Sonic IR Imaging of Micro-defects in Titanium Alloy

摘要：

High-power ultrasound can generate heat and therefore cause exceptional temperature increment in the defects in various materials. This temperature change, detected by an IR thermal imager, can help test the defects in the samples. Based on this working mechanism of sonic IR imaging, this paper made an empirical study on the testing of micro-defects in the samples made of TC4 (a kind of titanium alloy). Through finite-element computation, a transient temperature field analysis of the heat source excited by ultrasound in the defects is carried out. Result of the computation fit well with the result of the experiment, which indicates that sonic IR imaging is effective in detecting micro-defects in TC4 samples. The significance of this study lies in the fact that it is methodologically innovative and empirically valuable for providing a reference for NDT of micro-defects in titanium alloy.

作者: DUN Yi WU Ling Wang Shuan-jie Zhou Zhao-ying Liu Xiao-yan

作者单位: State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University,Beijin State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University,Beijin Mechanical Engineering College, Shijiazhuang, Hebei, 050003

会议类型: 国际会议

会议名称: The 6th International Conference on Physical and Numerical Simulation of Materials Processing(第六届材料与热加工物理模拟及数值模拟国际学术会议 ICPNS 2010)

会议地点: 桂林

会议语种:英文

页码: 1-6

在线出版日期: 2010-11-16（万方平台首次上网日期，不代表论文的发表时间）