Stability of residual stress induced by laser peening under cyclic mechanical loading
| Autor: | Toshiyuki Saito, Yuji Sano, Chihiro Narazaki, Rie Sumiya, Kazuya Takeda, Toshiyuki Tazawa, Koichi Akita |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Mechanical Engineering Laser peening Alloy Metallurgy chemistry.chemical_element engineering.material Shot peening Stress (mechanics) chemistry Mechanics of Materials Residual stress Aluminium engineering Compression (geology) Austenitic stainless steel Civil and Structural Engineering |
| Zdroj: | International Journal of Structural Integrity. 2:42-50 |
| ISSN: | 1757-9864 |
| DOI: | 10.1108/17579861111108608 |
| Popis: | PurposeThe purpose of this paper is to investigate the behavior of compressive residual stress induced by laser peening under external loading on an age‐hardened high‐strength aluminum alloy A2024‐T3, a low‐carbon austenitic stainless steel SUS316L (Type 316L) and a nickel‐based alloy NCF600 (Alloy 600).Design/methodology/approachThe surface residual stress was measured intermittently by X‐ray diffraction during cyclic uniaxial loading.FindingsThe compressive residual stress due to laser peening significantly decreased during the first few cycles at stress ratio of 0.1 with the maximum loading stress exceeding the 0.2 per cent yield stress. No remarkable decrease was observed afterward until the end of the loading cycles.Originality/valueUnder symmetric loading at the stress ratio of −1 to A2024‐T3, a major decrease took place in the compression side of the first loading cycle. The surface residual stresses remained in compression within all the extent of the present experiments, even if the maximum loading stress exceeded the yield stress of the materials. |
| Databáze: | OpenAIRE |
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