A semianalytical Sachs model for the flow stress of a magnesium alloy

被引：191

作者：

Barnett, M. R.

Keshavarz, Z.

Ma, X.

机构：

[1] Centre for Material and Fibre Innovation, Deakin University, Geelong

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2006年 / 37A卷 / 07期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1007/BF02586147

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A semianalytical Sachs-type equation for the flow stress of magnesium-base alloys is developed using the Schmid law, power law hardening, and a sigmoidal increase in the twinning volume fraction with strain. Average Schmid factors were estimated from electron backscattered diffraction (EBSD) data. With these, the equation provides a reasonable description of the flow curves obtained in compression and tension for samples of Mg-3Al-1Zn cut in different orientations from rolled plate. The model illustrates the general importance of basal slip and twinning in magnesium alloys. The significance of prismatic slip in room temperature tension testing is also highlighted. This is supported with EBSD slip line trace analysis and rationalized in terms of a possible sensitivity of the critical resolved shear stress for prismatic (cross) slip to the stress on the basal plane.

引用

页码：2283 / 2293

页数：11

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