Effect of laser shock processing (LSP) on the fatigue resistance of an aluminum alloy

Authors
Tang, YX Zhang, YK Zhang, H Yu, CY
Citation
Yx. Tang et al., Effect of laser shock processing (LSP) on the fatigue resistance of an aluminum alloy, J ENG MATER, 122(1), 2000, pp. 104-107
Citations number
8
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
ISSN journal
00944289 → ACNP
Volume
122
Issue
1
Year of publication
2000
Pages
104 - 107
Database
ISI
SICI code
0094-4289(200001)122:1<104:EOLSP(>2.0.ZU;2-F
Abstract
The laser shock induced stress wave is described and measured with a polyvi nylidene fluoride (PVDF) transducer. A principle for selecting laser parame ters is proposed. A small sized laser with a high power is used for Laser S hock Processing (LSP). The fatigue life of the aluminum alloy 2024T62 is gr eatly improved after LSP. With 95% confidence, the mean fatigue life of LSP specimens is 4.5-9.8 times that of unshocked ones. The fatigue and fractur e resistance mechanisms of LSP such as the variation of the surface hardnes s, the microstructure and the fracture section of specimens before and afte r LSP are analyzed.