Effect of hydrogen on internal friction and Young`s modulus of Fe-Cr-Mn austenitic stainless steel

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00043-7· OSTI ID:250694

Usui, Makoto ^[1]; Asano, Shigeru ^[2]

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1. Aichi Steel Works, Ltd., Tokai (Japan). Research Div.
2. Nagoya Inst. of Tech. (Japan). Dept. of Materials Science and Engineering

The internal friction technique has so far been applied to studies on hydrogen behavior in iron and steel. The hydrogen cold-work peak is well known for pure iron and has also been observed in BCC iron alloys such as ferritic stainless steel and maraging steel. It provides important information about the hydrogen- dislocation interaction in the BCC iron lattice. Meanwhile, for FCC iron alloys such as austenitic stainless steel, another characteristic hydrogen internal friction peak has been found by authors` group and confirmed by several other investigators. In the present study, type 205 austenitic stainless steel (Fe-17Cr-15Mn) was chosen as a nickel-free FCC iron alloy, in which manganese is totally substituted for nickel in type 304 steel. This steel has an unstable FCC lattice as is the case of type 304 steel, in which hydrogen-induced phase transformation depends on the austenite stability. However, the present steel was confirmed to form the {var_epsilon}{sub H} phase after cathodic hydrogen charging in a similar manner to the stable FCC lattice of type 310 steel. In addition, the Fe-Cr-Mn alloy shows a marked anomaly in the temperature dependence of Young`s modulus: an abrupt drop near the Neel temperature T{sub N} and successive lowering below T{sub N}, as has been reported in the literature for some antiferromagnetic materials. The effect of hydrogen on Young`s modulus was studied by several investigators, but there was great inconsistency among their experimental results. The purpose of this paper is to confirm the hydrogen peak of internal friction in type 205 steel and to examine the effect of hydrogen on Young`s modulus of this steel.

• OSTI ID: 250694
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 11 Vol. 34; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON ADDITIONS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CURRENT DENSITY
ELECTROCHEMICAL CELLS
FCC LATTICES
HEAT TREATMENTS
HYDROGEN
INTERNAL FRICTION
IRON BASE ALLOYS
MANGANESE ALLOYS
MECHANICAL VIBRATIONS
METALLURGICAL EFFECTS
NEEL TEMPERATURE
NICKEL ALLOYS
NITROGEN ADDITIONS
QUENCHING
RELAXATION
SAMPLE PREPARATION
SILICON ADDITIONS
TEMPERATURE DEPENDENCE
YOUNG MODULUS