Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 528, Issue 13-14, Pages 4652-4657Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.02.054
Keywords
Laser shock processing (LSP); Laser welding; Mechanical property; Fracture morphology; ANSI 304 stainless steel
Categories
Funding
- National Natural Science Foundation of China [50705038, 50735001]
- Natural Science Foundation of Jiangsu Province [BK2010352]
- Innovation Program of Graduated Student of Jiangsu Province [CX10B-250Z]
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The laser welded ANSI 304 stainless steel joint was treated by laser shock processing (LSP) with different shocked paths, that is, single-sided LSP impacts and two-sided LSP impacts. The tensile test of the tensile samples was carried out by MC electronic tensile testing machine, and the fractographes of the tensile samples were characterized by scanning electron microscope (SEM). Results showed that compared with single-sided LSP impacts, the mechanical properties ( including the yield strength, the tensile strength, the elongation and the area reduction) of the laser welded ANSI 304 stainless steel was clearly improved by two-sided LSP impacts. Based on the analysis of the SEM observation, the ductility of the treated samples by two-sided LSP impacts was better than that by single-sided LSP impacts due to more and deeper elongated dimples in the fracture. (C) 2011 Elsevier B.V. All rights reserved.
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