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Effect of Nb on Microstructure and Mechanical Properties in Non-magnetic High Manganese Steel

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Abstract

Microstructure and mechanical properties of two kinds of non-magnetic high manganese steels with and without Nb addition which experienced the same rolling and heating treatment were investigated by means of scanning electron microscopy, electron back-scattered diffraction, transmission electron microscopy, X-ray diffraction and tensile test. It was found that the microstructure of the high manganese steel was refined by the Nb addition. Moreover, steel with Nb addition has a higher stacking fault energy which favors the deformation twinning. Twinning is the most important deformation mechanism in the Nb-bearing steel. Therefore, steel with Nb addition has much higher strength and higher plasticity. The product of tensile strength and total elongation exceeds 61.8 GPa · %. In addition, steel with Nb addition also has excellent non-magnetic property.

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Authors and Affiliations

  1. National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Jia-li Cao (Doctor Candidate), Ai-min Zhao (Doctor, Professor), Jian-guo He & Ran Ding

  2. Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, Beijing, 100083, China

    Jia-li Cao (Doctor Candidate), Ai-min Zhao (Doctor, Professor), Jian-guo He & Ran Ding

  3. Baotai Group Co., Ltd., Baoji, Shaanxi, 721014, China

    Ji-xiong Liu

Authors
  1. Jia-li Cao
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  2. Ai-min Zhao
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  3. Ji-xiong Liu
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  4. Jian-guo He
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  5. Ran Ding
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Correspondence to Ai-min Zhao.

Additional information

Foundation Item: Item Sponsored by National Natural Science Foundation of China (51271035); Specialized Research Fund for the Doctoral Program of Higher Education of China (20110006110007)

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Cao, Jl., Zhao, Am., Liu, Jx. et al. Effect of Nb on Microstructure and Mechanical Properties in Non-magnetic High Manganese Steel. J. Iron Steel Res. Int. 21, 600–605 (2014). https://doi.org/10.1016/S1006-706X(14)60093-5

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  • DOI: https://doi.org/10.1016/S1006-706X(14)60093-5

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