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MECHANICAL PROPERTIES AND MICROSTRUCTURE OF ULTRAFINE-GRAINED MAGNESIUM ALLOYS CONTAINING NEODYMIUM AND ZINC

1 ŠAŠEK Stanislav
Co-authors:
1 STRÁSKÁ Jitka 1 MINÁRIK Peter 2 BOHLEN Jan 3 KUBÁSEK Jiří
Institutions:
1 Charles University, Department of Physics of Materials, Czech Republic, Prague, EU, sasekstanislav@seznam.cz
2 Helmholtz Zentrum Geesthacht, Magnesium Innovation Centre, Geesthacht, Germany, EU
3 University of Chemistry and Technology Prague, Faculty of Chemical Technology, Department of Metals and Corrosion Engineering, Prague, Czech Republic, EU
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
1291-1296
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
DOI:
https://doi.org/10.37904/metal.2019.765
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
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Abstract

Two experimental magnesium alloys containing neodymium and zinc (Mg-5Nd-1Zn and Mg-1Nd-1Zn) were processed by severe plastic deformation (SPD) method - equal channel angular pressing (ECAP). The effect of SPD processing on the microstructure was studied by light microscopy (LM) and scanning electron microscopy (SEM) including electron backscatter diffraction (EBSD). A significant grain refinement was observed after 8 passes of ECAP in both alloys resulting in homogenous ultra-fine grained condition. Microstructure evolution significant affected mechanical properties, which were studied by microhardness measurements and compression deformation tests. Both yield compression strength σ0.2 and microhardness significantly increased after ECAP when compared to the extruded or as-cast counterparts.

Keywords: Magnesium alloys, ultra-fine grained materials, equal channel angular pressing, electron backscatter diffraction

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