Numerical modeling and simulation for ultrasonic inspection of anisotropic austenitic welds using the mass-spring lattice model

This paper deals with two-dimensional numerical modeling and simulation of ultrasonic nondestructive testing of austenitic welds, which are assumed to be homogeneous and transversely isotropic. The numerical computer model used in this work is the rectangular mass-spring lattice model (RMSLM). The model’s capability has first been investigated for accurately simulating ultrasonic waves in the austenitic weld medium. Compatible numerical models for transmitting probes ‘tailored’ for the austenitic weld have also been developed so that incident waves can be sent precisely in desired directions. A two-dimensional numerical simulator, consisting of the probe models and the RMSLM, has been applied to realistic, typical ultrasonic testing problems of austenitic welds, and effective test setups for them have been found. This demonstrates the capability and usefulness of the simulator.

► Ultrasonic testing of anisotropic austenitic weld is numerically simulated. ► The mass-spring lattice model accurately simulates wave phenomena in austenitic weld. ► Tailored transducer models for austenitic weld are developed. ► Ultrasonic testing simulator for austenitic weld is developed and proves useful.