Geometrical effects on residual stresses in 7050-T7451 aluminum alloy rods subject to laser shock peening

Yang, Chunhui, Hodgson, Peter Damian, Liu, Qianchu and Ye, Lin 2008, Geometrical effects on residual stresses in 7050-T7451 aluminum alloy rods subject to laser shock peening, Journal of materials processing technology, vol. 201, no. 1-3, pp. 303-309, doi: 10.1016/j.jmatprotec.2007.11.147.

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Title Geometrical effects on residual stresses in 7050-T7451 aluminum alloy rods subject to laser shock peening
Author(s) Yang, Chunhui
Hodgson, Peter Damian
Liu, Qianchu
Ye, Lin
Journal name Journal of materials processing technology
Volume number 201
Issue number 1-3
Start page 303
End page 309
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2008-05-26
ISSN 0924-0136
Keyword(s) LSP process
3-D FE modelling
residual stress
7050-T7451 aluminium alloy
Summary Laser shock peening (LSP) is an emerging surface treatment technology for metallic materials, which appears to produce more significant compressive residual stresses than those from the conventional shot peening (SP) for fatigue, corrosion and wear resistance, etc. The finite element method has been applied to simulate the laser shock peening treatment to provide the overall numerical assessment of the characteristic physical processes and transformations. However, the previous researchers mostly focused on metallic specimens with simple geometry, e.g. flat surface. The current work investigates geometrical effects of metallic specimens with curved surface on the residual stress fields produced by LSP process using three-dimensional finite element (3-D FEM) analysis and aluminium alloy rods with a middle scalloped section subject to two-sided laser shock peening. Specimens were numerically studied to determine dynamic and residual stress fields with varying laser parameters and geometrical parameters, e.g. laser power intensity and radius of the middle scalloped section. The results showed that the geometrical effects of the curved target surface greatly influenced residual stress fields.
Language eng
DOI 10.1016/j.jmatprotec.2007.11.147
Field of Research 091307 Numerical Modelling and Mechanical Characterisation
Socio Economic Objective 861206 Structural Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2008
Copyright notice ©2008, Elsevier
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