Hydrogen-induced phases in AISI 310 type steel

Journal Article · Thu Sep 15 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90227-5· OSTI ID:7105034

Gavriljuk, V G; Tereshchenko, A S ^[1]; Haenninen, H; Ullakko, K ^[2]

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1. Inst. for Metal Physics, Kiev (Ukraine)
2. Helsinki Univ. of Technology, Espoo (Finland). Lab. of Engineering Materials

Hydrogen-induced phases in stable austenitic stainless steels which do not undergo any transformations by cold work or low temperature cooling have been an object of several studies. As was shown in a previous study, alloying with nitrogen increases the stability of Cr18Ni16Mn10 steel with respect to hydrogen-induced [epsilon][sub H] formation and, at nitrogen contents of more than 0.5 wt. %, the [epsilon][sub H] phase is no longer formed. As nitrogen retards the HE of austenitic stainless steels, it is important to test its stabilizing effect in steels of different compositions. The present paper aims to study the formation and disappearance of hydrogen-induced phases in AISI 310 type steel during hydrogen charging and outgassing. This study concludes that alloying with nitrogen retards the formation of the phase [epsilon][sub H] that is caused by hydrogen charging; and the change of [gamma] reflections in diffraction patterns during the aging of hydrogen-charged steels does not confirm either the occurrence of a modulated structure or the existence of the [gamma][sub H] phase ([gamma]*) as a pseudo-hydride precipitated through spinodal decomposition of hydrogenated austenite.

• OSTI ID: 7105034
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:6; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ELEMENTS
EMBRITTLEMENT
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
HYDROGEN EMBRITTLEMENT
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
METALLURGICAL EFFECTS
MICROSTRUCTURE
NICKEL ALLOYS
NITROGEN
NONMETALS
PHASE TRANSFORMATIONS
STAINLESS STEEL-310
STAINLESS STEELS
STEEL-CR25NI20
STEELS