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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 238 - 248 (11page)
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초록· 키워드
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In the high-temperature and high-pressure irradiation environments, the multi-field coupling processes ofhydrogen diffusion, hydride precipitation and mechanical deformation in Zircaloy cladding tubes occur. Tosimulate this hydrogen-induced complex behavior, a multi-field coupling method is developed, with theirradiation hardening effects and hydride-precipitation-induced expansion and hardening effects involvedin the mechanical constitutive relation. The out-pile tests for a cracked cladding tube after irradiation aresimulated, and the numerical results of the multi-fields at different temperatures are obtained andanalyzed. The results indicate that: (1) the hydrostatic stress gradient is the fundamental factor to activatethe hydrogen-induced multi-field coupling behavior excluding the temperature gradient; (2) in the localcrack-tip region, hydrides will precipitate faster at the considered higher temperatures, which can befundamentally attributed to the sensitivity of TSSP and hydrogen diffusion coefficient to temperature. Themechanism is partly explained for the enlarged velocity values of delayed hydride cracking (DHC) at hightemperatures before crack arrest. This work lays a foundation for the future research on DHC.
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참고문헌 (42)
참고문헌 신청
L. J. Siefken / 2001 / MATPRO-A Library of Materials Properties for Light-water-reactor Accident Analysis / Idaho National Engineering and Environmental Laboratory
P. Shewmon / 1989 / Diffusion in Solids / The Minerals, Metals & Materials Society :246
C. E. Coleman / 1966 / The hydrogen embrittlement of a-zirconiumda review / J. Less Common Met 11(3):168~185
L. O. Jernkvist / 2014 / Multi-field modelling of hydride forming metals. Part I : model formulation and validation / Comput. Mater. Sci 85:363~382
C.E. Coleman / 2003 / Comprehensive Structural Integrity, 6 :103~161
P. Shewmon / 1989 / Diffusion in Solids / The Minerals, Metals & Materials Society :246
C. E. Coleman / 1966 / The hydrogen embrittlement of a-zirconiumda review / J. Less Common Met 11(3):168~185
L. O. Jernkvist / 2014 / Multi-field modelling of hydride forming metals. Part I : model formulation and validation / Comput. Mater. Sci 85:363~382
C.E. Coleman / 2003 / Comprehensive Structural Integrity, 6 :103~161
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