Microstructural and ultrasonic characterization of 2101 lean duplex stainless steel welded joint

摘要

In this paper, welded joint of a 2101 lean duplex stainless steel (DSS) was studied using ultrasonic attenuation measurements. Two plates were welded using gas metal arc welding (GMAW) process. Attenuation measurements were performed by the immersion ultrasonic pulse-echo technique using a high precision x, y, z scanner in order to generate c-scan images of the welded sample. Experimental measurements show that the longitudinal ultrasonic wave amplitude is significantly affected by the recrystallization of the microstructure caused by multi-pass welding.