| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1653392 | Materials Letters | 2006 | 5 Pages |
Abstract
This paper reports that the ultrasonic methods can be used to accurately characterize forged reactor vessels. The Charpy V-notch impact tests were conducted on the respective specimens with three different types of heat history. Various test results including fracture appearance transition temperature (FATT) were obtained. A pulse-echo method with longitudinal waves was used to measure attenuation and velocity of ultrasonic wave. The velocity was measured repeatedly nine times on each specimen. The attenuation coefficient of the ultrasonic wave changed with heat treatment temperature and conditions (as-quenched, tempered, PWHT). The fracture appearance transition temperature can be predicted using the ultrasonic characteristics.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Young Hyun Nam, Yong-Il Kim, Seung Hoon Nahm,