Micromechanics of hydride formation and cracking in zirconium alloys

J. Lufrano, P. Sofronis

研究成果: ジャーナルへの寄稿学術誌査読

13 被引用数 (Scopus)

抄録

Transient hydrogen diffusion and hydride formation coupled with material deformation are studied in Zr-2.5Nb alloys used in the pressure tubes of CANDU nuclear generating stations. The energetics of the hydride formation is revisited and the terminal solid solubility of hydrogen in solution is defined on the basis of the total elastoplastic work done on the system by the forming hydride and the external loads. Probabilistic precipitation of hydride is modeled in the neighborhood of a crack tip under mode I plane strain loading and a uniform initial hydrogen concentration below the stress free terminal solid solubility. Finite element analysis is used to monitor the local distribution and time evolution of hydrogen concentration, hydride volume fraction, stress, and strain as the externally applied loads increase. The mechanistic effects of the solute hydrogen and hydride formation on the stresses at the crack tip are analyzed and their consequence on the fracture toughness resistance of the material is determined.

本文言語英語
ページ(範囲)119-131
ページ数13
ジャーナルCMES - Computer Modeling in Engineering and Sciences
1
2
出版ステータス出版済み - 2000
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • ソフトウェア
  • コンピュータ サイエンスの応用
  • モデリングとシミュレーション

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