FATIGUE OF DIN-1.4914 MARTENSITIC STAINLESS-STEEL IN A HYDROGEN ENVIRONMENT

Citation
Ji. Shakib et al., FATIGUE OF DIN-1.4914 MARTENSITIC STAINLESS-STEEL IN A HYDROGEN ENVIRONMENT, Journal of nuclear materials, 215, 1994, pp. 579-583
Citations number
19
Categorie Soggetti
Nuclear Sciences & Tecnology","Metallurgy & Mining","Material Science
ISSN journal
00223115
Volume
215
Year of publication
1994
Part
A
Pages
579 - 583
Database
ISI
SICI code
0022-3115(1994)215:<579:FODMSI>2.0.ZU;2-G
Abstract
Fatigue tests at room temperature in vacuum, air and hydrogen have bee n carried out on specimens of DIN 1.4914 martensitic stainless steel i n load-controlled, push-pull type experiments. Fatigue lifetimes in hy drogen are significantly lower than in both vacuum and air and the deg radation is enhanced by lowering the test frequency or introducing hol d times into the tension half-cycle. Fractographic examinations reveal hydrogen embrittlement effects in the form of internal cracking betwe en fatigue striations together with surface modifications, particularl y at low stress amplitudes. It is suggested that gaseous hydrogen can influence both fatigue crack initiation and propagation events in mart ensitic steels.