Extraordinary superplastic ductility of magnesium alloy ZK60

被引：69

作者：

Lapovok, R ^{[1
]}

Cottam, R

Thomson, P

Estrin, Y

机构：

[1] Monash Univ, Sch Phys & Mat Engn, Clayton, Vic 3800, Australia

[2] Tech Univ Clausthal, Inst Werkstoffkunde & Werkstofftech, D-38678 Clausthal Zellerfeld, Germany

来源：

JOURNAL OF MATERIALS RESEARCH | 2005年 / 20卷 / 06期

关键词：

D O I：

10.1557/jmr.2005.0180

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exceptionally high tensile ductility of commercial Mg alloy ZK60 is reported. It was achieved by equal channel angular pressing without any extra processing steps. The tensile ductility at 220 degrees C was 2040% and 1400% for the strain rates of 3 x 10(-4) s(-1) and 3 x 10(-3) s(-1), respectively. The strain rate sensitivity of the flow stress exhibited a value slightly above 0.5, which is characteristic of superplastic deformation. The grain structure associated with this behavior was shown to be bi-modal with further separation in two fractions with different grain sizes within the small grain size population.

引用

页码：1375 / 1378

页数：4

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