PL
 |
EN
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 28

Liczba wyników na stronie
first rewind previous Strona / 2 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  ATD
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 2 next fast forward last
1
Content available Effect of Shortened Heat Treatment on the Hardness and Microstructure of 320.0 Aluminium Alloy
100%
Pezda J.
Archives of Foundry Engineering
|
2014
|
tom Vol. 14, iss. 2
27--30
EN
Improvement of Al-Si alloys properties in scope of classic method is connected with change of Si precipitations morphology through: using modification of the alloy, maintaining suitable temperature of overheating and pouring process, as well as perfection of heat treatment methods. Growing requirements of the market make it necessary to search after such procedures, which would quickly deliver positive results with simultaneous consideration of economic aspects. Presented in the paper shortened heat treatment with soaking of the alloy at temperature near temperature of solidus could be assumed as the method in the above mentioned understanding of the problem. Such treatment consists in soaking of the alloy to temperature of solutioning, keeping in such temperature, and next, quick quenching in water (20°C) followed by artificial ageing. Temperature ranges of solutioning and ageing treatments implemented in the adopted testing plan were based on analysis of recorded curves from the ATD method. Obtained results relate to dependencies and spatial diagrams describing effect of parameters of the solutioning and ageing treatments on HB hardness of the investigated alloy and change of its microstructure. Performed shortened heat treatment results in precipitation hardening of the investigated 320.0 alloy, what according to expectations produces increased hardness of the material.
2
Content available T6 Heat Treatment of Hypo-eutectic Silumins in Aspect of Improvement of Rm Tensile Strength
100%
Pezda J.
Archives of Foundry Engineering
|
2012
|
tom Vol. 12, iss. 2s
49--52
EN
Improvement of properties of silumins in scope of classic methods is connected with changes in morphology of silicon precipitation through: process of modification of alloy, maintaining a suitable temperature of overheating and pouring into moulds, as well as perfection of heat treatment processes. Obtained structure of casting have a direct influence on mechanical and technological properties of machinery parts, and therefore, usage of knowledge on crystallization to control of crystallization’s kinetics of castings in order to optimize obtained structure and introduction of modern methods of heat treatment, enabling considerable improvement of mechanical and technological properties, becomes an important factor. Dispersion hardening with soaking of alloy near temperature of solidus, consisting in heating of poured specimens to temperature of solutioning, keeping in such temperature, cooling down in cold water (20oC), and next operation of artificial ageing have effect on change of tensile strength Rm of a selected hypo-eutectoid silumins. Selection of suitable parameters of dispersion hardening is condition of obtainment of positive results in terms of improvement of tensile strength Rm and has effect on its economic aspects.
3
Content available Heat Treatment of a Casting Element of a Through Clamp to Suspension of Electric Cables on Line Post Insulators
100%
Pezda J.
Archives of Foundry Engineering
|
2016
|
tom Vol. 16, iss. 3
89--94
EN
Heat treatment of a casting elements poured from silumins belongs to technological processes aimed mainly at change of their mechanical properties in solid state, inducing predetermined structural changes, which are based on precipitation processes (structural strengthening of the material), being a derivative of temperature and duration of solutioning and ageing operations. The subject-matter of this paper is the issue concerning implementation of a heat treatment process, basing on selection of dispersion hardening parameters to assure improvement of technological quality in terms of mechanical properties of a clamping element of energy network suspension, poured from hypoeutectic silumin of the LM25 brand; performed on the basis of experimental research program with use of the ATD method, serving to determination of temperature range of solutioning and ageing treatments. The heat treatment performed in laboratory conditions on a component of energy network suspension has enabled increase of the tensile strength Rm and the hardness HB with about 60-70% comparing to the casting without the heat treatment, when the casting was solutioned at temperature 520 oC for 1 hour and aged at temperature 165 oC during 3 hours.
4
Content available Experimental and Numerical Comparison of Lead-Free and Lead-Containing Brasses for Fixture Application
100%
Radzioch G. , Bartocha D. , Kondracki M.
Archives of Foundry Engineering
|
2023
|
tom Vol. 23, iss. 3
124--132
EN
A comparative analysis of brasses alloys, namely lead-free CuZn (CB771) and lead containing CuZn (CB770), was conducted in this article. The results of the comparative analysis and experimental investigations aimed to provide comprehensive knowledge about the thermophysical properties and solidification characteristics of these alloys. Thermodynamic simulations using Thermo-Calc software and modifications in the chemical composition of the CB771 alloy were employed to approximate its characteristics to those of the lead containing CuZn alloy. Thermal-derivative analysis of the alloys and a technological trial were carried out to determine their solidification characteristics, fluidity, and reproducibility. The casting trials were conducted under identical conditions, and the results were compared for a comprehensive analysis. Additionally, a solidification process simulation was performed using MagmaSoft software to match the thermophysical properties. The aim of this research was to achieve maximum consistency between the simulation results and experimental investigations.
5
Content available remote Influence of vibrations during crystallization on mechanical properties and porosity of AlSi13Cu2 alloy
100%
Ciućka T.
Archives of Foundry Engineering
|
2010
|
tom Vol. 10, iss. 1 spec.
127--130
EN
Today’s industry aims at such situation, where number of defective products, so called defects shall approach to zero. Therefore, one introduces a various changes in technology of production, introduces improvements which would help in accomplishment of this objective. Another important factor is introduction of different type of testing, which shall help in assessment which factor has significant effect on quantity of rejects, and which one could be neglected. Existence of casting rejects is unavoidable; therefore a new ideas, technologies and innovations are necessary in the entire widely understood foundry branch, in order to minimize such adverse effect. Performance of tests aimed at unequivocal determination of an effect of vibrations during crystallization on mechanical properties and porosity of the AlSi13Cu2 alloy was the objective of the present work. To do this, there were produced 36 castings from AlSi13Cu2 alloy. All the castings underwent machining operations. Half of the casting was destined to strength tests, the other half served to determination of an effect of vibrations on porosity of the alloy. The specimens were divided into 12 groups, depending on amplitude of vibrations and tilt angle of metal mould during pouring operation.
6
Content available remote Influence of solidification rate on microstructure of gravity cast AZ91 magnesium alloy
85%
Barszczyńska-Malik K. N. , Zyska A.
Archives of Foundry Engineering
|
2010
|
tom Vol. 10, iss. 1
23-26
EN
Derivative thermal (ATD) and microstructure analyses of gravity cast AZ91 magnesium alloy are presented. The alloy was cast into cold steel and sand moulds with the same dimensions. ATD curves - solidification curves and their first derivative - are presented. The investigated alloy exhibited a strong alloying elements segregation and the presence of [alpha] solid solution and [alpha+gamma] (Mg17Al12) eutectic mixture. Discontinuous precipitates of [gamma] phase were also observed in the microstructure of AZ91 cast into sand mould.
7
Content available Influence of Vibrations During Crystallization on Mechanical Properties and Porosity of EN AC-AlSi17 Alloy
85%
Ciućka T.
|
8
Content available remote Rejestracja procesu krystalizacji odlewniczego stopu AlSi20CuNi AK20 metodą „ATND”
85%
Ciućka T.
Archiwum Odlewnictwa
|
2005
|
tom R. 5, nr 17
45--50
PL
W artykule przedstawiono przykład zastosowania nowej metody ATND do badań krystalizacji stopów metali nieżelaznych. Badania prowadzone były na odlewniczym stopie aluminium AlSi20CuNi.
EN
New ATND technique used to evaluate the phase composition in AlSi20CuNi alloy was presented. The characteristic points were obtained from solidification curves and from milivoltage curves as well as from their derivatives of solidification and crystallization curves with ATND method.
9
Content available ATD and DSC Analysis of IN-713C and ZhS6U-VI Superalloys
85%
Gradoń P. , Binczyk F. , Cwajna J.
|
|
nr 1
10
Content available remote Problem eliminacji ołowiu z mosiądzów armaturowych
85%
Kondracki M.
Eksploatacja i Niezawodność
|
2004
|
tom nr 2
28-31
PL
W artykule zaprezentowano początkowy etap badań nad wyeliminowaniem ołowiu z mosiądzów armaturowych oraz synergiczny wpływ niektórych pierwiastków na strukturą i własności tych stopów. Przedstawiono porównanie własności technologicznych mosiądzów ołowiowych oraz bezołowiowych, w których dodatek ołowiu zastąpiono przez bizmut.
EN
This paper describes early stages of studies on lead elimination from fixture brasses and synergic influence of some alloy addition on properties and structure of these alloys. Author showed technological properties comparison for leaded and non-leaded brasses in which lead was replaced with bismuth.
11
Content available The influence of impurities in feed ingots on the quality of castings made from nickel superalloy IN-713C
80%
Binczyk F. , Cwajna J. , Sozańska M. , Gradoń P.
Archives of Foundry Engineering
|
2013
|
tom Vol. 13, iss. 4
5--8
EN
The paper presents the results of research on the impact of impurities in the feed ingots (master heat) on the precipitation of impurities in the ATD thermal analysis probe castings. This impurities occur mostly inside shrinkage cavities and in interdendritic space. Additionally, insufficient filtration of liquid alloy during pouring promotes the transfer of impurities into the casting. The technology of melting superalloys in vacuum furnace prevents the removal of slag from the surface of molten metal. Because of that, the effective method of quality assessment of feed ingots in order to evaluate the existence of impurities is needed. The effectiveness of ATD analysis in evaluation of purity of feed ingots was researched. In addition the similarities of non-metallic inclusions in feed ingots and in castings were observed.
12
Content available Analysis of injuries of a driver of a roll caged car sustained during a rollover crash
80%
Peliński J. , Dymek M.
Aktualne Problemy Biomechaniki
|
2020
|
tom z. 19
27--34
PL
Praca przedstawia badania dotyczące ustalenia rozległości obrażeń (Siła normalna oraz tnąca w odcinku szyjnym kręgosłupa oraz ugięcie klatki piersiowej) kierowcy samochodu wyposażonego w klatkę bezpieczeństwa podczas dachowania. Do symulacji został użyty model dyskretny 50 centylowego manekina Hybrid III. Test dachowania pojazdu (1996 Dodge Neon) został przeprowadzony przy użyciu Metody Elementów Skończonych w programie LS-DYNA.
EN
The aim of the study is to analyze the extent of injuries sustained by the driver during a crash rollover. A safety cage for 1996 Dodge Neon was designed following FIA guidelines as well as a seat. 50th percentile male HYBRID III ATD model was utilized. The crashworthiness of the test setup and verification of the injury measures were examined utilizing the Finite Elements Method in LS-DYNA software. Biomechanical injury measures that were investigated include neck normal and shear force and chest deflection.
13
Content available Influence of vibrations during crystallization on mechanical properties and porosity of EN AC-AlSi17 alloy
71%
Ciućka T.
Archives of Foundry Engineering
|
2013
|
tom Vol. 13, iss. 1
5--8
EN
Today’s industry aims at such situation, where number of defective products, so called defects shall approach to zero. Therefore, one introduces a various changes in technology of production, introduces improvements which would help in accomplishment of this objective. Another important factor is introduction of different type of testing, which shall help in assessment which factor has significant effect on quantity of rejects, and which one could be neglected. Existence of casting rejects is unavoidable; therefore a new ideas, technologies and innovations are necessary in the entire widely understood foundry branch, in order to minimize such adverse effect. Performance of tests aimed at unequivocal determination of an effect of vibrations during crystallization on mechanical properties and porosity of the EN AC-AlSi17 alloy was the objective of the present work. To do this, there were produced 36 castings from EN AC-AlSi17 alloy. All the castings underwent machining operations. Half of the casting was destined to strength tests, the other half served to determination of an effect of vibrations on porosity of the alloy. The specimens were divided into 12 groups, depending on amplitude of vibrations and tilt angle of metal mould during pouring operation.
14
Content available remote Control of cast iron and casts manufacturing by Inmold method
71%
Pietrowski S.
Archives of Foundry Engineering
|
2009
|
tom Vol. 9, iss. 3
133-142
EN
In this paper the usability of cast iron spheroidizing process in mould control by ATD method as well as by ultrasonic method were presented. Structure of instrumentation needed for control form performance of cast iron spheroidizing by Inmold method was illustrated. Author, pointed out that amount of magnesium master alloy should obtain 0,8 - 1,0% of mass in form at all. Such quantity of preliminary alloy assure of obtain of nodular graphite in cast iron. In consequence of this, is reduce the cast iron liquidus temperature and decrease of recalescence temperature of graphite-eutectic crystallization in compare with initial cast iron. Control of casts can be carried out by ultrasonic method. In plain cast iron, ferritic-pearlitic microstructure is obtaining. Additives of 1,5% Cu ensure pearlitic structure.
15
Content available remote Influence of vibrations during crystallization of EN AC-ALSi13Cu2 alloy on mechanical and porosity properties
71%
Ciućka T.
Archives of Foundry Engineering
|
2011
|
tom Vol. 11, iss. 2
9-12
EN
Today’s industry aims at such situation, where number of defective products, so called defects shall approach to zero. Therefore, one introduces a various changes in technology of production, introduces improvements which would help in accomplishment of this objective. Another important factor is introduction of different type of testing, which shall help in assessment which factor has significant effect on quantity of rejects, and which one could be neglected. Existence of casting rejects is unavoidable; therefore a new ideas, technologies and innovations are necessary in the entire widely understood foundry branch, in order to minimize such adverse effect. Performance of tests aimed at unequivocal determination of an effect of vibrations during crystallization on mechanical properties and porosity of the EN ACAlSi11 alloy was the objective of the present work. To do this, there were produced 36 castings from EN AC-AlSi11 alloy. All the castings underwent machining operations. Half of the casting was destined to strength tests, the other half served to determination of an effect of vibrations on porosity of the alloy. The specimens were divided into 12 groups, depending on amplitude of vibrations and tilt angle of metal mould during pouring operation.
16
Content available Development of a New ATD-P Tester for Hard Wear Resistant Materials
71%
Dojka M. , Dojka R. , Studnicki A.
Archives of Foundry Engineering
|
2017
|
tom Vol. 17, iss. 1
37--40
EN
The aim of presented studies was to develop a new geometry of the overflow part of standard ATD–C tester for derivative thermal analysis in a way that it would allow to obtain samples for abrasion and mechanical properties tests in the same mould without the need of cutting them from a block of material. The pattern of new ATD–P tester has parts reflecting implemented samples. Computer simulations regarding initial verification of new tester were performed in NovaFlow software. Chromium cast iron melts were made for testing the sampler in real conditions and TDA analysis for casting material were conducted. The sandmix was prepared on silica sand matrix according to the ALPHASET technology. This new solution greatly simplifies the preparations of materials difficult to machine.
17
Content available remote Heat treatment of the EN AC-AlSi9Cu3(Fe) alloy
71%
Pezda J.
Archives of Foundry Engineering
|
2010
|
tom Vol. 10, iss. 2
99--102
EN
Silumins are widely used in automotive, aviation and shipbuilding industries; as having specific gravity nearly three times lower than specific gravity of cast iron the silumins can be characterized by high mechanical properties. Additionally, they feature good casting properties, good machinability and good thermal conductivity. i.e. properties as required for machinery components operating in high temperatures and at considerable loads. Mechanical properties of the silumins can be upgraded, implementing suitably selected heat treatment. In the paper is presented an effect of modification and heat treatment processes on mechanical properties of the EN AC-AlSi9Cu3(Fe) alloy. Investigated alloy has undergone typical processes of modification and refining, and next heat treatment. Temperature range of the heat treatment operations was determined on base of curves from the ATD method. Obtained results concern registered melting and solidification curves from the ATD method and strength tests. On base of the performed tests one has determined range of the heat treatment parameters which would assure obtainment of the best possible mechanical properties of the EN AC-AlSi9Cu3(Fe) alloy.
18
Content available remote Określanie własności mechanicznych siluminu AK20 na podstawie metody ATND
71%
Pezda J.
Archiwum Odlewnictwa
|
2005
|
tom R. 5, nr 17
233--238
PL
W artykule przedstawiono próbę zastosowania jednoczesnej metody Analizy Termiczno-Napięciowo Derywacyjnej do określenia własności mechanicznych siluminu AK20 (Rm). Badany stop został poddany typowym zabiegom rafinacji i modyfikacji. Następnie została przeprowadzona analiza regresji w celu uzyskania równania do określania wytrzymałości na rozciąganie Rm.
EN
The evaluation test of mechanical properties of the AK20 have been described in this paper. The characteristics points obtained from the solidification curves and from the voltage curves, as well from their derivatives have been determined on the state of the solidification and crystallization curves using the method simultaneous recording ATND.
19
Content available remote Effect of dispersion hardening process on elongation of EN AB-43200 silumin
71%
Pezda J.
Archives of Foundry Engineering
|
2008
|
tom Vol. 8, iss. 4
167-170
EN
Aluminum alloys belong to the second, after ferrous alloys, group of material having the biggest application in technology. Mass of metal structures is of important value, what involves lightweight mass of materials used in a given structure. Lightweight metals are used more and more often in metal structures, whereas aluminum and its alloys are the most widespread. Mechanical and technological properties of castings produced from Al-Si alloys depend on correct melting and pouring process, design of the castings and moulds and their heat treatments. Reduction of production costs requires selection of optimal parameters of the heat treatment (temperatures and durations of the treatments). The paper describes implementation of the ATD method to determination of hyperquenching and ageing treatments of EN AB-43200 (AK9) silumin. Investigated alloy was melted in electric resistance furnace. In the next stage the alloy underwent the treatment of refining and modification. Course of crystallization is presented with use of thermal-derivative analysis (ATD). That method was also used to determination of temperature range of heat treatments of the alloy. Obtained results apply to solidification curves recorded with use of the ATD method, light microscopy, strength tests and determination of an effect of heat treatment parameters on A5 elongation of the investigated alloy. On base of the performed tests of heat treated alloys there was determined an effect of selected parameters on obtained elongation (A5).
20
Content available remote Analysis of Al-Mg casting alloys crystallization with use of "ATND" method
71%
Ciućka T.
Archives of Foundry Engineering
|
2008
|
tom Vol. 8, iss. 4
27-30
EN
The paper presents results of non-ferrous metals crystallization tests performed with use of the ATND method. Such tests are performed in the Institute of Chipless Technology, Academy of Technology and Humanities in Bielsko-Biala. Method of analysis of non-ferrous metals crystallization gives complete picture of arisen structural components of alloys. Particular structural components of alloys investigated with use of the ATND method were verified in X-ray microanalysis, what unequivocally confirmed their presence. Below are presented in graphical form (crystallization diagrams) results of crystallization process obtained from the ATND method. In crystallization diagrams of AlMg10 and AG51 alloys are shown curves (thermal curve and its derivative, voltage curve and its derivative). Crystallizable individual structural components of the investigated alloys are reflected on curves of the method in form of characteristic peaks. The tests were performed with AlMg10 and AlMg5Si1 aluminum-magnesium alloys casting. Moreover, the paper presents structures of the investigated alloys with marked structural components identified with use of X-ray microanalysis.
first rewind previous Strona / 2 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.