Wyniki wyszukiwania - BazTech

1

Magnetic memory inspection of an overhead crane girder : experimental verification

Kosoń-Schab Agnieszka, Smoczek Jarosław, Szpytko Janusz

Journal of KONES

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2019

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Vol. 26, No. 2

69--76

EN

The safety and efficiency of material handling systems involve periodical inspections and evaluation of transportation device technical conditions. That is particularly important in case of industrial cranes, since they are subjected to a large impact load and mechanical stresses acting on the crane's structure and equipment. The paper considers the possibility of a crane structure inspection using the metal magnetic memory (MMM) method. As an advanced non-destructive technique, this method can be employed for inspection of crane structure during operation, which leads to reduce the down time costs and increase the safety confidence in the monitoring process. The MMM technique is effective for early identification of the possible defect location and detecting the micro-damage in ferromagnetic structures through detecting the stress concentration areas. The basic principle of MMM method is the self-magnetic flux leakage signal that correlates with the degree of stress concentration. This method allows detecting early damage of ferromagnetic material through performing measurement in the earth magnetic field, without the use of a special magnetizing device. The paper presents the experimental results carried out on the double-girder overhead travelling crane with hoisting capacity 1000 kg. The influence of the load variation and duration time on the intensity of the self-magnetic flux leakage signal is analysed and discussed.

2

Metal Magnetic Memory method used for analyzing high-pressure gas pipelines

Nowakowski A., Paszylk P.

AGH Drilling, Oil, Gas

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2015

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Vol. 32, no. 2

395--404

EN

Keeping the linear part of transmission infrastructure in proper technical condition, ensure an appropriate level of safety require performing a number of exploitation activities. The use of Metal Magnetic Memory (MPM) method, mainly Non-contact Magnetometrie Diagnostics (NMD) is a very interesting solution for gas pipelines testing. The method is used primarily for unpiggable gas pipelines. In the gas industry can be seen a growing interest of use such methods, due to its effectiveness and applicability of NMD tests without the need for excavations and is an alternative to predictive methods. The article present the examples of using the Metal Magnetic Memory method for the high pressure gas pipelines testing with examples of detected defects.

3

The metal magnetic memory method in the diagnostics of power machinery componen

Roskosz M., Rusin A., Kotowicz J.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 43, nr 1

362--370

EN

Purpose: The paper presents the metal magnetic memory method and its application for industrial non-destructive testing. Special emphasis was put on the use of the method for the testing of power equipment and machinery components. Design/methodology/approach: The use of the strength of the residual magnetic field in diagnostics provides macro-scale information on: material discontinuities, defects of the material structure, load history of the component, and the distribution of stresses. Findings: A wide range of applications of the metal magnetic memory method was presented. In many applications, the use of the method provides information which cannot be obtained by means of traditional, standard methods of non-destructive testing (NDT). Research limitations/implications: The metal magnetic memory method can be used for the testing of all ferromagnetic materials and those austenitic steels in which, due to mechanical or thermal load, delta- or sigma ferrite appears. Practical implications: The metal magnetic memory method, as any NDT method, has some usage limitations which result mainly from the structural features of the components under examination and external conditions. Any application of the method for a specific component calls for the development of a research methodology which takes into consideration the load state of the component during examination and the values of the external magnetic field at the place where the examination is being carried out. Originality/value: Possibilities to use the metal magnetic memory method as a defect detection method were presented. Test results were shown which point to significant capacity of the method for detecting areas prone to initiate cracks and cracks in the early stage of their development.

4

Badanie elementów konstrukcyjnych metodą magnetycznej pamięci metalu : aspekty fizyczne metody

Belowski A., Korzeniowski J., Łapiński Z.

Problemy Techniki Uzbrojenia

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2003

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R. 32, z. 88

163--167

PL

W niniejszym artykule przedstawiono fizyczne podstawy badań nieniszczących metodą magnetycznej pamięci metalu. Przedstawiono również ogólne związki pomiędzy naprężeniem a przenikalnością magnetyczną materiału badanego elementu.

EN

Physical backgrounds of non destructive testing by the metal magnetic memory method are presented in the paper. Moreover the dependence between the stress intensity and magnetic permeability in the testing material is considered.

5

Metoda pamięci magnetycznej metalu : kryteria identyfikacji stref koncentracji naprężeń

Korzeniowski J., Łapiński Z., Belowski A.

Problemy Techniki Uzbrojenia

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2002

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R. 31, z. 81

79--82

PL

W artykule przedstawiono kryteria wyróżniania stref koncentracji naprężeń, stosowane w metodzie magnetycznej pamięci metalu. Identyfikacja i ocena omawianych wielkości jest możliwa, przy wykorzystaniu do diagnostyki wyrobów specjalistycznej aparatury.

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Metoda magnetycznej pamięci metalu w zastosowaniu do diagnostyki uszkodzeń konstrukcji stalowych

Korzeniowski J., Łapiński Z., Belowski A.

Problemy Techniki Uzbrojenia

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2002

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R. 31, z. 81

71--78

PL

W artykule przedstawiono zakres stosowania i zalety metody magnetycznej pamięci metalu w porównaniu z innymi metodami badań nieniszczących. Podane zostały kryteria określania obszarów koncentracji naprężeń. Na zakończenie przedstawiono rozkłady składowej normalnej Hpy pola magnetyzmu szczątkowego dla wykonanych wzorców wad.