Reduced temperature (22-100°C) ageing of an Mg-Zn alloy

被引：100

作者：

Buha, J. ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 492卷 / 1-2期

基金：

日本学术振兴会;

关键词：

magnesium alloys; age hardening; TEM; HRTEM; 3DAP;

D O I：

10.1016/j.msea.2008.02.038

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Heat treatment at intermediate temperatures (70-100 degrees C) doubles the age hardening response of the binary Mg-2.8 at.% Zn alloy when compared to the conventional T6 heat treatment and ambient temperature ageing. The maximal hardening produced at 70 degrees C is associated with the highest number density of the homogeneously distributed precipitates. At least six different types of coherent and semicoherent precipitates were Simultaneously present in the microstructure aged at 70 degrees C: [0 0 0 1](Mg) rods and laths, Guinier Preston (GP) zones, GP1 zones {0 0 0 1}(Mg) plates and prismatic precipitates containing 19-26 at.% Zn. Artificially aged alloy is strengthened mainly by sparsely distributed P, and P, precipitates and occasional GP zones. Strengthening in the naturally aged condition is produced by the combination of GP1 zones, prismatic precipitates and Clusters containing about 20 Z(n) atoms. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：11 / 19

页数：9

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