Ultrafine grain evolution in austenitic stainless steel during large strain deformation and subsequent annealing

Andrey Belyakov, Kaneaki Tsuzaki, Rustam Kaibyshev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The structural changes in a 304-type austenitic stainless steel during large strain cold rolling and subsequent annealing were studied. The severe deformation resulted in the development of highly elongated grains/subgrains aligned along the rolling axis. The transverse grain/subgrain size rapidly decreased to its minimal value of about 50 nm at relatively small strains of ∼1 and then hardly changed upon following deformation. Such a structural response on cold working was associated with multiple twinning resulting in fast grain subdivision. The processing was accompanied by a partial martensitic transformation resulting in a decrease of austenite volume fraction to about 0.35 after straining to ε?= 4.0. Isochronal annealing for 30 min was characterised by a gradual coarsening of grains, the average size of which increased to about 200 nm after heating to 800°C. The high elongation of ferrite grains facilitated simultaneous homogeneous nucleation of austenite grains throughout the matrix upon heating; and, therefore, promoted the development of ultrafine grained structure with the size of structural elements well below 1 micron.

Original languageEnglish
Title of host publicationRecrystallization and Grain Growth IV
Pages273-278
Number of pages6
DOIs
Publication statusPublished - May 14 2012
Externally publishedYes
Event4th International Conference on Recrystallization and Grain Growth, ReX and GG IV - Sheffield, United Kingdom
Duration: Jul 4 2010Jul 9 2010

Publication series

NameMaterials Science Forum
Volume715-716
ISSN (Print)0255-5476

Other

Other4th International Conference on Recrystallization and Grain Growth, ReX and GG IV
CountryUnited Kingdom
CitySheffield
Period7/4/107/9/10

Fingerprint

austenitic stainless steels
Austenitic stainless steel
Annealing
annealing
Austenite
austenite
Heating
Cold working
Cold rolling
Twinning
Martensitic transformations
cold working
Coarsening
subdivisions
cold rolling
heating
Ferrite
martensitic transformation
Elongation
Volume fraction

All Science Journal Classification (ASJC) codes

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

Cite this

Belyakov, A., Tsuzaki, K., & Kaibyshev, R. (2012). Ultrafine grain evolution in austenitic stainless steel during large strain deformation and subsequent annealing. In Recrystallization and Grain Growth IV (pp. 273-278). (Materials Science Forum; Vol. 715-716). https://doi.org/10.4028/www.scientific.net/MSF.715-716.273

Ultrafine grain evolution in austenitic stainless steel during large strain deformation and subsequent annealing. / Belyakov, Andrey; Tsuzaki, Kaneaki; Kaibyshev, Rustam.

Recrystallization and Grain Growth IV. 2012. p. 273-278 (Materials Science Forum; Vol. 715-716).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Belyakov, A, Tsuzaki, K & Kaibyshev, R 2012, Ultrafine grain evolution in austenitic stainless steel during large strain deformation and subsequent annealing. in Recrystallization and Grain Growth IV. Materials Science Forum, vol. 715-716, pp. 273-278, 4th International Conference on Recrystallization and Grain Growth, ReX and GG IV, Sheffield, United Kingdom, 7/4/10. https://doi.org/10.4028/www.scientific.net/MSF.715-716.273
Belyakov, Andrey ; Tsuzaki, Kaneaki ; Kaibyshev, Rustam. / Ultrafine grain evolution in austenitic stainless steel during large strain deformation and subsequent annealing. Recrystallization and Grain Growth IV. 2012. pp. 273-278 (Materials Science Forum).
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