Measurement of intergranular attack in stainless steel using ultrasonic energy.

摘要

The disclosure describes a unique combination of ultrasonic test methods to measure the depth of intergranular attack (IGA) in a stainless steel specimen (3). The ultrasonic test methods include a pitch-catch surface wave technique and a through-wall pulse-echo technique. When used in combination, these techniques can establish the extent of IGA on both the front (9) and back (10) surfaces of a stainless steel specimen from measurements made on only one surface.