| Residual stress profiling of an aluminum alloy by laser ultrasonics |
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| 作者姓名： | PANYondong QIANMenglu XUWeijiang M.OURAK |
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| 作者单位： | [1]InstituteofAcoustics,TongjiUniversityShanghai200092 [2]D.O.A.E.,UniversitedeValenciennesBP311,59304Valenciennes,France |
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| 基金项目： | This work was supported by the PRA MXOO-02 and the National Natural Foundation of China (10134020 and 10174052). |
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| 摘 要： | A residual-stress profile along the thickness of an aluminum alloy sheet is determined by laser-ultrasonic technique. Surface acoustic waves are generated by a Nd:YAG pulse laser and detected by a Heterodyne interferometer on a lateral free surface of the sheet. The distribution of residual stress is determined by measuring the relative variation of the wavevelocities at different location of the sample along its thickness. This technique is validated by three different residual stress profiles obtained experimentally.
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| 关 键 词： | 铝合金 残余应力剖面 激光超声技术 声表面波 激光脉冲 外差干涉计 |
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