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Study on the Distribution of Residual Stresses for Nondestructive Marking by Laser Shock Wave

Journal Key Engineering Materials (Volumes 426 - 427)
Volume Functional Manufacturing Technologies and Ceeusro I
Edited by Dunwen Zuo, Hun Guo, Guoxing Tang, Weidong Jin, Chunjie Liu and Chun Su
Pages 454-457
DOI 10.4028/www.scientific.net/KEM.426-427.454
Citation Jin Zhon Lu et al., 2010, Key Engineering Materials, 426-427, 454
Online since January, 2010
Authors Jin Zhon Lu, Kai Yu Luo, P.P. Yuan, Su Min Yin, Yong Kang Zhang
Keywords Laser Marking, Laser Shock Wave, Liquid Crystal Mask, Nondestructive, Residual Stress
Abstract

The marking system by laser shock wave (LSW) based on liquid crystal mask, which differs entirely from marking by laser ablation (or laser thermal effect), was established. Two-dimension (2D) nondestructive markings based on liquid crystal mask were prepared by LSW, and the distribution of residual stresses in laser-shocked region was measured and analyzed. The results showed that tensile residual stresses of sample surface were converted into compressive residual stresses by LSW, which is a nondestructive marking for aviation key parts.

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