Characterisation of Hydrogen Embrittlement Cracking at Ta/Zr Bond Interface and Hydrogen Embrittlement Mechanism of Zr Base Metal - Hydrogen Embrittlement in SUS304ULC/Ta/Zr Explosive Bonded Joint -

DOI 4 Citations 29 References

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Other Title
  • Ｔａ／Ｚｒ接合界面における水素脆化割れの特徴とＺｒ母材の水素脆化機構　　‐ＳＵＳ３０４ＵＬＣ／Ｔａ／Ｚｒ爆発接合継手の水素脆化に関する研究‐
  • Characterisation of Hydrogen Embrittlement Cracking at Ta/Zr Bond Interface and Hydrogen Embrittlement Mechanism of Zr Base Metal
  • - 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

In order to clarify the behaviour and mechanism of the hydrogen embrittlement in SUS304ULC/Ta/Zr explosive bonded joint, the hydrogen embrittlement cracking at Ta/Zr bond interface was characterised. Cracks occurred in the Zr substrate along the wavy interface of the hydrogen-charged Ta/Zr joint. The cracking susceptibility increased drastically when the potential of specimen during hydrogen-charging was reduced below the redox potential of hydrogen. γ-ZrH and δ-ZrH were precipitated in the hydrogen-charged Zr and the precipitated γ-ZrH possessed a (0002)α-Zr//(11-1)γ-ZrH, [21-1-0]α-Zr//[110]γ-ZrH crystallographic relationship. An in-situ observation of the hydrogen embrittlement cracking with SEM and TEM revealed that cracks were initiated in zirconium hydrides and propagated preferentially along zirconium hydrides. These results suggested that the hydrogen embrittlement mechanism of the Zr base metal was caused by the precipitation of zirconium hydrides and the brittle fracture of them.

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Details 詳細情報について

  • CRID
    1390001204726466048
  • NII Article ID
    10030150013
  • NII Book ID
    AN1005067X
  • DOI
    10.2207/qjjws.28.216
  • COI
    1:CAS:528:DC%2BC3cXpsl2js70%3D
  • ISSN
    24348252
    02884771
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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