Phased array provides many advantages over conventional ultrasonic testing method, but phased array has also limitations. This paper describes typical results of the experimental sound field analysis generated from the array probe. A photo-elastic ultrasonic visualization technique was applied in this study. The so und field of shear wave generated from the array probe was equivalent to that from the fixed angle probe....
英字タイトル:
Evaluation of Phased Array UT Conditions using Ultrasonic Visualization Technique

1．はじめにオーステナイト系ステンレス鋼配管突合せ溶接部のき裂深さサイジング技量に関して、（社）日本非破壊検査協会規格NDIS0603「超音波探傷試験システムの性 能実証における技術者の資格及び認証」附属書（規定）「軽水型原子力発電所用機器に対するPD資格試験」［1］（以下、NDIS0603と記す）が制定され、国内でもき裂深さサイジングの技量の指標（測定誤差の判定基準）が示された。一方で、発電用原子力設備の低炭素ステンレス鋼管における健全性評価においては、現時点ではUTで測定したき裂深さに4.4mmを加算......

This paper describes two contents about reliability of crack depth sizing on ultrasonic testing. One is verification with appropriate acceptance cr iteria of the Japanese Performance Demonstration Code (NDIS 0603 Appendix) . Another is investigation about the true crack depth measurement method....
英字タイトル:
Reliability of Crack Depth Sizing on Ultrasonic Testing

A partial-contact stress corrosion crack (SCC) is electrically modeled as a crack region with non-zero conductivity in eddy current testing (ECT). This partial-contact effect is excluded by an optimally designed crack-conductivity-insensitive depth sizing index, and consequently the master curves obtained from electric-discharge machining (EDM) notches can be utilized directly in the depth sizing of SCCs. This approach is numerically validated and applied to the characterization of SCCs in SUS304 from...
英字タイトル:
A New Depth Sizing Method for Partial-Contact Stress Corrosion Cracks from ECT Signals