文献类型：期刊文献

中文题名：Creep Damage Evaluation of Titanium Alloy Using Nonlinear Ultrasonic Lamb Waves

英文题名：Creep Damage Evaluation of Titanium Alloy Using Nonlinear Ultrasonic Lamb Waves

作者：Xiang Yan-Xun[1,2];Deng Ming-Xi[3];Xuan Fu-Zhen[1,2];Chen Hu[4];Chen Ding-Yue[4]

机构：[1]E China Univ Sci & Technol, Key Lab Pressure Syst & Safety MOE, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]Logist Engn Univ, Dept Phys, Chongqing 400016, Peoples R China;[4]Ningbo Special Equipment Inspect & Res Inst, Ningbo 315020, Zhejiang, Peoples R China

年份：2012

卷号：29

期号：10

中文期刊名：Chinese Physics Letters

外文期刊名：CHINESE PHYSICS LETTERS

收录：CSTPCD;;EI(收录号：20220711656667);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000309962700043)】；CSCD:【CSCD2011_2012】；

基金：Supported by the National Natural Science Foundation of China under Grant Nos 50835003, 10974256 and 11004056, and the National High Technology Research and Development Program of China (2012AA040106).

语种：英文

中文关键词：creep;microstructure;dislocation;

外文关键词：Acoustics - Acoustic wave propagation - Creep - Ultrasonic waves - Surface waves - Microstructure

摘要：The creep damage in high temperature resistant titanium alloys Ti60 is measured using the nonlinear effect of an ultrasonic Lamb wave.The results show that the normalised acoustic nonlinearity of a Lamb wave exhibits a variation of the"increase-decrease"tendency as a function of the creep damage.The influence of microstructure evolution on the nonlinear Lamb wave propagation has been analyzed based on metallographic studies,which reveal that the normalised acoustic nonlinearity increases due to a rising of the precipitation volume fraction and the dislocation density in the early stage,and it decreases as a combined result of dislocation change and micro-void initiation in the material.The nonlinear Lamb wave exhibits the potential for the assessment of the remaining creep life in metals.
The creep damage in high temperature resistant titanium alloys Ti60 is measured using the nonlinear effect of an ultrasonic Lamb wave. The results show that the normalised acoustic nonlinearity of a Lamb wave exhibits a variation of the "increase-decrease" tendency as a function of the creep damage. The influence of microstructure evolution on the nonlinear Lamb wave propagation has been analyzed based on metallographic studies, which reveal that the normalised acoustic nonlinearity increases due to a rising of the precipitation volume fraction and the dislocation density in the early stage, and it decreases as a combined result of dislocation change and micro-void initiation in the material. The nonlinear Lamb wave exhibits the potential for the assessment of the remaining creep life in metals.