Enhanced mechanical behavior and reduced mechanical anisotropy of AZ31 Mg alloy sheet processed by ECAP

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:650

Article

Suh, Joungsik¹  Victoria-Hernandez, Jose²  Letzig, Dietmar²  Golle, Roland¹  Volk, Wolfram¹ 

[1] Tech Univ Munich, Inst Met Forming & Casting, D-85748 Garching, Germany

[2] Helmholtz Zentrum Geesthacht, Magnesium Innovat Ctr, D-21502 Geesthacht, Germany

关键词: ECAP;    Magnesium alloy;    Texture;    Anisotropy;    Work hardening;   

DOI  :  10.1016/j.msea.2015.09.058

来源: Elsevier

【 摘 要 】

AZ31 Mg alloy sheets were processed by equal channel angular pressing (ECAP) at 225 degrees C with a channel angle of 110 degrees regarding a strain path change. In consideration of mechanical anisotropy of Mg sheets, the sheet was processed by ECAP along the rolling direction in the first pass. Subsequently, it was processed along the transverse direction by 90 degrees rotation in the sheet plane. This shear deformation led to grain refinement and developed basal texture with tilted basal planes towards the pressing direction. The presented processing route, which is denoted as route D, reduced mechanical anisotropy and enhanced hardening behavior. Consequently, AZ31 sheet, which was processed by ECAP on route D, exhibited an almost isotropic hardening at room temperature with improved ductility. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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