文献类型：期刊文献

英文题名：Creep degradation characterization of titanium alloy using nonlinear ultrasonic technique

作者：Xiang, Yanxun[1];Zhu, Wujun[1];Liu, Chang-Jun[1];Xuan, Fu-Zhen[1];Wang, Yi-Ning[2];Kuang, Wen-Chuan[3]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, MOE, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[2]Special Equipment Safety Supervis Inspect Inst Ji, Nanjing 211178, Jiangsu, Peoples R China;[3]Shanghai Volkswagen Automot Corp Ltd, Shanghai 201805, Peoples R China

年份：2015

卷号：72

起止页码：41

外文期刊名：NDT & E INTERNATIONAL

收录：;EI(收录号：20151100643777);WOS:【SCI-EXPANDED(收录号:WOS:000353178700006)】；

基金：This work is supported by National Natural Science Foundations of China (grant nos. 51325504 and 11474093), Shanghai Rising-Star Program (grant no. 14QA1401200) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Nonlinear ultrasonics; Titanium alloys; Creep degradation; Precipitation; Dislocations

摘要：A through transmission nonlinear ultrasonic measurement has been proposed to characterize the creep degradation of titanium alloy that was conducted by creep tests at temperature of 600 degrees C. The experimental results show a change of "N"-like shape of the acoustic nonlinearity versus the creep loading time, which reveal based on metallographic studies that the variation of acoustic nonlinearity is closely related to the microstructure evolutions. An analytical model calculation has revealed a good agreement with the measured result, which indicates that the precipitate-dislocation interaction is likely the dominant mechanism responsible for the change of acoustic nonlinearity in the crept materials. (C) 2015 Elsevier Ltd. All rights reserved.