316L Austenite Stainless Steels Strengthened by Means of Nano-scale Twins

J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (4): 289-292.

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316L Austenite Stainless Steels Strengthened by Means of Nano-scale Twins

G.Z. Liu, N.R. Tao, K. Lu

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2009-12-10 Online:2010-04-30 Published:2010-04-28
Supported by:
the National Natural Science Foundation of China (Grants Nos. 50971122, 50431010, 50621091 and 50890171)
the Ministry of Science and Technology of China (2005CB623604)

Abstract

Abstract:

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.

Key words: Nano-scale twins, Strength-ductility combination, Dynamic plastic deformation (DPD), Stainless steels

G.Z. Liu N.R. Tao K. Lu. 316L Austenite Stainless Steels Strengthened by Means of Nano-scale Twins[J]. J Mater Sci Technol, 2010, 26(4): 289-292.

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316L Austenite Stainless Steels Strengthened by Means of Nano-scale Twins

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