Residual stress profiling of an aluminum alloy by laser ultrasonics

• 来源期刊: 声学学报（英文版）
• 年，卷（期）: 2004,（1）
• 页码范围: 11-16
• 页数: 6页
• 语种: 英文

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.