Evaluation of Material Degradation Using Electrical Resistivity Method

Title & Authors
Evaluation of Material Degradation Using Electrical Resistivity Method
Seok, Chang-Seong; Kim, Dong-Jung; Bae, Bong-Guk;

Abstract
The remaining life estimation for the aged components in power plants as well as chemical plants are very important beacuse mechanical properties of the components are degraded with time of service exposure in high temperature. Since it is difficult to take specimens from the operating components to evaluate mechanical properties of components nondestructive techniques are needed to estimate the degradation. In this study, test materials with 4 different degradation levels were prepared by isothermal aging heat treatment at 630$\small{\^{C}}$. And the DC potential drop method and destructive methods such as tensile, K(sub)IC and hardness tests were used in order to evaluate the degradation of 1-Cr-1Mo-0.25V steels. The objective of this study is to investigate the possibility of the application of DCPD method to estimated the material degradation, and to analyse the relationship between the electrical relationship between the electrical resistivity and the degree material degradation.
Keywords
Language
Korean
Cited by
1.
초음파 계측에 의한 2.25Cr-1Mo강의 열화도 평가에 관한 연구,박은수;박익근;김정석;

한국공작기계학회논문집, 2001. vol.10. 3, pp.61-67
2.
전기비저항법을 이용한 재료열화 평가,석창성;김동중;배봉국;

대한기계학회논문집A, 2000. vol.24. 12, pp.2995-3002
3.
Evaluation of Material Degradation of 1Cr-1Mo-0.25V steel using Ball Indentation Method,;;;

Journal of Mechanical Science and Technology, 2004. vol.18. 10, pp.1730-1737
4.
DC Potential Drop Method for Evaluating Material Degradation,;;;

Journal of Mechanical Science and Technology, 2004. vol.18. 8, pp.1368-1374
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