论文部分内容阅读
由于奥氏体焊缝中材料性能的各向异性和微观组织结构的不同,奥氏体焊缝的超声波检测是非常困难的。超声波在奥氏体焊缝中会沿金属结晶方向发生偏转,并在焊缝边界上发生散射。过去十年来,人们开发了多种模拟各向异性材料中声波传播的仿真工具。本文则以常规超声波检测方法为基础,将声线跟踪法和弹性动力学有限积分技术(EFIT)相结合,应用于含晶间应力腐蚀裂纹的厚壁奥氏体焊缝中,其结果显示声线跟踪法和弹性动力学有限积分技术(EFIT)结合应用,有助于超声波检测参数的选取。
Ultrasonic testing of austenitic welds is very difficult due to the anisotropy of the material properties and the microstructure of the austenitic weld. Ultrasound in the austenitic weld metal along the direction of crystallization will be deflected, and in the weld boundary scattering. Over the past decade, a number of simulation tools have been developed that simulate the propagation of acoustic waves in anisotropic materials. This article is based on conventional ultrasonic testing method, the combination of acoustic ray tracing method and finite element method (EFIT), which is applied to the thick-walled austenitic weld with intercrystalline stress corrosion cracking, the results show that the sound The combination of line tracking method and finite element method (EFIT) is helpful to the selection of ultrasonic testing parameters.