Effect of large strain cold rolling and subsequent annealing on microstructure and mechanical properties of an austenitic stainless steel

I. Shakhova, V. Dudko, A. Belyakov, Kaneaki Tsuzaki, R. Kaibyshev

Research output: Contribution to journalArticle

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Abstract

The microstructural evolution of an S304H steel during bar rolling to a strain of 4 and subsequent annealing as well as its effect on the mechanical properties were investigated. The cold working was accompanied by a strain-induced martensitic transformation, leading to the development of lamellar-type microstructure consisting of highly elongated austenite/ferrite subgrains with a mean transverse size of approximately 50. nm; the austenite volume fraction was approximately 0.35. This material exhibited a yield strength above 2000. MPa. The subsequent annealing resulted in grain coarsening following the ferrite → austenite reversion, which led to almost full austenitization at temperatures above 700 °C. The formation of the austenite/ferrite lamellar structure that mixed with separate equiaxed grains occurred after annealing at temperatures of T≤ 700 °C. The grain coarsening was accompanied by a degradation in strength, although the yield strength of above 1000. MPa remained after 2. h of annealing at 700 °C. The discontinuous recrystallization of austenite resulted in the development of a relatively coarse-grained microstructure at T≥ 800 °C.

Original languageEnglish
Pages (from-to)176-186
Number of pages11
JournalMaterials Science and Engineering A
Volume545
DOIs
Publication statusPublished - May 30 2012
Externally publishedYes

Fingerprint

cold rolling
austenitic stainless steels
Cold rolling
Austenitic stainless steel
austenite
Austenite
mechanical properties
Annealing
Mechanical properties
microstructure
Microstructure
annealing
Ferrite
ferrites
Coarsening
yield strength
Yield stress
cold working
Cold working
Lamellar structures

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Effect of large strain cold rolling and subsequent annealing on microstructure and mechanical properties of an austenitic stainless steel. / Shakhova, I.; Dudko, V.; Belyakov, A.; Tsuzaki, Kaneaki; Kaibyshev, R.

In: Materials Science and Engineering A, Vol. 545, 30.05.2012, p. 176-186.

Research output: Contribution to journalArticle

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AU - Kaibyshev, R.

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