کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
795557 1466765 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geometrical effects on residual stresses in 7050-T7451 aluminum alloy rods subject to laser shock peening
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Geometrical effects on residual stresses in 7050-T7451 aluminum alloy rods subject to laser shock peening
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 201, Issues 1–3, 26 May 2008, Pages 303–309
نویسندگان
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