Development of Ultrafine Grained Austenitic Stainless Steels by Large Strain Deformation and Annealing

Andrey Belyakov; Alla Kipelova; Marina Odnobokova; Iaroslava Shakhova; Rustam Kaibyshev

doi:10.4028/www.scientific.net/MSF.783-786.651

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HomeMaterials Science ForumMaterials Science Forum Vols. 783-786Development of Ultrafine Grained Austenitic...

Development of Ultrafine Grained Austenitic Stainless Steels by Large Strain Deformation and Annealing

Abstract:

The development of ultrafine grained structures in 316L and 304-type austenitic stainless steels subjected to large strain cold working and subsequent annealing and their effect on mechanical properties were studied. The cold rolling was accompanied by a mechanical twinning and a partial martensitic transformation and resulted in the development of elongated austenite/ferrite grains with the transverse size of about 50 nm at a strain of 4. The grain refinement by large strain cold working resulted in an increase of tensile strength above 2000 MPa in the both steels. Annealing at temperatures above 500°C resulted in ferrite-austenite reversion. However, the transverse grain/subgrain size remained on the level of about 100-150 nm after annealing at temperatures up to 700°C.

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Periodical:

Materials Science Forum (Volumes 783-786)

Pages:

651-656

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.783-786.651

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Online since:

May 2014

Authors:

Andrey Belyakov*, Alla Kipelova, Marina Odnobokova, Iaroslava Shakhova, Rustam Kaibyshev

Keywords:

Austenitic Stainless Steel, Cold Rolling, Grain Refinement, Phase Transformation, Recovery, Recrystallization

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