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

材料科学技术（英文）, 2010, 26(4): 289-292.

^1, , ^2, , ^3,

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

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

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

基金项目: the Ministry of Science and Technology of China(2005CB623604) Financial supports from the National Natural Science Foundation of China(50971122;50431010;50621091;50890171)

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

G.Z. Liu ^1, , N.R. Tao ^2, , K. Lu ^3,

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

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

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

Keywords： Nano-scale twins

By means of dynamic plastic deformation (DPD) followed by thermal annealing, a mixed structure of microsized 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.

参考文献

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

参考文献