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Investigation on the nucleation mechanism of deformation-induced martensite in an austenitic stainless steel under severe plastic deformation

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Abstract

The nucleation mechanism of deformation-induced martensite was investigated by x-ray diffraction and transmission electron microscope in an ultra-low carbon austenitic stainless steel deformed by equal channel angular pressing at room temperature. It was found that two types of martensite transformation mechanism, stress-assisted and strain-induced, occurred via the sequences of γ (fcc) → ϵ (hcp) → α′ (bcc) and/or γ → α′. In both cases, the crystallographic relationships among γ, ϵ, and α′ followed the Kurdjumov-Sachs orientation relationships: {111}γ //{0001}ϵ //{011}α′ and 〈110〉γ//〈1120̄〉ϵ//〈1̄11〉α′

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Authors and Affiliations

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

    C. X. Huang, S. D. Wu & S. X. Li

  2. Central Iron and Steel Research Institute, Beijing, 100081, China

    G. Yang & Y. L. Gao

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  1. C. X. Huang
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  2. G. Yang
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  3. Y. L. Gao
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  4. S. D. Wu
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  5. S. X. Li
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Correspondence to C. X. Huang.

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Huang, C.X., Yang, G., Gao, Y.L. et al. Investigation on the nucleation mechanism of deformation-induced martensite in an austenitic stainless steel under severe plastic deformation. Journal of Materials Research 22, 724–729 (2007). https://doi.org/10.1557/jmr.2007.0094

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  • DOI: https://doi.org/10.1557/jmr.2007.0094

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