Computer Simulation of Hydrogen Diffusion and Hydride Precipitation at Ta/Zr Bond Interface - Hydrogen Embrittlement in SUS304ULC/Ta/Zr Explosive Bonded Joint -

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  • Ｔａ／Ｚｒ接合界面における水素拡散および水素化物析出の計算機シミュレーション　　‐ＳＵＳ３０４ＵＬＣ／Ｔａ／Ｚｒ爆発接合継手の水素脆化に関する研究‐
  • Computer Simulation of Hydrogen Diffusion and Hydride Precipitation at Ta/Zr Bond Interface
  • - Hydrogen Embrittlement in SUS304ULC/Ta/Zr Explosive Bonded Joint -
  • －SUS304ULC/Ta/Zr爆発接合継手の水素脆化に関する研究－

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Abstract

The concentration of hydrogen and precipitation of zirconium hydrides in Ta/Zr explosive bonded joint were analysed by computer simulation. Numerical model of hydride precipitation under hydrogen diffusion was simplified by the alternate model coupled the macroscopic hydrogen diffusion with the microscopic hydride precipitation. Effects of the initial hydrogen content in Ta, working degree of Zr and post-bond heat treatment on the hydrogen diffusion and hydride precipitation were investigated. Hydrogen was rapidly diffused from Ta substrate into Zr after explosive bonding and temporarily concentrated at Ta/Zr bond interface. Zirconium hydrides were precipitated and grew at Ta/Zr bond interface, and the precipitation zone of hydrides was enlarged with the lapse of time. The precipitation of zirconium hydrides was promoted when the initial hydrogen content in Ta and working degree of Zr were increased. The concentration of hydrogen and precipitation of hydrides at the bond interface were reduced and diminished by post-bond heat treatment at 373K. It was deduced that hydrogen embrittlement in Ta/Zr explosive bonded joint was caused by the precipitation of zirconium hydrides and concentration of hydrogen at Ta/Zr bond interface during the diffusion of hydrogen containing in Ta substrate.

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Details 詳細情報について

  • CRID
    1390001204726460544
  • NII Article ID
    10030150066
  • NII Book ID
    AN1005067X
  • DOI
    10.2207/qjjws.28.236
  • ISSN
    24348252
    02884771
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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