Research progress on laser shock peened microstructure and thermal stability of additive manufactured titanium alloy

doi:10.13251/j.issn.0254-6051.2022.08.041

Abstract

Abstract: Firstly, the action mechanism of laser shock peening(LSP) is summarized. Then the research status of laser peening to improve the microstructure and properties of titanium alloys additive manufactured at home and abroad is reviewed. On this basis, it is discussed that the limitation of the application of LSP in additive manufacturing is largely due to the existence of a large number of non-equilibrium structures, which will turn to an equilibrium state to change the properties under thermodynamics. Furthermore, some attempts and problems in thermodynamics and kinetics to stabilize the nanocrystalline structure induced by LSP are summarized, and it is innovatively proposed that nitrides and solid solution atoms can be precipitated by nitriding with good diffusion properties of LSP to hinder the migration of grain boundaries. Finally, the future research direction in this field and the establishment of a database of additive manufacturing titanium alloy-LSP-thermal stability are proposed to promote the development of the field.

Key words: additive manufacturing, titanium alloy, laser shock peening, microstructure, thermal stability

CLC Number:

TG156.99

Wang Jun, He Bo, Lei Yiyu, Jia Wenjing, Lan Liang, Gao Shuang. Research progress on laser shock peened microstructure and thermal stability of additive manufactured titanium alloy[J]. Heat Treatment of Metals, 2022, 47(8): 242-248.

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