A technique to decrease surface roughness in overlapping laser shock peening

被引：48

作者：

Dai, Fengze ^{[1
,2
]}

Zhou, Jianzhong ^{[1
,2
]}

Lu, Jinzhong ^{[1
,2
]}

Luo, Xinmin ^{[1
,2
]}

机构：

[1] Jiangsu Univ, Sch Mech Engn, Xuefu Rd 301, Zhenjiang 212013, Peoples R China

[2] Jiangsu Key Lab Photon Mfg Sci & Technol, Zhenjiang 212013, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2016年 / 370卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Elastic contact laser shock peening; Surface roughness; Residual stress; RESIDUAL-STRESS FIELD; FATIGUE-CRACK GROWTH; CONFINED GEOMETRY; PLASMA; WAVES; STEEL; ALLOY;

D O I：

10.1016/j.apsusc.2016.02.138

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A technique called elastic contact laser shock peening (ECLSP) is presented in this paper. In this technique, a metal foil with high dynamic yield strength is fixed between absorbing layer and workpiece, and the peak pressure of laser shock wave is a little less than the dynamic yield strength of metal foil, but higher than the Hugoniot Elastic Limit (HEL) of work piece. Surface roughness, microhardness and residual stress are investigated. Compared with regular laser shock peening (LSP), ECLSP can reduce the depth and area of secondary plastic deformation of overlapping region. This can effectively reduce surface roughness in overlapping LSP. Measurement of microhardness and residual stress shows that the work hardening effects and strengthening effect are similar as regular LSP. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：501 / 507

页数：7

共 18 条

[1] Shock waves from a water-confined laser-generated plasma [J].