Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 647, Issue -, Pages 152-156Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.08.065
Keywords
Nanotwins; Strengthening; Austenitic stainless steel
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Funding
- National Natural Science Foundation of China [51371172]
- Ministry of Science and Technology of the People's Rebuplic of China [2012CB932201]
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Two types of austenitic stainless steel samples were prepared by means of dynamic plastic deformation followed by annealing: nanotwinned austenitic grains embedded in recrystallized austenite matrix and martensitic/austenitic duplex microstructures. Annealing at 923 K induced martensitic reversion while most nanotwinned grains are stable. An enhanced strength-ductility combination is observed in the annealed nanotwinned samples which exhibit a uniform elongation of similar to 21% and a yield strength of similar to 900 MPa, in contrast to a uniform elongation of similar to 12% with comparable strength in the martensitit/ austenitic samples. (C) 2015 Elsevier B.V. All rights reserved.
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