期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 26, 期 4, 页码 289-292出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/S1005-0302(10)60048-5
关键词
Nano-scale twins; Strength-ductility combination; Dynamic plastic deformation (DPD); Stainless steels
资金
- National Natural Science Foundation of China [50971122, 50431010, 50621091, 50890171]
- Ministry of Science and Technology of China [2005CB623604]
By means of dynamic plastic deformation (DPD) followed by thermal annealing, a mixed structure of micro-sized austenite grains embedded with nano-scale twin bundles (of about 20% in volume) has been synthesized in a 316L stainless steel (SS). Such a 316L SS sample exhibits a tensile strength as high as 1001 MPa and an elongation-to-failure of about 23%. The much elevated strength originates from the presence of a considerable number of strengthening nano-twin bundles, while the ductility from the recrystallized grains. The superior strength-ductility combination achieved in the nano-twins-strengthened austenite steel demonstrates a novel approach for optimizing the mechanical properties in engineering materials.
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