Evaluation of the heat-affected zone (HAZ) of a weld joint using nonlinear Rayleigh waves

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• 作者：Christoph Doerr^a ; Alexander Lakocy^a ; Jin-Yeon Kim^a ; Preet M. Singh^b ; James J. Wall^c ; ^d ; Jianmin Qu^e ; Laurence J. Jacobs^a ; ^d ; ^{laurence.jacobs@coe.gatech.edu}
• 关键词：Microstructure ; Welding ; Nonlinear ultrasonics ; Austenitic steels ; Sensitization
• 刊名：Materials Letters
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：190
• 期：Complete
• 页码：221-224
• 全文大小：850 K
• 卷排序：190

文摘

Demonstrate acoustic nonlinearity parameter, β is sensitive to microstructure. A 200% increase in the measured β in the heat-affected zone (HAZ). This increase in β is in the absence of sensitization. Induce additional microstructure changes to determine effect on β. Illustrate potential of nonlinear ultrasonics to monitor microstructure changes.