SCC evaluation of candidate container alloys by DCB method

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The authors use a solid mechanics approach to investigate hydride formation and cracking in zirconium-niobium alloys used in the pressure tubes of CANDU nuclear reactors. In this approach, the forming hydride is assumed to be purely elastic and its volume dilation is accommodated by elasto-plastic deformation of the surrounding matrix material. 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 elasto-plastic work done on the system by the forming hydride and the external loads. Hydrogen diffusion and probabilistic hydride formation coupled with the material ... continued below

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Roy, A.K.; Freeman, D.C.; Lum, B.Y. & Spragge, M.K. September 24, 1999.

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The authors use a solid mechanics approach to investigate hydride formation and cracking in zirconium-niobium alloys used in the pressure tubes of CANDU nuclear reactors. In this approach, the forming hydride is assumed to be purely elastic and its volume dilation is accommodated by elasto-plastic deformation of the surrounding matrix material. 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 elasto-plastic work done on the system by the forming hydride and the external loads. Hydrogen diffusion and probabilistic hydride formation coupled with the material deformation are modeled at a blunting crack tip under plane strain loading. A full transient finite element analysis allows for numerical monitoring of the development and expansion of the hydride zone as the externally applied loads increase. Using a Griffith fracture criterion for fracture limitiation, the reduced fracture resistance of the alloy can be predicted and the factors affecting fracture toughness quantified.

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  • Corrosion/2000 Conference, Orlando, FL (US), 03/26/2000--03/31/2000

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  • Report No.: UCRL-JC--135975
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 750368
  • Archival Resource Key: ark:/67531/metadc709743

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  • September 24, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • Sept. 25, 2017, 4:34 p.m.

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Roy, A.K.; Freeman, D.C.; Lum, B.Y. & Spragge, M.K. SCC evaluation of candidate container alloys by DCB method, article, September 24, 1999; California. (digital.library.unt.edu/ark:/67531/metadc709743/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.