Evaluation of metal weld-zone by using Poisson’s ratio distri bution

Poisson’s ratio has not received much attention because of its narrow range of measured values and difficulties in measurement. In previous work, genuine non-destructive evaluation method of characterizing weld-zone using Poisson’s ratio distribution was proposed. The method w as to use immersion ultrasonic testing for measuring longitudinal and transverse wave speeds simultaneously. I n present work, scanning results by focused transducer and normal transducer are compared. Focused transducer sho ws improved performance. We also compare the results by Poisson’s ratio scanning and direct Vickers har dness test.