Effects of calcium and rare-earth elements on the microstructure and tension-compression yield asymmetry of ZEK100 alloy

被引：39

作者：

Kamrani, S. ^{[1
]}

Fleck, C. ^{[1
]}

机构：

[1] Inst Technol Berlin, Dept Mat Engn, D-10623 Berlin, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 618卷

关键词：

Magnesium alloy; Yield asymmetry; Microstructure; Texture; Precipitates; MAGNESIUM ALLOYS; MECHANICAL-PROPERTIES; GRAIN-SIZE; TEXTURE; MG; BEHAVIOR; DEFORMATION; STRONTIUM;

D O I：

10.1016/j.msea.2014.09.023

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Variations of the Mg-Zn-Zr alloy ZK100 were cast and extruded containing rare-earth elements and different amounts of Ca (0.4 and 0.8 wt%). After extrusion and heat treatment, the tensile and compressive mechanical properties of the alloys were evaluated at room temperature. The effects of calcium and rare-earth elements on the microstructure, texture and tension-compression yield asymmetry of the ZEK100-based alloys were studied. The microstructural investigation revealed fine and uniformly distributed Mg-Ca and Mg-RE precipitates throughout the volume of the specimens. A weak texture and a fully recrystallized and homogeneous grain structure were observed in the ZEK100-Ca alloys. The reduced yield asymmetry of the ZEK100-Ca alloys is attributed to the fine grain size, the weak texture, and the small precipitates of these alloy variants. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：238 / 243

页数：6

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