QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY
Print ISSN : 0288-4771
Proposal of Guideline for Bonding to Prevention of Hydrogen Embrittlement at Ta/Zr Bond Interface
- Hydrogen Embrittlement in SUS304ULC/Ta/Zr Explosive Bonded Joint -
Kazuyoshi SAIDATetsuya FUJIMOTOKazutoshi NISHIMOTO
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2010 Volume 28 Issue 2 Pages 248-254

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Abstract

The occurrence condition of hydrogen embrittlement cracking at Ta/Zr bond interface was investigated with respect to the hydrogen content and applied stress in order to propose a guideline for the explosive bonding procedure to prevention of hydrogen embrittlement. Hydrogen charging test was conducted for SUS304ULC/Ta/Zr explosive bonded joints applied the different flexural strains. A hydrogen embrittlement crack occurred in the Zr substrate at Ta/Zr bond interface after hydrogen charging, and it was initiated at shorter charging times when the augmented strain was increased. The occurrence condition of hydrogen embrittlement cracking at Ta/Zr bond interface was shifted to lower stress and hydrogen content with an increase in the amount of explosive during bonding. It was suggested that hydrogen embrittlement in Ta/Zr explosive bonded joint could be inhibited by reducing the initial hydrogen content in Ta substrate less than approx. 5ppm.

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© 2010 by JAPAN WELDING SOCIETY
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