Geometry distortion and residual stress of alternate double-sided laser peening of thin section component

2018 ◽  
Vol 251 ◽  
pp. 197-204 ◽  
Author(s):  
Yongxiang Hu ◽  
Ruoyu Yang ◽  
Dongyu Wang ◽  
Zhenqiang Yao
Keyword(s):  
Residual Stress ◽  
Thin Section ◽  
Laser Peening

scholarly journals Relaxation Behaviour of Laser Peening Residual Stress due to Mechanical Loading on Aluminum Alloy

2011 ◽  
Vol 60 (7) ◽  
pp. 617-623 ◽  
Author(s):  
Daisuke MIYASHITA ◽  
Kazuya TAKEDA ◽  
Shin-ich OHYA ◽  
Yuji SANO ◽  
Toshiyuki SAITO ◽  
...  
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Mechanical Loading ◽  
Laser Peening ◽  
Relaxation Behaviour

Influence of Laser Parameters on Residual Stress Field of AISI 304 Stainless Steel Induced by Laser Peening: A Finite Element Analysis

2006 ◽  
Author(s):  
Xiang Ling ◽  
Weiwei Peng
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Stainless Steel ◽  
Stress Field ◽  
Stress Corrosion ◽  
Compressive Stress ◽  
304 Stainless Steel ◽  
Laser Peening ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304

The present paper established a non-linear elastic-plastic finite element method to predict the residual compressive stress distribution induced by Laser Peening (LP) in the AISI 304 stainless steel. The two dimensional FEA model considered the dynamic material properties at high strain rate (106/s) and the evaluation of loading conditions. Effects of laser power density, laser spot size, laser pulse duration, multiple LP processes and one/two-sided peening on the compressive stress field in the stainless steel were evaluated for the purpose of optimizing the process. Numerical results have a good agreement with the measurement values by X-ray diffraction method and also show that the magnitude of compressive stress induced by laser peening is greater than the tensile welding residual stress. So, laser peening is an effective method for protecting weldments against stress corrosion crack. The above results provide the basis for studying the mechanism on prevention of stress corrosion cracking in weld joint of type 304 stainless steel by laser peening.

312 Impartment of compressive residual stress on materials surface by laser peening

2006 ◽  
Vol 2006.14 (0) ◽  
pp. 167-168
Author(s):  
Yuji SANO ◽  
Koichi AKITA ◽  
Kiyotaka MASAKI ◽  
Yasuo OCHI
Keyword(s):  
Residual Stress ◽  
Compressive Residual Stress ◽  
Laser Peening

D111 Residual Stress Improvement of Nickel Base Superalloy Alloy 706 by Laser Peening

2012 ◽  
Vol 2012.17 (0) ◽  
pp. 117-118
Author(s):  
Itaru CHIDA ◽  
Rie SUMIYA ◽  
Yomei YOSHIOKA ◽  
Daizo SAITO ◽  
Toru Sawa ◽  
...  
Keyword(s):  
Residual Stress ◽  
Nickel Base Superalloy ◽  
Laser Peening ◽  
Nickel Base ◽  
Base Superalloy

Effects of curved geometry on residual stress in laser peening

2013 ◽  
Vol 218 ◽  
pp. 71-79 ◽  
Author(s):  
Anoop Vasu ◽  
Ramana V. Grandhi
Keyword(s):  
Residual Stress ◽  
Laser Peening

Impact of plasticity generated by Rayleigh waves on the residual stress behavior of structural components subjected to laser peening

2015 ◽  
Vol 6 (1) ◽  
pp. 107-123 ◽  
Author(s):  
Anoop Vasu ◽  
Ramana V. Grandhi
Keyword(s):  
Residual Stress ◽  
Rayleigh Waves ◽  
Design Methodology ◽  
Laser Peening ◽  
Structural Components ◽  
Wave Mechanics ◽  
Content Type ◽  
Analytical Formulation ◽  
Increasing Trend ◽  
The Impact

Purpose – The impact of laser peening on curved geometries is not fully comprehended. The purpose of this paper is to explain the action of laser peening on curved components (concave and convex shapes for cylindrical and spherical geometries) by means of shock wave mechanics. Design/methodology/approach – An analytical formulation is derived based on the plasticity incurred inside the material and the results are compared with the prediction by numerical simulation. Findings – A near-linear relationship is observed between curvature and compressive residual stress; an increasing trend was observed for concave models and a decreasing trend was observed for convex models. The consistency in the analytical formulation with the simulation model indicates the behavior of laser peening for curved geometries. Originality/value – The differences observed in the residual stresses for spherical and cylindrical geometries are primarily due to the effect of Rayleigh waves. This paper illustrates the importance of understanding the physics behind laser peening of curved geometries.

The Role of Residual Stress Measurement in the Development of Laser Peening *

2003 ◽  
Vol 11 (4) ◽  
pp. 195-200 ◽  
Author(s):  
Michael R. Hill ◽  
Adrian T. DeWald ◽  
Jon E. Rankin ◽  
Matthew J. Lee
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Laser Peening
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