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

Yang, Chunhui, Hodgson, Peter, Liu, Qianchu and Ye, Lin 2007, Geometrical effects on residual stresses in 7050-T7451 aluminum alloy rods subject to laser shock peening, in AMPT 2007 : 10th International Conference on Advances in Materials and Processing Technologies, Daejeon, Korea, 07-11 October 2007, Elsevier, Amsterdam, The Netherlands, pp. 709-718, 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
Liu, Qianchu
Ye, Lin
Conference name International Conference on Advances in Materials and Processing Technologies (10th : 2007 : Daejeon, Korea)
Conference location Daejeon, Korea
Conference dates 7-11 October 2007
Title of proceedings AMPT 2007 : 10th International Conference on Advances in Materials and Processing Technologies, Daejeon, Korea, 07-11 October 2007
Publication date 2007
Series Journal of materials processing technology
Start page 709
End page 718
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
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 091299 Materials Engineering not elsewhere classified
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
Copyright notice ©2007, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30014891

Document type: Conference Paper
Collection: School of Engineering and Information Technology
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