Numerical investigation of the effect of oblique laser shock processing parameters on the residual stress and deformation characteristics of TC6 titanium alloy

Author:

Liu Yue1ORCID,Li Sina1ORCID,Wang Chongyang1,Zhao Yanmin2,Azad Fahad3ORCID,Su Shichen1ORCID

Affiliation:

1. School of Semiconductor Science and Technology, South China Normal University 1 , Foshan 528000, People’s Republic of China

2. Zhongshan Institute of Changchun University of Science and Technology 2 , Zhongshan 528437, People’s Republic of China

3. School of Natural Sciences (SNS), National University of Sciences and Technology (NUST) 3 , Islamabad 44000, Pakistan

Abstract

Oblique laser shock processing (OLSP) can provide a new solution for improving the mechanical properties of complex structural elements. In this paper, a spatial distribution model of OLSP shock wave pressure is established and validated to study the residual stress (RS) field and surface morphology of titanium alloy TC6 treated by OLSP using the finite element method. The effects of the incident angle, overlapping rate, and scanning pattern on the RS field and surface morphology were investigated. The OLSP results indicate that the overlapping rate should be at least 50%. The RS field and surface morphology obtained with the interval scanning pattern are more uniform compared to snake and spiral. With a 50% overlapping rate and interval scanning pattern, the surface roughness was found to be 0.16, and the surface residual compressive stress fluctuation amplitude was reduced by 40.07%. The results provide a theoretical basis for complex structures of LSP.

Funder

National Nature Science Foundation of China

Rural Science and Technology Commissioner Project

Scientific and Technology Plan of Guangdong Province

Publisher

Laser Institute of America

Subject

Instrumentation,Biomedical Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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