Effect of laser shock peening on aluminium alloy laser-welds. (1st December 2016)

• Record Type: Journal Article
• Authors: Sun, G.; Fang, X.; Tong, Z.; Ni, Z.; Lu, Y.
• Is Part Of: Surface engineering. Volume 32:Number 12(2016)
• Page Start: 943
• Page End: 948
• Publication Date: 2016-12-01
• Subjects: Laser welding -- Laser peening -- Aluminium alloys -- Stress relaxation -- Fracture; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2016.1194513
• Languages: English
• ISSNs: 0267-0844

Abstract

Abstract : Effects of laser shock peening (LSP) on laser-welded aluminium alloy joints filling Al + 1.0 wt-% CeO2 were investigated. Porosity ratio, microstructure, residual stress, hardness, tensile strength and fracture morphology were evaluated. Double-side LSP decreased the porosity ratio, refined microstructure, relieved the residual compressive stresses and increased the micro-hardness and tensile strength of the welds. Interaction between porosity and residual stress was also illustrated.