Evaluation of fracture damage of SUS306 structural steel using ultrasonic testing

摘要

High frequency ultrasonic nondestructive testing was conducted using a direct contact method for SUS306 stainless steel treated by high temperature and fracture tensile tests.Reflected ultrasonic echoes were analyzed.The relationships between the ultrasonic attenuation coefficient,strength of backscattering wave and the elongation at break of the samples were obtained.The damages were evaluated by using these results together with the analysis of microstructure and mechanics of the tested material.