A twin matrix array transducer to make possible to detect and measure a flaw with test direction through weld of austenitic stainless steel has been developed. Each transducer performs as transmitter and receiver and has 2 lines and 16 columns array elements respectively. With this transducer depth measurement tests for cracks by stress corrosion cracking (SCC) and fatigue on austenitic stainless steel weld pipe specimens have been carried out.As the results: (1) Corner echoes and ti p echoes from SCCs ...
英字タイトル:
Development of Depth Measurement Technique for a Flaw in Weld Area of Stainless Steel with Twin Matrix Array Ultrasonic Probe

Cast stainless steel is widely used for reactor coolant piping in pressurized water reactors (PWRs). Its complex crystal structure hinders accurate ultrasonic inspection. This is because the large attenuation and scattering noise due to the coars e grain structure interfere with defect detection, and the ultrasonic wave velocity variations and beam skewing resulting from the anisotropic crystal structure make the determination of defect locations inaccurate. In this study, a large apertur e twin crystal tr...
英字タイトル:
Ultrasonic Inspection of Cast Stainless Steel