CHARACTERIZATION OF MICROSTRUCTURE AND MECHANICAL PROPERTIES OF MAGNESIUM ALLOYS WITH NEODYMIUM AND YTTRIUM PROCESSED BY EXTRUSION

1 ZEMKOVÁ Mária
Co-authors:
1 DROZDENKO Daria 2 BOHLEN Jan 1 MINÁRIK Peter
Institutions:
1 Department of Physics of Materials, Charles University, Prague, Czech Republic, EU, e-mail: 1zemkova.maria1@gmail.com
2 Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH, Geesthacht, Germany, EU
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1531-1536
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
21 views / 4 downloads
Abstract

Intensive efforts have been recently made for a production and a processing of Mg-based light structural alloys, which would provide a utilization in the automotive and aerospace engineering, medical implants and equipment, power generation system, etc. In this study, three magnesium alloys containing neodymium and/or yttrium were investigated in an extruded condition. Microstructure of the extruded samples was investigated by scanning electron microscope including EBSD and X-ray diffraction. Mechanical behaviour of the alloys was studied by compression deformation tests in the extrusion direction (ED) and transverse direction (TD). Acoustic emission technique was concurrently applied to investigate activity of particular deformation mechanisms. The highest mechanical strength was found in the WN43 alloy, which contained the highest amount of rare earths. On the other hand, no difference in a mechanical strength between N2 and W4 alloy was observed. This resulted from lower grain size and higher fraction of precipitates found in the N2 samples. Different shape of the deformation curves between ED and TD was observed in two alloys containing neodymium. This behaviour corresponded to different texture formation and was attributed to an increased activation of twinning in one deformation direction, which was proved by acoustic emission measurement.

Keywords: Magnesium alloys, rare earths, mechanical properties, texture, twinning
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