Research on Formation Mechanism of Dynamic Response and Residual Stress of Sheet Metal Induced by Laser Shock Wave

Aixin Feng,Zhengang Zhang,Heng Wang,Yupeng Cao

doi:10.1051/epjconf/201816705007

Aixin Feng, Zhengang Zhang + Show 2 more

Open Access

https://doi.org/10.1051/epjconf/201816705007

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Abstract

In order to reveal the quantitative control of the residual stress on the surface of metal materials, the relevant theoretical and experimental studies were carried out to investigate the dynamic response of metal thin plates and the formation mechanism of residual stress induced by laser shock wave. In this paper, the latest research trends on the surface residual stress of laser shock processing technology were elaborated. The main progress of laser shock wave propagation mechanism and dynamic response, laser shock, and surface residual stress were discussed. It is pointed out that the multi-scale characterization of laser and material, surface residual stress and microstructure change is a new hotspot in laser shock strengthening technology.

Highlights

Laser shock processing (LSP) is widely used for surface modification of metallic materials owing to its characteristics like high strain rate and high pressure
Compared with the traditional mechanical strengthening technology such as shot blasting and sand blasting, the laser shock processing technology has the advantages of deep impact layer, controllable impact area and pressure, easy to maintain the surface roughness and dimensional accuracy and so on, which has a tremendous technical advantage in quantitative control surface residual stress
It is a research front and crucial for the current laser shock processing technology to understand the quantitative control of the residual stress on the surface of metal materials and breaking the conventional technology research of the impact of laser shock processing parameters on the material residual stress

Summary

Introduction

Laser shock processing (LSP) is widely used for surface modification of metallic materials owing to its characteristics like high strain rate and high pressure. Compared with the traditional mechanical strengthening technology such as shot blasting and sand blasting, the laser shock processing technology has the advantages of deep impact layer, controllable impact area and pressure, easy to maintain the surface roughness and dimensional accuracy and so on, which has a tremendous technical advantage in quantitative control surface residual stress. It is a research front and crucial for the current laser shock processing technology to understand the quantitative control of the residual stress on the surface of metal materials and breaking the conventional technology research of the impact of laser shock processing parameters on the material residual stress. It is pointed out that the multi-scale characterization of laser and material, surface residual stress and microstructure change is the current research hotspot

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Results

Conclusion