2000•Unpublished venueRequires access

ENVIRONMENTAL EMBRITTLEMENT OF Co_3Ti-BASED ALLOYS IN GASEOUS HYDROGEN

Yexin Chen

Abstract

The serious environmental embrittlement occured in Co3Ti and Co3Ti-Fe alloys when these materials were tested in hydrogen gas. The ductility of Co3Ti and Co3Ti-Fe alloy increases with the increase of strain rate, and the value of elongation of Co3Ti alloy is smaIler than that of Co3TiFe alloy at the same strain rate when tested in hydrogen gas. Fe can alleviate the embrittlement of Co3Ti alloy in gaseous hydrogen, but can not suppress it completely The mechanism of hydrogen embrittlement of Co3Ti alloy in gaseous hydrogen is different from that in air.

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Key concepts: Hydrogen embrittlement, Materials science, Embrittlement, Hydrogen, Alloy, Elongation, Metallurgy, Strain rate