High temperature wear performance of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy subjected to laser shock peening

ABSTRACT

This paper investigates the influence of laser shock peening (LSP) parameters on surface integrities and high temperature wear performances of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy. Surface integrities include surface roughness, residual stress and micro-hardness are measured. High temperature wear performance of TC11 alloy with and without LSP are investigated. The results indicate that multiple LSP impacts can improve surface micro-hardness and induce compressive residual stress in the surface layer. Moreover, the friction coefficient and wear rate of TC11 alloy significantly decrease after LSP with optimised parameters. The improved wear performance is ascribed to the low surface roughness, higher surface micro-hardness and compressive residual stress induced by multiple LSP impacts in the surface layer.

KEYWORDS:

• Laser shock peening (LSP)
• TC11 alloy
• parameter
• high temperature wear performance

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Natural Science Foundation of Jiangsu Province [grant number BK20160014]; the National Natural Science Foundation of China [grant number 51479082]; the ‘333 Project’ of Jiangsu Province [grant number BRA2017389]; and the 2015 Innovation & Entrepreneurship Project of Jiangsu Province., the Research Innovation Program for College Graduates of Jiangsu Province [grant number KYCX18_2222].