Strength proof evaluation of diffusion-jointed W/Ta interfaces by small punch test

Jing Feng Li, Masayoshi Kawai, Kenji Kikuchi, Tadashi Igarashi, Hiroaki Kurishita, Ryuzo Watanabe, Akira Kawasaki

研究成果: Article査読

19 被引用数 (Scopus)

抄録

For the development of tantalum-clad tungsten targets for spallation neutron sources, the bonding strength of tantalum-tungsten interface was investigated by means of an easy-to-use and miniaturized small punch (SP) test, in which a punching load is vertically applied to the center of a jointed disk. Cracks initiated and propagated in the tungsten side for all the samples hot-isostatically pressed (HIPed) at temperatures from 1673 to 2073 K, whereas no crack and debonding were observed in the interface, indicating that the jointed interface is strongly bonded. The recrystallization of tungsten occurs and results in its strength reduction, consequently the crack-initiating load decreases with HIPing temperature. The finite element analysis of the measured SP testing results shows that the maximum bonding strength can exceed 1000 MPa. The present study shows that SP test is suitable for the strength evaluation of jointed tantalum-tungsten interfaces.

本文言語English
ページ(範囲)129-134
ページ数6
ジャーナルJournal of Nuclear Materials
321
2-3
DOI
出版ステータスPublished - 2003 9月 15
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

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