocą algorytmu genetycznego zaimplementowanego jako aplikacja napisana w środowisku LabVIEW. Program poszukuje rozwiązania w zadanej puli rezystorów zwanej populacją, poszukując wartości spełniające wszystkie zadane wzmocnienia sygnału.
EN
Goal of the paper is to find proper resisnace values for input amplifier of voltage measurement module – see fig. 2. The voltage measurement module is a part of a bigger device which is a signal logger presented in fig. 1. The structure of the amplifier is presented in fig. 3. A pairs of resistors set the amplifier gains, the gain factor is given by equation (1). One resistor from RA group (which contains R1-R3) and one resistor from RB group (which contains R4-R6) set the gain factor. The variable gain convertes signal from choosen input of the module into ADC converter input. The module need five measurement ranges which have to be converted into ADC input, so five gain factors are needed. The genetic algorithm was employed to find the resistance values. Group of six resistors called genes buid chromosome – fig. 4. The matching function compares nine gains given by pairs of resistors with five desirable gains, each mached gain increases matching factor, expected factor is equal to five. The maching function is presented in fig. 6. The software was implemented in LabVIEW environment. The code is presented in fig. 7, as well as GUI is presented in fig. 8. The software finds the solution in given range of resistor values. In result it try to find all five signal gains. Two series of resistances were taken into account, the first one is E96 (1%) serie with 318 elements, the second one was series available in local electronic shop with 72 elements. The solutions were found in both cases. The results are presented in fig. 9.
6
Content available Moduł rejestracji warunków środowiskowych dla stanowiska pomiarowego
Kciuk M., Mrógała M.
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
|
2016
|
Nr 49
57--62
PL
W artykule przedstawiono projekt i wykonanie modułu rejestrującego warunki środowiskowe w pomieszczeniu laboratoryjnym. Układ został zaprojektowany do współpracy ze stanowiskiem pomiarowym wyznaczającym charakterystyki elektromechaniczne elektrycznie aktywowanych aktuatorów SMA. Współpracuje ze stanowiskiem laboratoryjnym komunikując się w strukturze pytanie – odpowiedź. Urządzenie rozszerza zakres prowadzonych badań umożliwiając automatyczną rejestrację temperatury, wilgotności oraz ciśnienia atmosferycznego w trakcie pomiarów. Zmiana temperatury otoczenia w trakcie długotrwałych pomiarów wprowadza dodatkowe błędy pomiarowe, które do tej pory nie mogły być uwzględnione, pozostałe parametry ciśnienie i wilgotność mogą mieć wpływ na warunki oddawania ciepła od aktuatora do otoczenia. Komunikacja z zastosowaniem standardu USB i wirtualnego portu COM zapewnia uniwersalność urządzenia. Praca została zrealizowana jako projekt inżynierski.
EN
The article presents ambient environment acquisition module. The module acquires temperature humidity and pressure in the laboratory room. The task was done as a BsC Thesis. The module must be universal module, which develop abilities of measurement system. The module was designed as a addiction for Shape Memory Alloy Actuators measurement systems. The SMA actuators are driven by current, so ambient temperature is a starting point for increasing SMA internal temperature causes by flowing current. The module exchanges data with measurement system in question-answer structure. Virtual COM port emulated on USB enables to use the module in wide range of measurement systems.
7
Content available remote Contactless displacement converter with switching measurement range
Kciuk M., Trawiński T.
Prace Naukowe Politechniki Śląskiej. Elektryka
|
2016
|
z. 3-4
65--71
EN
The main goal of this article is to show the method for automatic change of measuring range of designed displacement-to-voltage converter. The designed displacement-to-voltage converter is used in fully automated test bench for investigation of SMA material properties. The entire designed system makes possible measurements of electro-thermo-mechanical characteristics. The main control components were implemented in LabVIEW program.
PL
W artykule przedstawiono rozszerzenie możliwości pomiarowych przetwornika „odkształcenie-napięcie” działającego w złożonym systemie pomiarowym służącym do pomiaru właściwości cięgien wykonanych ze stopu SMA. Liniowa charakterystyka przetwarzania umożliwiła takie oprogramowanie komputera sterującego systemem pomiarowym, oprogramowanego w LabVIEW, aby w przypadku przekroczenia zakresu pomiarowego nastąpiło automatyczne przełączenie zakresu. Zmiana zakresu pomiarowego związana jest z przesunięciem charakterystyki przetwarzania poprzez zmianę wyrazu wolnego liniowej funkcji przetwarzania. W artykule zaprezentowano koncepcję automatycznego przełączania zakresu, sprawdzono realizowalność zadania dla danego przetwornika, przeanalizowano błędy pomiarowe wynikające ze zmiany skali, przedstawiono algorytm działania oraz realizację w programie LabVIEW.
8
Content available Investigations of the Shape Memory Alloy actuator applied in a current sensitive switch
Kciuk M., Kłapyta G., Świątek K.
Measurement Automation Monitoring
|
2016
|
Vol. 62, No. 7
221--226
EN
The main goal of this paper is to present results of investigations of the Shape Memory Alloy (SMA) actuator applied in a current sensitive switch. The SMA muscle wire actuates the electric micro switch, breaking the electrical circuit. The prototype stand of the switch, automatically breaking the circuit when overcurrent appears, was designed. The stand consists of a prototype switch construction and a measuring system, allowing for various investigations. The measurement methodology and selected results of the performed experiments are also presented. Finally, the authors try to answer the following question: is it possible to use the SMA actuator as a main drive in a current sensing switch?
9
Content available remote Zastosowanie stanowiska laboratoryjnego do badania magistrali CAN
Makowski T., Kciuk M.
Szybkobieżne Pojazdy Gąsienicowe
|
2015
|
nr 2 (37)
93--100
PL
W artykule przedstawiono analizę stabilności magistrali CAN przy zastosowaniu warunków technicznych niezgodnych z zaleceniami normalizacyjnymi oraz w stanach zakłóceniowych i zwarciowych. Badania przeprowadzono na autorskim stanowisku laboratoryjnym z modułem przeznaczonym do badania magistrali CAN.
EN
The article presents an analysis of the stability of the CAN bus using the technical specifications inconsistent with the recommendations of the standards and conditions of disruption and short-circuit. The study was conducted on a author development kit with designed module for CAN bus testing.
10
Content available remote Zaawansowane urządzenia i systemy mechatroniczne
Kowol P., Kłapyta G., Trawiński T., Kielan P., Szczygieł M., Kciuk M., Pilch Z.
Prace Naukowe Politechniki Śląskiej. Elektryka
|
2015
|
z. 2
85--100
PL
Artykuł przedstawia syntetyczny opis wybranych prac z zakresu projektowania i budowy zaawansowanych urządzeń i systemów mechatronicznych, realizowanych w Katedrze Mechatroniki Wydziału Elektrycznego Politechniki Śląskiej w Gliwicach. Prace były realizowane w latach 2005-2015.
EN
The paper presents short descriptions of chosen mechatronic projects realized at the Department of Mechatronics at the Faculty of Electrical Engineering of Silesian University of Technology in Gliwice. The projects were carried out in the years 2005-2015.
11
Content available System pomiarowy typu Master-Slave z bezprzewodowymi układami akwizycji danych typu Smart Sensor o wejściu napięciowym
Szweda D., Kciuk M.
Pomiary Automatyka Kontrola
|
2014
|
R. 60, nr 11
1029--1032
PL
Artykuł przedstawia bezprzewodowy system pomiarowy, złożony z kart akwizycji danych o wejściu napięciowym, opracowany na potrzeby pracy magisterskiej. Zadaniem systemu jest akwizycja, archiwizacja, monitorowanie oraz przesyłanie danych pomiarowych z urządzenia Slave do Master. Urządzenia akwizycyjne zostały wykonane jako urządzenia typu SMART SENSOR. Opracowany system pomiarowy został zastosowany do akwizycji danych w systemie odzyskiwania energii z otwieranych i zamykanych drzwi.
EN
This paper presents wireless measurement system, consist of a data acquisition cards with voltage inputs, developed as the MSc thesis. The purpose of the system is acquisition, archiving, monitoring and transfer measurement data from the slave device to the master device (Fig. 1). Acquisition cards has been made as a SMART SENSOR device (Fig. 2). Data acquisition card is a slave module in the measurement system. It allows to acquire the measurement data with maximum 8 inputs with adjustable delay time between the measurements. The data can be saved to a SD card, and sent by radio in the ISM band (Fig. 3). DAQ card configuration is done by a terminal application located on PC (Fig. 4). The network gateway consists of a manager, a user interface module (Fig. 5), the power module and converter UART / USB. Developed measurement system has been used as the data acquisition system in recover energy from opening and closing door circuit. The short measurement series were done for acquiring voltage (Fig. 6) and current (Fig. 7) when movement of the door was forced. Long acquisition series were done as well (Fig. 8). The long series took four days during typical office use. The measurement system can be used for monitoring various types of physical quantities by means of appropriate sensors and output voltage. Applied Gateway may be part of the monitoring and control of data acquisition DAQ cards used in the measurements.
12
Content available Koncepcja, projekt i wykonanie systemu automatyki budynkowej wykorzystującego sieci Internet i GSM
Czura K., Kciuk M.
Pomiary Automatyka Kontrola
|
2014
|
R. 60, nr 3
179--182
PL
System automatyki budynkowej wykorzystujący sieci Internet i GSM zaprojektowano i wykonano w ramach pracy magisterskiej. Głównym założeniem projektu była realizacja postawionego zadania jako rozszerzenie możliwości popularnego urządzenia sieciowego – routera TP-Link WR1043nd. W celu zdalnej komunikacji i sterowania urządzeniami podłączonymi do systemu, wykorzystano sieci Internet i GSM. W ramach pracy napisano oprogramowanie umożliwiające sterowanie urządzeniami podłączonymi do systemu i bazujące na systemie OpenWrt.
EN
Design and construction of a control system for the building automation system was the object of the study. In the project there were made remote communication and control devices connected to the system by the Internet and GSM networks. The main control unit of the control system is a typical network device TP-Link WR1043ND. The structure of the automation system is shown in Fig. 1. The operating software written in Bash [6] controls the automation system. Nominal TP-Link firmware was updated by OpenWRT Linux based firmware. The system was equipped with an operating panel in the form of a website (Fig. 3). The relay board was used to communicate with actuators and sensors applied in the system. The presented system also enables communication with 1-Wire sensors by use of the converter. The system was integrated with a weather station WS10180 as well. The system devices can be controlled in real time by the operator panel or SMS commands. Additionally, the system enables the running of devices according to the established schedules (Fig. 5). The measurement data of weather conditions can be used to control building automation. The completed software allows connection a USB camera and realization of mini-monitoring with the detection function and motion acquisition in the form of images. The project uses the soundcard-which enables the function alerts and information about events in the system. By using a router as a central unit, the automation system will be more versatile and can be used in most households, and other buildings. An additional advantage of the system is the low cost and easy availability to purchase components necessary for its imple-mentation.
13
Content available remote The influence of chemical composition on structure and mechanical properties of austenitic Cr-Ni steels
Kurc-Lisiecka A., Kciuk M.
Journal of Achievements in Materials and Manufacturing Engineering
|
2013
|
Vol. 61, nr 2
210--215
EN
Purpose: The aim of the paper is to investigated the influence of the chemical composition on the structure and mechanical properties of austenitic Cr-Ni steels. Special attention was put on the effect of solution heat treatment on mechanical properties of examined steels. Design/methodology/approach: The examinations of static tensile tests were conducted on ZWICK 100N5A. Hardness measurements were made by Vickers method. The X-ray analyzes were realized with the use of Dron 2.0 diffractometer equipped with the lamp of the cobalt anode. The metallographic observations were carried out on LEICA MEF 4A light microscope. Findings: Results shown that after solution heat treatment the values of strength properties (UTS, YS0.2) and hardness (HV) of both investigated steels decrease and their elongation (EL) increases. The X5CrNi18-8 steel in delivery state shown austenitic microstructure with twins and numerous non-metallic inclusions, while in steel X10CrNi18-8 revealed a austenitic microstructure with numerous slip bands in areas with deformation martensite α’. The examined steels after solution heat treatment followed by water-cooling has the structure of austenite. Research limitations/implications: To investigate in more detail the influence of chemical composition on structure and mechanical properties the examinations of substructure by TEM should be conducted. Originality/value: The relationship between the solution heat treatment, structure and mechanical properties of investigated steels was specified.
14
Generator sygnałów dla karty akwizycji danych DAQ
Kciuk M., Bukowski J.
Elektronika : konstrukcje, technologie, zastosowania
|
2013
|
Vol. 54, nr 9
128-131
PL
Celem pracy było zaprojektowanie układu elektronicznego współpracującego z wielofunkcyjną kartą akwizycji danych DAQ. Założeniem projektu było rozszerzenie możliwości dydaktycznych laboratorium komputerowych systemów pomiarowych. W ramach pracy zaprojektowano układ generatora sygnałów okresowo zmiennych typu unipolarnego, generator sygnałów różnicowych oraz układy sterowania serwonapędami modelarskimi oraz napędami prądu stałego.
EN
The aim of this study was to design an electronic circuit cooperating with multifunction data acquisition card DAQ. Assumption the project was to extend the capabilities of educational laboratory of measurement systems. The cyclic signal generators with single and differential signal were designed, control systems for servo drives and DC motors were designed as well.
15
Robot kołowy do zadań inspekcyjnych zdalnie sterowany przez Internet
Czura K., Kciuk M.
Wiadomości Elektrotechniczne
|
2012
|
R. 80, nr 9
56-58
PL
Przedstawiono budowę i zakres działania robota kołowego zdalnie sterowanego przez Internet.
EN
The paper presents design and the scope of operation of wheeled robot remotely controlled through Internet.
16
Content available remote The influence of heat treatment on structure, mechanical properties and corrosion resistance of steel X10CrNi18-8
Kciuk M., Kurc-Lisiecka A.
Archives of Materials Science and Engineering
|
2012
|
Vol. 55, nr 2
62-69
EN
Purpose: The aim of the paper is to investigate the influence of the heat treatment on the structure, mechanical properties and corrosion resistance of the steel X10CrNi18-8. Design/methodology/approach: The investigated steel was solution heat treated at temperature 1050°C with water cooling and it was analysed the susceptibility to intergranular corrosion at temperature 700°C. Structures were investigated using light microscopy. The examinations of the mechanical properties were conducted on ZWICK 100N5A. Hardness measurements were made by Vickers method r. The investigations of the precipitation process were done by X-ray diffraction phase analysis. Corrosion resistance of investigated steel was examined using potentiodynamic methods. Findings: The structure of analysed steel in as-cast conditions consist of austenitic microstructure with numerous slip bands in areas with deformation martensite ?'. The examined steel after solution heat treatment followed by water-cooling has the structure of austenite with a small amount slip bands.Ageing at 700°C caused precipitation of many chromium carbides on the grain boundaries and inside the grain. The best mechanical properties (UTS=1327 MPa, YS0.2=1287 MPa, 392 HV) has steel as-cast conditions. It was also found that the investigated steel show poor corrosion resistance in 3.5% NaCl solution. Fractographic analyses of the samples after corrosion tests permitted to define the kind and degree of corrosion damage. Research limitations/implications: To investigate in more detail the corrosion behaviour 18-8 austenitic steels, the investigations should include immersion tests and an analysis of corrosion products. Practical implications: The obtained results can be used for searching the appropriate way of improving the corrosion resistance of a special group of steels. Originality/value: The relationship between the heat treatment, structure, mechanical properties and corrosion resistance of X10CrNi18-8 steel was specified.
17
Content available Experimental measurements of shape memory alloys wires
Kłapyta G., Kciuk M.
Archives of Electrical Engineering
|
2012
|
Vol. 61, nr 2
129-138
EN
Paper deals with examinations of properties of shape memory alloy actuators. Authors describe design of own laboratory stand for obtaining electro-thermo-mechanical characteristics of SMA wires (maximum length 900 mm). The stand allows for semi-automatic measurements of voltage and current (supplying the actuator), temperature of wire and its extension. Data acquisition and control signals are realized by PC computer. All elements of the measuring system are connected by GPIB network (IEEE 488.2 standard). Control program for static measurements was written in G language (LabVIEW environment). Temperature is measured using infrared camera Flir A325. Displacement measurement system contains optical sensor (converting piston movement into series of pulses), pulses counter, PWM signal generator (PWM signal fulfillment is proportional to number of pulses), lowpass filter and buffer conditioning external signal. For dynamic measurements data recording is performed using digital oscilloscope Tektronix MSO 2024 equipped with four separated channels and digital filter. Wide range of examinations of several SMA wires allowed for drawing its exploitative characteristic helpful for practical use. It shows length change of actuator as a function of mechanical load (Fig. 10). Finally some example static as well as dynamic characteristics are presented and short discussion is carried out.
18
Content available remote Structure and corrosion resistance of aluminium AlMg2.5; AlMg5Mn and AlZn5Mg1 alloys
Kciuk M., Kurc A., Szewczenko J.
Journal of Achievements in Materials and Manufacturing Engineering
|
2010
|
Vol. 41, nr 1-2
74-81
EN
Purpose: The aim of the work was the evaluation of corrosion resistance and structure of aluminium AlMg2.5; AlMg5Mn and AlZn5Mg1 alloys. Design/methodology/approach: The corrosion resistance tests of investigated alloys were carried out by means of potentiodynamic method registering anodic polarization curves in 3.5% NaCl solution at room temperature. Registering anodic polarization curves was conducted at the potential rate equal to 1mV/s. As the reference electrode was used saturated calomel electrode (SCE) and the auxiliary electrode was platinum electrode. Mechanical properties were evaluated on the basis of Vickers hardness test. The test was realized with the use of Hauser hardness tester. The observations of the surface morphology after corrosive tests were carried out using Digital Scanning Electron Microscope DSM 940 OPTON. Findings: The investigations of corrosion resistance of examined aluminium alloys shows that the highest corrosion resistance in 3.5% NaCl solution was observed for AlZn5Mg1 aluminium alloy. Practical implications: The obtained results can be used for searching the appropriate way of improving the corrosion resistance of analysed alloys because better corrosion resistance, lightweight of aluminium and its alloys makes them as most attractive for the steel replacement in shipbuilding. Originality/value: The corrosion behaviour in chloride solution of AlMg2.5; AlMg5Mn and AlZn5Mg1 alloys was investigated.
19
Content available remote Influence of cold rolling on the corrosion resistance of austenitic steel
Kurc A., Kciuk M., Basiaga M.
Journal of Achievements in Materials and Manufacturing Engineering
|
2010
|
Vol. 38, nr 2
154-162
EN
Purpose: The paper analyzes the effects of plastic deformation in cold working process on the corrosion resistance, micro-hardness and mechanical properties of austenitic stainless steel X5CrNi18-10. Design/methodology/approach: Corrosion resistance of X5CrNi18-10 steel was examined using weight and potentiodynamic methods. In the weight method, the specimens were immersed in the prepared solution for 87 days. The evaluation of the corrosion behaviour of investigated steel in the potentiodynamic method was realized by registering of anodic polarization curves. The VoltaLabŽ PGP 201 system for electrochemical tests was applied. The tests were carried out at room temperature in electrolyte simulating artificial sea water (3.5% NaCl). Registering of anodic polarization curves was conducted at the potential rate equal to 1 mV/s. As the reference electrode the saturated calomel electrode (SCE) was applied, the auxiliary electrode was platinum electrode. Mechanical properties were evaluated on the basis of the static tensile and Vickers micro-hardness test. The observations of the surface morphology after corrosive tests were carried out using Scanning Electron Microscope SUPRA™25. Findings: According to the results of potentiodynamic analyses it was found that plastic deformation in a cold working of austenitic steel grade X5CrNi18-10 affected to lower its corrosion resistance in 3.5% NaCl solution, what has an essential meaning in industrial applications of this group of materials. Research limitations/implications: The microscope observations of the surface samples subjected to corrosion resistance test in 3.5% NaCl solution permitted to evaluate types and the rate of corrosion damages. Practical implications: The obtained results can be used for searching the appropriate way of improving the corrosion resistance of a special group of steels. Originality/value: The corrosion behaviour in chloride solution of a Cr-Ni austenitic stainless steel was investigated.
20
Content available remote Experimental and numerical studies of MR damper with prototype magnetorheological fluid
Kciuk S., Turczyn R., Kciuk M.
Journal of Achievements in Materials and Manufacturing Engineering
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2010
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Vol. 39, nr 1
52-59
EN
Purpose: Results of experimental studies of a prototype magnetorheological damper at various magnitudes of control current as well as the manner of modelling electromagnetic phenomena occurring in the damper are presented in this paper. Design/methodology/approach: Model MR fluid was prepared using silicone oil OKS 1050 mixed with carbonyl iron powder CI. Furthermore, to reduce sedimentation, as stabilizers was added Aerosil 200. The observations of the surface morphology of carbonyl iron and fumed silica were carried out using Digital Scanning Electron Microscope SUPRATM25 ZEISS. The effect of magnetic field on magnetorheological fluid is modelled by the finite element method. Findings: The presented model meets the initial criteria, which gives ground to the assumption about its usability for determining the dynamics properties of mechanical systems, employing the finite element method using ANSYS software. Research limitations/implications: The elaborated model can be use for modelling the semi active car suspension dynamics. Originality/value: The actual-non-linear characteristics of magnetisation identified experimentally were used as the values of relative magnetic permeability of the piston housing material. The possibility of application, e.g. real characteristics of material magnetisation and faster and faster calculation machines make possibility the creation of more precise models and more adequate ones to reality.
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