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Hydrogen Degradation of Fe-Mn-Al Alloys
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Abstract
The effect of electrolytic hydrogen charging on Fe-Mn-Al alloys with fully austenitic and ferrite-austenite dual phase structures was studied. Little degradation of tensile properties was observed on precharged tensile specimens. With dynamic charging, the degradation of tensile properties of the alloys was evident. The hydrogen assisted cracking in fully austenitic alloy initiated at surface and propagated into the specimen mainly along the grain boundaries with some surface grains fractured transgranularly. In ferrite-austenite dual phase alloy, the crack was either along the ferrite-austenite grain boundary or through the ferrite grains. The most favorable crack path was the chain of ferrite grains situated along the austenite grain boundaries. The austenite grains were relatively resistant to hydrogen assisted cracking.
Title: Hydrogen Degradation of Fe-Mn-Al Alloys
Description:
Abstract
The effect of electrolytic hydrogen charging on Fe-Mn-Al alloys with fully austenitic and ferrite-austenite dual phase structures was studied.
Little degradation of tensile properties was observed on precharged tensile specimens.
With dynamic charging, the degradation of tensile properties of the alloys was evident.
The hydrogen assisted cracking in fully austenitic alloy initiated at surface and propagated into the specimen mainly along the grain boundaries with some surface grains fractured transgranularly.
In ferrite-austenite dual phase alloy, the crack was either along the ferrite-austenite grain boundary or through the ferrite grains.
The most favorable crack path was the chain of ferrite grains situated along the austenite grain boundaries.
The austenite grains were relatively resistant to hydrogen assisted cracking.
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