文献类型：期刊文献

中文题名：Evaluation of Thermal Degradation Induced Material Damage Using Nonlinear Lamb Waves

英文题名：Evaluation of Thermal Degradation Induced Material Damage Using Nonlinear Lamb Waves

作者：Xiang Yan-Xun[1];Xuan Fu-Zhen[1];Deng Ming-Xi[2]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, MOE, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China;[2]Logist Engn Univ, Dept Phys, Chongqing 400016, Peoples R China

年份：2010

卷号：27

期号：1

中文期刊名：Chinese Physics Letters

外文期刊名：CHINESE PHYSICS LETTERS

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000273639000051)】；CSCD:【CSCD2011_2012】；

基金：Supported by the National Natural Science Foundation of China under Grant Nos 50835003 and 10674180, the Program for NCET under Grant No 06-0414 and the Shanghai Leading Academic Discipline Project (No B503).

语种：英文

中文关键词：Chinese climate network;complex systems;small world;community

摘要：We report on the evaluation of thermal degradation damage in metal material using the nonlinear effect of Lamb wave propagation. A mountain-shape＇＇ change in the second harmonic of Lamb wave propagation versus the level of thermal degradation in the specimens is observed. It is attributed to the precipitations in the early stage and the microvoids after long-term service in terms of metallographic studies. The results show that the nonlinear Lamb wave is very sensitive to the microstructure evolution and is a good potential for quantitative evaluation of the thermal damaged materials.
We report on the evaluation of thermal degradation damage in metal material using the nonlinear effect of Lamb wave propagation. A "mountain-shape" change in the second harmonic of Lamb wave propagation versus the level of thermal degradation in the specimens is observed. It is attributed to the precipitations in the early stage and the microvoids after long-term service in terms of metallographic studies. The results show that the nonlinear Lamb wave is very sensitive to the microstructure evolution and is a good potential for quantitative evaluation of the thermal damaged materials.