文献类型：期刊文献

中文题名：钛合金蠕变损伤的非线性Lamb波检测

英文题名：Evaluation of creep damage in Ti60 alloys by nonlinear Lamb waves

作者：叶有俊[1];朱武军[2];王一宁[1];项延训[2]

机构：[1]江苏省特种设备安全监督检验研究院,江苏南京210036;[2]华东理工大学承压系统与安全教育部重点实验室,上海200237

年份：2016

卷号：35

期号：4

起止页码：345

中文期刊名：声学技术

外文期刊名：Technical Acoustics

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：国家自然科学基金项目(11474093);上海市科技启明星计划资助项目(14QA1401200)

语种：中文

中文关键词：非线性Lamb波;二次谐波;蠕变损伤

外文关键词：nonlinear Lamb waves; second-harmonic generation; creep damage

摘要：金属材料在高温高压服役过程中会发生蠕变损伤,检测和评价金属材料的早期蠕变损伤具有重要工程意义。针对Ti60钛合金蠕变损伤采用非线性Lamb波进行检测,分别选择Lamb波S_1-S_2模式对和A_4-S_8模式对开展钛合金蠕变损伤试样的实验测量,并采用归一化非线性参数来表征钛合金的蠕变损伤状态。研究结果表,明两种模式对的归一化非线性参数随着材料蠕变损伤程度的加剧均表现出"上升-下降"的变化趋势,且A_4-S_8模式对归一化非线性参数变化率比S_1-S_2模式对更大,说明该模式对对Ti60钛合金蠕变损伤更为敏感。
Creep induced damages occur when metallic materials are operated in the condition of elevated temperature and high pressure. It has an important engineering value to make an early test and evaluation of material creep damage. The present paper performs an in-depth analysis on the evaluation of creep damage of titanium alloy by nonlinear Lamb waves, in which Lamb mode pairs of S1-S2 and A4-S8 are conducted on creep damaged Ti60 plates. The norma- lized acoustic nonlinear parameter is proposed to characterize the creep damage state. A ＂mountain-shape＂ change in the normalized acoustic nonlinearity of Lamb wave versus the level of creep degradation in the Ti60 specimens has been observed both for Lamb mode pairs of S1S2 and A4-S8. The change rate of the normalized nonlinear parameter of Lamb mode pair A4-S8 is much greater than that of S1-S2, which means that Lamb mode pair A4-$8 is more sensitive to the creep damage of Ti60 alloys.