Investigation of Mechanical Properties and Microstructure of Non-Commercial Magnesium Alloy Prepared by Extrusion and ECAP

M. Zemkováa, J. Bohlenb, J. Čapeka, B. Hadzimac, R. Krála, P. Minárika aCharles University, Department of Physics of Materials, Prague, Czech Republic bHelmholtz-Zentrum Geesthacht, Magnesium Innovation Center, Geesthacht, Germany cUniversity of Žilina, Research Center, Univerzitná 8215/1, Žilina, Slovak Republic

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Extruded magnesium alloy containing yttrium and neodymium, was processed by equal channel angular pressing (ECAP). Microstructure and mechanical properties were investigated in samples prepared by one (1P), two (2P), four (4P) and eight (8P) ECAP passes. Microstructure observations were performed by scanning electron microscope equipped with EBSD camera. The mechanical strength of the samples was evaluated by compression deformation tests in the processing direction (X) and in the transverse direction (Y). Additionally, an effect of solid solution treatment of the as-extruded material on the precipitation processes during ECAP was investigated. The results showed that ECAP significantly improves the mechanical properties of the investigated alloy gradually with the increasing number of passes through grain refinement and severe precipitation. It was shown that solute solution treatment prior to the ECAP has no effect on the mechanical properties.

DOI:10.12693/APhysPolA.134.905 PACS numbers: 81.05.Bx, 81.40.Gh, 81.40.Cd