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Vol.40, No.8, 853 ~ 861, 2002
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| Title |
| Research Papers / Mechanical Behaviors : AE Behavior and Fractography during Fatigue Crack Propagation in SWS 490B Steel |
| 정중채Jung Chae Jeong,윤동진Dong Jin Yoon,박휘립Phi Lip Park,김기복Ki Bok Kim,이승석Seung Seok Lee |
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| Abstract |
| The objective of this study was to investigate the effect of AE activities during fatigue test. Laboratory experiment was carried out to identify AE characteristics of fatigue cracks for compact tension specimen. The relationship between a stress intensity factor and AE signals activity was discussed. From the experimental results, the features of specific parameters such as the length of crack growth, the AE energy and the AE peak amplitude, showed similar trend in their increase as the stress intensity factor increased. The fracture surface of test specimens revealed both intergranular fracture and transgranular fracture. Size and density of slip band were varied as the stress intensity factor increased and AE activities were different according to the slip band shape. |
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| Key Words |
| Acoustic emission , Slip band , Fatigue crack , SWS 490B |
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