Affiliation:
1. NASA-Johnson Space Center
2. Metal Improvement Company
Abstract
The influence of laser peening on the fatigue crack growth behavior of friction stir welded
(FSW) Aluminum Alloy (AA) 7075-T7351 sheets was investigated. The surface modification resulting
from the peening process on the fatigue crack growth of FSW was assessed for two different R ratios.
The investigation indicated a significant decrease in fatigue crack growth rates resulting from using
laser shock peening compared with unpeened, welded and unwelded specimens. The slower fatigue
crack growth rate was attributed to the compressive residual stresses induced by the peening.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
3 articles.
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