Fatigue performance of high-pressure waterjet-peened aluminum alloy

被引：36
|
作者：
Ramulu, M [1 ]
Kunaporn, S
Jenkins, M
Hashish, M
Hopkins, J
机构：
[1] Univ Washington, Dept Mech Engn, Seattle, WA 98195 USA
[2] Flow Int Corp, Kent, WA 98032 USA
来源：
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME | 2002年 / 124卷 / 01期
关键词：
D O I：
10.1115/1.1398553
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
An experimental study of high-pressure waterjet peening on 7075-T6 aluminum alloy was conducted to investigate the effects of waterjet on high -cycle fatigue life and fatigue crack growth. Unnotched hourglass-shaped circular cross section test specimens were fatigue tested in completely reversed rotating bending (R = S-min/S-max = -1) to determine fatigue life behavior (S-N curves). Single-edge-notched flat tensile test specimens were tested in the tension-tension fatigue crack growth tests (R=S-min/S-max=0.1) to determine fatigue crack propagation behavior (da/dN versus DeltaK). Surface characteristics and fracture surfaces were evaluated by scanning electron microscopy (SEM). Results show that waterjet peening can increase high-cycle fatigue life, delay fatigue crack initiation, and decrease the rate of fatigue crack propagation.
引用
收藏
页码：118 / 123
页数：6
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