The microstructural evolution of a pre-alloyed AZ91 magnesium alloy powder through high-energy milling and subsequent isothermal annealing

被引：16

作者：

Taleghani, M. A. Jabbari ^{[1
,2
]}

Torralba, J. M. ^{[1
,2
]}

机构：

[1] Univ Carlos III Madrid, Dept Mat Sci & Engn, Madrid 28911, Spain

[2] IMDEA Mat Inst, Madrid 28906, Spain

来源：

MATERIALS LETTERS | 2013年 / 98卷

关键词：

AZ91 magnesium alloy; Pre-alloyed powder; High-energy milling; Isothermal annealing; Microstructural evolution; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; EXTRUSION; COMPOSITE;

D O I：

10.1016/j.matlet.2013.02.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study analyzed the effect of high-energy milling (HEM) and subsequent isothermal annealing on the microstructural characteristics of a pre-alloyed AZ91 Mg alloy powder. To this end, the mentioned powder was milled for 14 h using a horizontal attritor. Then, the mechanically milled powder was isothermally annealed at temperatures ranging from 200 degrees C to 500 degrees C for I h up to 4 h in an Ar atmosphere. HEM caused the beta-Mg17Al12 phase present in the microstructure of AZ91 powder particles to dissolve into their alpha-Mg solid solution matrix. In addition, the crystallite size of the alpha-Mg phase decreased to 25 nm through HEM. In contrast to the annealing time, the temperature of isothermal annealing had a significant effect on the microstructural features of the mechanically milled AZ91 powder. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：182 / 185

页数：4

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