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Modeling of hydrogen diffusion process at a blunt notch in zirconium
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作者 xingqiao ma Sanqiang Shi +2 位作者 Senyang Hu Chungho Woo Longqing Chen 《Journal of University of Science and Technology Beijing》 CSCD 2005年第5期416-421,共6页
The two-dimensional diffusion of interstitial hydrogen atoms in zirconium in a non-uniform stress field was simulated using the phase-field method. The interaction between hydrogen interstitials and the stress field w... The two-dimensional diffusion of interstitial hydrogen atoms in zirconium in a non-uniform stress field was simulated using the phase-field method. The interaction between hydrogen interstitials and the stress field was described by Khachaturyan's elastic theory. The Cahn-Hilliard diffusion equation was then solved by an explicit finite difference method. The result shows that hydrogen atoms diffuse to the high-tensile hydrostatic region near the tip of the notch. The content of hydrogen near the tip of the notch increases by 13%, while the stress distribution caused by hydrogen interstitials around the notch is modified by only 0.7%. 展开更多
关键词 PHASE-FIELD HYDROGEN diffusion non-uniform applied stress ZIRCONIUM
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