Effect of stress ratio on the fatigue behavior of a friction stir processed cast Al-Si-Mg alloy

被引：37

作者：

Jana, S. ^{[1
,3
]}

Mishra, R. S. ^{[1
]}

Baumann, J. B. ^{[2
]}

Grant, G. ^{[3
]}

机构：

[1] Missouri Univ Sci & Technol, Rolla, MO 65409 USA

[2] Boeing Co, St Louis, MO 63166 USA

[3] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

SCRIPTA MATERIALIA | 2009年 / 61卷 / 10期

基金：

美国国家科学基金会;

关键词：

Friction stir processing; Cast aluminum alloys; Fatigue; Microstructure; MICROSTRUCTURE;

D O I：

10.1016/j.scriptamat.2009.08.011

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of friction stir processing (FSP) on the fatigue life of a cast Al-7Si-0.6 Mg alloy at stress ratios of R = 0 and R = - 1 was evaluated. Two types of specimen geometry were used for the FSPed condition, through thickness processed and partial thickness processed. At R = 0, the microstructural refinement enhanced the fatigue life by a factor of 15, whereas at R = - 1 the improvement in fatigue life was 5-fold. In light of these observations, various closure mechanisms were examined. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：992 / 995

页数：4

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