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金属学报(英文版) 1998
INVESTIGATION OF INFLUENCE OF HYDROGEN ATTACK ON FATIGUE PROPERTIES OF PRESSURE VESSEL STEELS
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Abstract:
1.IntroductionLowalloysteelsexposedtohydrogenatmoderatepressuresandtemperaturessufferalossinmechanicalandfatigueproperties.Thisphenomenon,calledhydrogenattack(HA)'],isduetothemethanegeneratedbychemicalreactioll:abC. 2H2~ac ACHe.Methaneformationmayoccureitheratafreesurface(surfacedecarburization)oratinternalsiteinthemetal(internaldecarburiatioll)suchasgrainboundariesanddefects.Internalmethaneisunabletodiffuseoutofthesteel,anditmaybllildupintheinterllalvoidsandgrainboundaries,growandcoalesce…
