Study on Characteristics of Stress and Parameters Influence in Microscale Laser Shock Peening

Abstract:

Microscale laser shock peening (μLSP) can generate beneficial compressive stress distribution in the targets, as the used beam diameter in μLSP is at the order of micron equivalent with grain size, the treated material must be considered as anisotropic and inhomogeneous, this causes an asymmetrical distribution of residual stress. In this paper, shape factor σSF was introduced and defined to characterize the asymmetrical distribution of stress, optimum conditions of factors and the influence degree were explored based on Taguchi design with the optimal object of stress characterization values. The results show that shape factor is a significant characteristic of residual stress induced by μLSP, crystal orientation is the most important influence factor, but laser energy and peening number have significant influence on stress characterization values.

• Periodical: Key Engineering Materials (Volume 464)
• Pages: 336-339
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.464.336
• Online since: January 2011
• Authors: Yu Jie Fan, Jian Zhong Zhou, Shu Huang, W. Wang, Deng Hui Wei, W. Zhu
• Keywords: Characterizing Technique, Compressive Residual Stress, Shape Factor, μLSP

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