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Effect of Deformation Temperature on Microstructure Evolution of S30408 Austenitic Stainless Steel for Cold-stretching Cryogenic Vessels |
Ying ZHANG1,Xiaozhe GAO2,Bin ZHANG1,**( ),Zhuman SONG3,Jinyang ZHENG2,Guangping ZHANG3 |
1. Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819 2. Institute of Process Equipment, Zhejiang University, Hangzhou 310027 3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Cite this article:
Ying ZHANG,Xiaozhe GAO,Bin ZHANG,Zhuman SONG,Jinyang ZHENG,Guangping ZHANG. Effect of Deformation Temperature on Microstructure Evolution of S30408 Austenitic Stainless Steel for Cold-stretching Cryogenic Vessels. Chinese Journal of Materials Research, 2014, 28(9): 682-688.
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Abstract Tensile tests of the 9% pre-strained S30408 austenitic stainless steel for cryogenic vessels were conducted at different cryogenic temperatures. Microstructures of the fractured specimens were examined. The results show that the phase transformation from γ-austenite to α'-martensite in the 9% pre-strained S30408 austenitic stainless steel was promoted under tensile deformation with a strain rate of 1.0×10-3/s at cryogenic temperatures. The lower the temperature at which tensile testing was performed, the more the amount of the phase transformation from γ into α', and the finer the martensite lath. The martensite transformation can be induced by the deformation of austenite, and the interface relationship between the α'-martensite and the γ-austenite phases is {111}γ∥{011}α' and <101>γ∥<111>α', which is in accord with the K-S model.
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Received: 22 April 2014
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Fund: *Supported by National Natural Science Foundation of China Nos. 51171045, 51371047& 51371180. |
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