Microstructure and fatigue properties of the ultrafine-grained AM60 magnesium alloy processed by equal-channel angular pressing

被引：74

作者：

Kulyasova, Olga ^{[1
]}

Islamgaliev, Rinat ^{[1
]}

Mingler, Bernhard ^{[2
]}

Zehetbauer, Michael ^{[2
]}

机构：

[1] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia

[2] Univ Vienna, Fac Phys, A-1090 Vienna, Austria

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 503卷 / 1-2期

关键词：

Equal-channel angular pressing (ECAP); Magnesium alloy AM60; Fatigue tests; Transmission electron microscopy (TEM); Microstructure; SUPERPLASTICITY;

D O I：

10.1016/j.msea.2008.03.057

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper reports on the microstructures and fatigue properties of the ultrafine-grained AM60 magnesium alloy processed by equal-channel angular pressing (ECAP) at various temperatures. After ECAP processing, samples exhibited an increase in fatigue endurance limit, which correlates well with a decrease in grain size. For the lowest ECAP temperature, the mean grain size is as small as 1 mu m which leads to an increase in the fatigue endurance limit by 70% in comparison to coarse-grained alloy. The temperature of ECAP not only governs the grain size but also the volume fraction of precipitates, thus affecting the probability of twinning and grain growth after fatigue treatment. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：176 / 180

页数：5

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