Hall-Petch parameters for tension and compression in cast Mg

被引：63

作者：

Andersson, P ^{[1
]}

Cáceres, CH

Koike, J

机构：

[1] Univ Queensland, Sch Engn, Div Mat, Brisbane, Qld 4072, Australia

[2] Tohoku Univ, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

MAGNESIUM ALLOYS 2003, PTS 1 AND 2 | 2003年 / 419-4卷

关键词：

grain size; Hall-Petch relationship; yield stress; magnesium;

D O I：

10.4028/www.scientific.net/MSF.419-422.123

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The flow stress in tensile and compressive deformation has been determined in cast Mg, for a wide range of grain sizes between 36 mum and 1.5 mm. The grain size was varied by alloying Mg with small amounts of Zr. It was found that the 0.2% offset flow stress, sigma(y) (MPa), varies with the grain size, d (m), as sigma(y) = 17.7 + 0.25 d(-1/2) in tension, while sigma(y) = -2.3 + 0.39 d(-1/2) in compression. Possible reasons for the difference between tension and compression are discussed.

引用

页码：123 / 128

页数：6

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