Effect of carbon on α′→γ reversion of metastable austenitic stainless steels

Kouki Tomimura, Manabu Oku, Setsuo Takaki, Youichi Tokunaga

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The effects of carbon on reversion behavior of metastable austenitic stainless steel were investigated using a 16.2% Cr- 8.8% Ni- 0.11% C steel. The steel used almost transforms to lath martensite (α′) from austenite (γ) by 90% cold rolling. The steel completely reverses on 923 K-10s annealing. However, isothermal α′ is produced on subsequent aging at room temperature (290 K) in case of more than 0.1 ks in 923 K isothermal annealing, and at 900 K and above in 0.6 ks isochronal annealing. In 923 K annealing, carbide precipitation occurred in preference to reversion. The carbide tends to retard a martensitic reversion and accelerated a diffusional reversion inversely. The grain size of γ reversed by a diffusional reversion at 923 K annealing is 0.2 μm dia. The carbide is effective for refining the grain by reversion.

Original languageEnglish
Pages (from-to)1186-1192
Number of pages7
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume75
Issue number7
DOIs
Publication statusPublished - Jan 1 1989

Fingerprint

austenitic stainless steels
Austenitic stainless steel
Carbon
Annealing
Carbides
annealing
carbon
carbides
Steel
steels
Isothermal annealing
Cold rolling
cold rolling
Martensite
Austenite
Refining
Carbon steel
refining
austenite
martensite

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Effect of carbon on α′→γ reversion of metastable austenitic stainless steels. / Tomimura, Kouki; Oku, Manabu; Takaki, Setsuo; Tokunaga, Youichi.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 75, No. 7, 01.01.1989, p. 1186-1192.

Research output: Contribution to journalArticle

Tomimura, Kouki ; Oku, Manabu ; Takaki, Setsuo ; Tokunaga, Youichi. / Effect of carbon on α′→γ reversion of metastable austenitic stainless steels. In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan. 1989 ; Vol. 75, No. 7. pp. 1186-1192.
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