A new magnesium sheet alloy and its multi-stage homogenization for simultaneously improved ductility and strength at room temperature

SCRIPTA MATERIALIA

卷:171

Article

Shi, Renhai¹  Miao, Jiashi¹  Luo, Alan A.^1,2 

[1] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43210 USA

[2] Ohio State Univ, Dept Integrated Syst Engn, Columbus, OH 43210 USA

关键词: Magnesium sheet alloys;    CALPHAD;    Multi-stage homogenization;    Rolling;    Zener grain-pinning;   

DOI  :  10.1016/j.scriptamat.2019.06.027

来源: Elsevier

【 摘 要 】

A new Mg-2Zn-03Ca-0.2Ce-0.1Mn(1) (ZXEM2000) alloy and a multi-stage homogenization process have been designed and developed based on CALculation of Phase Diagram (CALPHAD) modeling results and experimental validation. The new sheet alloy offers an excellent combination of ductility (about 29% elongation) and yield strength (157 MPa), promising room-temperature forming applications. Microstructure characterization reveals that the exceptional properties of this alloy are mainly attributed to the weak basal texture, fine average grain size and high density of nano-scale Mn and Mg6Zn3Ca2 precipitates achieved through multi-stage heat treatment and therrnomechanical processing. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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