Effects of laser shock peening on the hot corrosion behaviour of the selective laser melted Ti6Al4V titanium alloy. (1st August 2021)

• Record Type: Journal Article
• Authors: Lu, Haifei; Wang, Zhao; Cai, Jie; Xu, Xiang; Luo, Kaiyu; Wu, Liujun; Lu, Jinzhong
• Is Part Of: Corrosion science. Volume 188(2021)
• Publication Date: 2021-08-01
• Subjects: Selective laser melting -- Laser shock peening -- Ti6Al4V alloy -- Microstructure -- Hot corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109558
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Effect of LSP on hot corrosion behavior of the SLMed Ti6Al4V alloy was studied. The SLM-LSPed specimen has lower mass gain after hot corrosion. LSP generated high-density dislocations and nano-twins. LSP generated the grain boundary effect in the SLMed specimen. LSP efficiently improved hot corrosion resistance of the SLMed Ti6Al4V alloy. Abstract: The effects of laser shock peening (LSP) on the hot corrosion behaviour of the selective laser melted (SLMed) Ti6Al4V titanium alloy were investigated. The results indicated that the SLMed specimen exhibited a significantly lower hot corrosion resistance in comparison to the SLM-LSPed specimen. In addition, high-density dislocations and a large number of nano-twins were generated after LSP treatment, which contributed to the grain boundary effect in the surface layer. The coupling effect of LSP-induced grain boundary effect and plastic deformation effectively improved the hot corrosion resistance of the SLMed Ti6Al4V.