Utilization of acoustic emission at study of mechanical properties and structure of magnesium-aluminium alloy AZ61 under elevated temperatures

• Autorzy: Cizek L. , Hanus A. , Lichy P. , Tański T. , Kraus M. , Rusz S. , Borek W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This work present experimental determination of the elastic-plastic condition of the magnesium alloy depending on the temperature and pace of the sample tensile stress. Design/methodology/approach: At the acoustic emission (next denoted the „AE”) use, tensile tests at high temperatures may, among other things, be used for analysis of the AE signal sources and set, in more detail, the temperature limit of elastic-plastic deformations existence in the material under examination. The AE is, during tensile tests at high temperatures, based on the scanning of released elastic waves generated by sharp tension changes in the body as a result of the subsequent physical-metallurgical processes such as plastic deformation, tension redistributing, creation of microcracks and their spreading in macroscopic scale. Findings: The aim of the acoustic emission monitoring at tensile tests at higher temperatures is therefore the specification of the critical heat barrier of the elastic-plastic condition of materials and provision of information concerning the dynamics of deformation processes at tension including influences of surface layers for which acoustic emission, as confirmed by measurement results is a very suitable method. Research limitations/implications: The results of testing above mentioned magnesium alloys will serve for evaluation of possibility those magnesium alloys for application of SPD methods. Presented work was further focused on determination of structure characteristics including investigation of fracture characteristics with use of light microscopy and SEM analysis. Originality/value: Knowledge of the relaxation properties of metal materials at high temperatures is necessary for the verification of susceptibility of castings to the creation of defects during the production process. Generated tensions in the castings are the cause of creation and development of defects.

Słowa kluczowe

EN

magnesium alloys; mechanical properties; elevated temperatures; structure; acoustic emission

PL

stopy magnezu; właściwości mechaniczne; podwyższona temperatura; struktura; emisja akustyczna

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2014
• Tom: Vol. 68, nr 2
• Strony: 66--74
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Cizek L.

• VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Hanus A.

• VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Lichy P.

• VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Tański T.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Kraus M.

• VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Rusz S.

• VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Czech Republic

autor

Borek W.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

Bibliografia

• [1] M. Avedisian, H. Baker, Magnesium and Magnesium Alloys, ASM Speciality Handbook, 1999.
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• [3] L.Cížek, M. Greger, L. Pawlica, L.A. Dobrzański,T. Tański, Study of selected properties of magnesium alloy AZ91 after heat treatment and forming, Journal of Materials Processing Technology 157-158 (2004) 466-471.
• [4] C.B. Sruby, J.H. Speake, Acoustic Emission for Physical Examination of Metals, International Metals Reviews 2 (1980) 41-64.
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• [8] L.A. Dobrzański, W. Borek, Hot-Working Behaviour of Advanced High-Manganese C-Mn-Si-Al Steels, Materials Science Forum 654-656 (2010) 266-269.
• [9] F. Havlíþek, P. Kozelský, J. Crha, Monitoring of tensile test by acoustic emission at elevated temperatures, Sborník mez. Konference „Spolupráce 2005“, Zako-pane 7-9.04.2005, 75-84 (in Czech).
• [10] T. Tański, L.A. Dobrzański, L. Cížek, Influence of heat treatment on structure and properties of the cast magnesium alloys, Proceedings of the International Conference on Processing & Manufacturing of Advanced Materials, Processing, Fabrication, Properties, Applications, THERMEC'2006, Vancouver, Canada, CD-ROM.
• [11] L.Cížek, M. Greger, L.A. Dobrzański, I. Juricka, R. Kocich, L. Pawlica, T. Tański, Mechanical properties of magnesium alloy AZ91 at higher temperatures, Journal of Achievements in Mechanical and Materials Engineering, 18 (2006) 203-206.
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