Effect of high-pressure torsion processing and annealing on hydrogen embrittlement of type 304 metastable Austenitic stainless steel

Yoji Mine, Kazutaka Tachibana, Zenji Horita

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The effect of high-pressure torsion (HPT) and annealing on hydrogen embrittlement (HE) of a type 304 stainless steel was studied by metallographic characterization and tensile test after hydrogen gas charging. A volume fraction of ∼78 pct of the austenite transformed to α′ martensite by the HPT processing at an equivalent strain of ∼30. Annealing the HPT-processed specimen at a temperature of 873 K (600 °C) for 0.5 hours decreased the α′ martensite to ∼31 pct with the average grain size reduced to ∼0.43 μm through the reverse austenitic transformation. Hydrogen charge into the HPT-processed and the HPT+annealed specimens in the hydrogen content of ∼10 to 20 ppm led to no severe HE but appeared in the solution-treated specimen. Especially the 873 K (600 °C) annealed specimen had the ∼1.4 GPa tensile strength and the ∼50 pct reduction of area (RA) despite the hydrogenation.

Original languageEnglish
Pages (from-to)3110-3120
Number of pages11
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume41
Issue number12
DOIs
Publication statusPublished - Dec 1 2010

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hydrogen embrittlement
Hydrogen embrittlement
austenitic stainless steels
Austenitic stainless steel
Torsional stress
torsion
Annealing
annealing
Processing
Hydrogen
martensite
Martensite
Austenitic transformations
hydrogen
Stainless Steel
tensile tests
austenite
Austenite
tensile strength
Hydrogenation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Effect of high-pressure torsion processing and annealing on hydrogen embrittlement of type 304 metastable Austenitic stainless steel. / Mine, Yoji; Tachibana, Kazutaka; Horita, Zenji.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 41, No. 12, 01.12.2010, p. 3110-3120.

Research output: Contribution to journalArticle

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