Intrinsic ductility of FeAl single crystals

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)77-81
Journal / PublicationIntermetallics
Volume3
Issue number1
Publication statusPublished - 1995
Externally publishedYes

Abstract

The room-temperature ductility of FeAl is significantly reduced by environmental embrittlement caused by the water vapor present in air. Since Fe-rich FeAl can fail by either transgranular or intergranular fracture in both wet and dry environments, the relative effects of the environment on grain boundaries versus the grain interior are not known and warrant study. In this investigation, the effect of test environment on the tensile properties of single crystals of Fe-40Al was studied in order to eliminate the effects of grain boundaries. It was found that the single crystals exhibited significantly higher room-temperature ductilities when tested in a moisture-free environment, although {001} cleavage fracture initiation remained the same as for samples tested in air. At the 40 at% Al level, the degree of environmental embrittlement in the single crystals was similar to that observed in fine-grained binary polycrystals and B-doped polycrystals. © 1994.

Research Area(s)

  • ductility, environmental embrittlement, fracture, iron aluminides

Citation Format(s)

Intrinsic ductility of FeAl single crystals. / Nathal, M. V.; Liu, C. T.

In: Intermetallics, Vol. 3, No. 1, 1995, p. 77-81.

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