Abstract
The present study explored the impact of laser shock peening (LSP) and abrasive water jet peening (WJP) on the physical, surface and wear properties of direct metal laser sintered (DMLS) AlSi10Mg alloy. The microstructure, phase composition, hardness, roughness, work of adhesion, residual stresses and wear properties of As-built AlSi10Mg, laser shock peened AlSi10Mg and water jet peened AlSi10Mg were evaluated. The results showed that both WJP and LSP could improve the hardness and wear resistance of DMLS AlSi10Mg alloy. Amongst, LSP was more effective than WJP in reducing the wear rate and coefficient of friction due to refined microstructure. Wear mechanisms were transformed from abrasive to fatigue after the LSP. Furthermore, the influences of roughness, residual stresses and hardness on the wear properties were discussed in detail.
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