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Influence of boron-doping on the H2-induced environmental embrittlement of Ni3Fe intermetallics

Dan-Dan Shi, Ye-Xin Chen, Xiao-Jing Wan, Chain Tsuan Liu

Research output: Journal Publications and ReviewsRGC 22 - Publication in policy or professional journal

Abstract

In this paper the tensile properties of both ordered and disordered Ni-24Fe and Ni-24Fe-0.03%B (wt%) alloys in gaseous hydrogen was investigated. The result shows that the ductility of the disordered Ni3Fe is significantly larger than that of ordered material in gaseous hydrogen. However, the ductility of ordered Ni3Fe doped with 0.03%B is nearly the same as that of disordered one indicating the obvious suppressing effect of boron on the H2-induced embrittlement. Based on the segregation behavior of boron in Ni3Al, it is proposed that the suppressing effect of boron in Ni3Fe on the H2-induced embrittlement is attributed to the segregation of boron on grain boundaries, thereby reducing the hydrogen diffusivity along the grain boundaries. © Shanghai University 2007.
Original languageEnglish
Pages (from-to)102-105
JournalJournal of Shanghai University
Volume11
Issue number2
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

Research Keywords

  • Boron addition
  • Hydrogen embrittlement
  • Ni3Fe alloy

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