Low temperature embrittlement of Ni3(Si, Ti) alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)309-318
Journal / PublicationIntermetallics
Volume4
Issue number4
Publication statusPublished - 1996
Externally publishedYes

Abstract

Three ternary Ll2 Ni3(Si,Ti) alloys were tensile tested in various environments at room temperature to evaluate the effect of stoichiometry on the severity of hydrogen embrittlement. In addition, three quaternary alloys, each containing 1 at% Cr were also similarly tested to verify previously reported beneficial effects of the Cr addition. The embrittlement sensitivity to hydrogen partial pressure was studied. The results of this study showed that the severity of embrittlement is strongly dependent on alloy stoichiometry, that Cr addition does not provide any direct benefit, that embrittlement is a function of the hydrogen partial pressure in the environment, and that molecular hydrogen dissociation is more critical than water vapor dissociation. Based on the data, it is argued that hydrogen 'wetting' of the crack tip and hydrogen penetration play a role in embrittling the alloys, the relative importance being stoichiometry-dependent. Copyright © 1996 Elsevier Science Ltd.

Research Area(s)

  • A. Silicides (various), B. Hydrogen (i.e.environmental) embrittlement, B. Mechanical properties at ambient temperature

Citation Format(s)

Low temperature embrittlement of Ni3(Si, Ti) alloys. / Kumar, K. S.; Liu, C. T.; Wright, J. L.

In: Intermetallics, Vol. 4, No. 4, 1996, p. 309-318.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review