Effect of shot peening on fretting fatigue of Ti811 alloy at elevated temperature

被引：73
|
作者：
Zhang, Xiaohua [1 ]
Liu, Daoxin [1 ]
机构：
[1] NW Polytech Univ, Corros & Protect Res Lab, Xian 710072, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2009年 / 31卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Titanium alloy; Fretting fatigue; Shot peening; Elevated temperature; Residual stress; TI-6AL-4V; COATINGS; ENGINE;
D O I：
10.1016/j.ijfatigue.2008.10.004
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of compressive residual stress, surface roughness, microstructure hardening induced by shot peening (SP) on the fretting fatigue (FF) resistance of Ti811 titanium alloy at elevated temperature were evaluated. The results show that SP improves the FF resistance of Ti811 alloy at 350 degrees C, but decreases the resistance at 500 degrees C. Compressive residual stress is the predominant factor in improving the FF resistance of the alloy at 350 degrees C. Compressive residual stress induced by SIR arrests crack growth. Microstructure hardening due to SP has a minor effect on FF resistance. Surface roughening induced by SP is detrimental to the FF resistance of the alloy at both 350 and 500 degrees C, as microcracks initiate easily in the roughened surface under these conditions. (C) 2008 Elsevier Ltd. All rights reserved.
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页码：889 / 893
页数：5
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