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Ultrasonic Phased Array Implementation of the Inside Diameter Creeping Wave Sizing Method
| 题名： | Ultrasonic Phased Array Implementation of the Inside Diameter Creeping Wave Sizing Method |
| 作者： | Arthur D. Watkins;Dennis C. Kunerth;J. Mark Davis;Timothy R. McJunkin; |
| 关键词： | creeping wave; focal law; phased array; ultrasonic46 - INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; DEFECTS; DETECTION; IMPLEMENTATION; MODE CONVERSION; SENSITIVITY; SHEAR; SIZE; ULTRASONIC WAVES |
| 摘要： | This paper describes a technique for implementing the ultrasonic inside diameter (ID) creeping wave technique for detection and sizing ID connected defects using a phased array ultrasonic system. The technique uses multiple focal laws to produce the examination modes. The first focal law is designed to create a shear wave nominally at the critical angle for mode conversion to a longitudinal wave at the ID of a part, thus creating a creeping wave. This focal law is focused at the ID to improve sensitivity. The rest of the laws are designed to create tandem sound paths that progress up a vertical surface directly above the focal point of the creeping wave generation point. When a defect on the inner surface is detected with the creeping wave, the height of the defect can be measured from the response of a set of tandem laws without readjusting the position of the probe. Results from standard one-inch long notches of varying depths are presented. |
| 报告类型： | 科技报告 |
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