期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.08.084
关键词
Aluminum alloy; Laser shock peening; SEM; Corrosion resistance; Stress corrosion
类别
资金
- National Nature Science Foundation of China [51275221]
- Natural Science Foundation of Jiangsu Province [BK2011261]
- Natural Science Foundation of the Jiangsu Higher Education Institutions [12KJB460002]
- Applied Science Foundation of Jiangsu University of Technology [KYY12040]
- Open Foundation of Jiangsu Provincial Key Laboratory for Science and Technology of Photon Manufacturing [GZ201101, GZ201202]
7075 aluminum alloy weldments were processed by an intensive process known as laser shock peening (LSP), meanwhile its stress corrosion behaviors were observed by scanning electron microscopy (SEM) and slow strain rate tensile (SSRT) tests. Results showed that the effect of LSP on corrosion behavior of the joint was fairly useful and obvious. With LSP, the elongation, time of fracture and static toughness after the SSRT test were improved by 11.13%, 20% and 100%, respectively. At the same time, the location of the fracture also changed. LSP led to a transition of the fracture type from transgranular to intergranular The reasons for these enhancements of the joint on corrosion behavior were caused by microstructure, residual stress, micro-hardness, and fracture appearance. (C) 2015 Elsevier B.V. All rights reserved.
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