A finite element analysis of thermal relaxation of residual stress in laser shock processing Ni-based alloy GH4169

被引：56

作者：

Ren, X. D. ^{[1
]}

Zhan, Q. B. ^{[1
]}

Yuan, S. Q. ^{[2
]}

Zhou, J. Z. ^{[1
]}

Wang, Y. ^{[2
]}

Ren, N. F. ^{[1
]}

Sun, G. F. ^{[1
]}

Zheng, L. M. ^{[1
]}

Dai, F. Z. ^{[1
]}

Yang, H. M. ^{[1
]}

Dai, W. J. ^{[1
]}

机构：

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

[2] Jiangsu Univ, Res Ctr Fluid Machinery Engn & Tech, Zhenjiang 212013, Peoples R China

来源：

MATERIALS & DESIGN | 2014年 / 54卷

基金：

中国国家自然科学基金;

关键词：

Ni-based alloy; Laser shock processing; Residual stress; Thermal relaxation; Finite element analysis; HIGH-TEMPERATURE;

D O I：

10.1016/j.matdes.2013.08.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The residual stress induced by laser shock processing and the thermal relaxation behaviors of residual stress in Ni-based alloy GH4169 were investigated by means of three-dimensional nonlinear finite element analysis. To study the effect of different given exposure time and different temperatures on residual stress in laser shock processing Ni-based alloy GH4169, Johnson-Cook material model was used in order to account for the nonlinear constitutive behavior. The influence of heating temperature and exposure time on the stress thermal relaxation was studied. It was concluded that stress relaxation mainly occured during the initial period of exposure, and the degree of relaxation increased as the temperature risen. The results would provide a theoretical basis for controlling the laser shock processing and guiding subsequent experiments. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：708 / 711

页数：4

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