Influence of pulse sequence and edge material effect on fatigue life of Al2024-T351 specimens treated by laser shock processing

被引：61

作者：

Correa, C. ^{[1
]}

Ruiz de lara, L. ^{[1
]}

Diaz, M. ^{[1
]}

Porro, J. A. ^{[1
]}

Garcia-Beltran, A. ^{[1
]}

Ocana, J. L. ^{[1
]}

机构：

[1] Univ Politecn Madrid, Ctr Laser, Madrid, Spain

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2015年 / 70卷

关键词：

Laser shock processing; Residual stress; Fatigue; Pulse sequence; Edge effect; RESIDUAL-STRESS; IRRADIATION; SIMULATION; SURFACE; ALLOY;

D O I：

10.1016/j.ijfatigue.2014.09.015

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Laser shock processing (LSP) is being considered as a competitive alternative technology to classical treatments for improving fatigue, corrosion cracking and wear resistance of metallic materials. The purpose of this paper is to present a fully 3D finite element model for predicting the residual stresses that result from the LSP of aluminum alloy Al2024-T351 samples of interest for aeronautic industry in order to optimize the laser treatment to increase the fatigue life of the material. In order to correlate the simulation results with experimental data, three different laser shock processing strategies (pulse sequences) were performed on fatigue specimens and their fatigue life were compared. The starting points of cracks were identified by means of optical and scanning electron microscope examinations and a correlation with the maximum tensile stress regions predicted by the numerical model has been established. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：196 / 204

页数：9

共 21 条

[1] Eigenstrain modelling of residual stress generated by arrays of laser shock peening shots and determination of the complete stress field using limited strain measurements [J].