The slow strain rate test technique was used to study several corrosion resistant alloys for susceptibility to hydrogen embrittlement (HE). Cathodic charging of tensile specimens undergoing slow strain rate extension produced hydrogen embrittlement of MONEL* alloy K-500 (UNS No. 5500) and INCOLOY* alloy 925 (UNS No. 9925) but not INCONEL* alloy 625 (UNS NO. 6625). The latter finding contrasts with results obtained by conventional testing of precharged tensile specimens. The effects of material condition on hydrogen embrittlement of INCOLOY alloy 925 could be assessed using the slow strain rate technique.

Subject
Test methods, Hydrogen embrittlement, Materials, Corrosion resistant alloys, Hydrogen charging, Cathodic charging, Corrosion losses, Elongation, Monel alloys, Aluminum alloys, Alloys, Slow strain rate technique, Hydrogen
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1986
Association for Materials Protection and Performance (AMPP)
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