On the Strength of a 316L-Type Stainless Steel Subjected to Cold or Warm Rolling Followed by Annealing.

ABSTRACT: The ultrafine-grained microstructures and their effect on the yield strength of a 316L-type austenitic stainless steel processed by large strain cold/warm rolling and subsequent annealing were studied. A kind of continuous recrystallization developed during annealing, resulting in the evolution of uniform ultrafine-grained microstructures with relatively high residual dislocation densities. The development of such microstructure at 973 K led to excellent combination of tensile properties including high yield strength (?0.2 > 900 MPa) and satisfactory plasticity (? > 15%). A unique power law function between the annealed grain size and the dislocation density with a dislocation density exponent of -0.5 was obtained for these continuously recrystallized microstructures. A physically justified explanation of the observed structural/substructural strengthening is introduced.

SUBMITTER: Odnobokova M 

PROVIDER: S-EPMC7254252 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature