Effect of Al and Gd Solutes on the Strain Rate Sensitivity of Magnesium Alloys

被引：91

作者：

Stanford, N. ^{[1
]}

Sabirov, I. ^{[2
]}

Sha, G. ^{[3
]}

La Fontaine, A. ^{[3
]}

Ringer, S. P. ^{[3
]}

Barnett, M. R. ^{[1
]}

机构：

[1] Deakin Univ, Ctr Excellence Design Light Met, Geelong, Vic 3217, Australia

[2] ETS Ingenieros Caminos, IMDEA Mat, Madrid 28040, Spain

[3] Univ Sydney, Australian Key Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2010年 / 41A卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

TEXTURE DEVELOPMENT; SERRATED FLOW; MG; DUCTILITY;

D O I：

10.1007/s11661-009-0107-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pure magnesium and two binary alloys, Mg-1 wt pct Al and Mg-1.4 wt pct Gd, have been prepared with comparable grain sizes and textures. The alloys have been tensile tested at various strain rates and temperatures to examine the strain rate sensitivity (SRS). It has been found that Mg and Mg-Al show increasing SRS with increasing deformation temperatures. The Mg-Gd alloy showed decreasing SRS with increasing deformation temperatures and exhibited a negative SRS at 200 A degrees C and 250 A degrees C. Above these temperatures, the SRS returned to a positive value. The elongation to fracture was not effected by the SRS, and it has been concluded that for the alloys and conditions examined, the influences of mechanical twinning and dynamic recrystallization dominate the elongation behavior, rather than the SRS.

引用

页码：734 / 743

页数：10

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