Title of article
Effects of laser peening with different coverage areas on fatigue crack growth properties of 6061-T6 aluminum alloy
Author/Authors
S. Huang، نويسنده , , J.Z. Zhou، نويسنده , , J. Sheng، نويسنده , , K.Y. Luo، نويسنده , , J.Z. Lu، نويسنده , , Z.C. Xu، نويسنده , , X.K. Meng، نويسنده , , L. Dai، نويسنده , , L.D. Zuo، نويسنده , , H.Y. Ruan، نويسنده , , H.S. Chen، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2013
Pages
8
From page
292
To page
299
Abstract
The effects of coverage area on fatigue crack growth (FCG) properties of 6061-T6 aluminum alloy subject to multiple laser peening (LP) impacts were investigated. Residual stress, micro-structure and fatigue striation pattern on fracture cross-sections were analyzed. Compressive residual stresses and dense dislocation arrangements can be found in the superficial layer after LP. LP coverage area has a direct influence on FCG properties as verified by different size of shell ridges and fatigue striation spacing on fracture cross-sections. Meanwhile, FCG rate decreases with the increase of compressive residual stresses distribution perpendicular to the crack growth direction in the initial FCG stage.
Keywords
Laser peening , Fatigue crack growth rate , Fatigue striation , Fracture , Coverage area
Journal title
INTERNATIONAL JOURNAL OF FATIGUE
Serial Year
2013
Journal title
INTERNATIONAL JOURNAL OF FATIGUE
Record number
1162637
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