کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
778214 1463753 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of advancing direction on fatigue life of 316L stainless steel specimens treated by double-sided laser shock peening
ترجمه فارسی عنوان
تأثیر جهت پیشروی در عمر خستگی نمونه های فولاد ضد زنگ 316 لی با شیب لیزری دو طرفه
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Simulations explain the influence of advancing direction on residual stresses.
• Fatigue life in laser peened stainless steel 316L specimens can be increased (+471%) by optimizing the pulse sequence.
• 3D FEM model allows to simulate massive parallel LSP over real geometries.
• Good match between simulations and experimental results.

Laser shock peening (LSP) is considered as a well-established technology for inducing compressive residual stresses under the surface of metallic components. As a result, fatigue life is increased and the material becomes more resistant to corrosion and wear. This paper studies the effect of a significant parameter of LSP, the advancing direction of the laser scanning pattern, on the induced residual stress fields and the fatigue life of stainless steel 316L samples using experiments and 3D finite element analysis. The chosen material is of interest for nuclear and biomedical applications. Two different laser shock processing strategies (two different pulse sequences varying the advancing direction) were performed on the specimens. Their fatigue lives were compared revealing the decisive role played by the advancing direction of the treatment and the generated residual stresses. Fatigue life in laser peened specimens was increased from +166% to +471% by optimizing the pulse sequence. This improvement is explained by stress–strain analysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 79, October 2015, Pages 1–9
نویسندگان
, , , , , ,