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Tailoring Heterogeneous Austenite Stability via Rapid Heating in Medium‐Mn Steel: Enabling Discontinuous Sustained Transformation‐Induced Plasticity.

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Title: Tailoring Heterogeneous Austenite Stability via Rapid Heating in Medium‐Mn Steel: Enabling Discontinuous Sustained Transformation‐Induced Plasticity.
Authors: Sun, Ying1 (AUTHOR), Jiao, Yingjian1 (AUTHOR), Li, Zhichao1,2 (AUTHOR) lizc@sdust.edu.cn, Xie, Kun1 (AUTHOR), He, Lianfang1 (AUTHOR) lf_he2007@126.com, Li, Huiping1,2 (AUTHOR) lihuiping99@163.com
Source: Steel Research International. Apr2026, Vol. 97 Issue 4, p2222-2232. 11p.
Subjects: Process heating, Microstructure, Grain refinement, Mechanical behavior of materials, Manganese steel, Material plasticity
Abstract: This study systematically investigates the effects of heating rate on the microstructural evolution, mechanical properties, austenite stability, and deformation strengthening mechanisms of Fe‐6Mn‐3Al‐0.2C medium‐Mn steel under austenite reverse transformation (ART), moderate rapid heating (MRH), and rapid heating (RH) processes. The results reveal that RH significantly enhanced mechanical performance, with the RH‐750‐300 specimen exhibiting the highest austenite fraction (76.65%) and the most pronounced transformation‐induced plasticity (TRIP) effect. RH promotes a heterogeneous microstructure consisting of equiaxed austenite, ultrafine film‐like austenite (FA), and granular austenite (GA), contributing grain refinement strengthening and hetero‐deformation‐induced (HDI) strengthening. Heterogeneous austenite stability facilitates a discontinuous yet sustained TRIP effect. Specifically, equiaxed austenite exhibits complex crystallographic orientation and a pronounced Mn concentration gradient, which induced strain incompatibility and reduced stability. In contrast, FA demonstrates a more uniform Mn distribution, consistent crystallographic orientation, and high dislocation density, thereby enhancing austenite stability and promoting boundary‐localized strengthening via dislocation pile‐ups. [ABSTRACT FROM AUTHOR]
Copyright of Steel Research International is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 192690251
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Tailoring Heterogeneous Austenite Stability via Rapid Heating in Medium‐Mn Steel: Enabling Discontinuous Sustained Transformation‐Induced Plasticity.
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  Data: <searchLink fieldCode="AR" term="%22Sun%2C+Ying%22">Sun, Ying</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiao%2C+Yingjian%22">Jiao, Yingjian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Zhichao%22">Li, Zhichao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> lizc@sdust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xie%2C+Kun%22">Xie, Kun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Lianfang%22">He, Lianfang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lf_he2007@126.com</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Huiping%22">Li, Huiping</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> lihuiping99@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Steel+Research+International%22">Steel Research International</searchLink>. Apr2026, Vol. 97 Issue 4, p2222-2232. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Process+heating%22">Process heating</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Grain+refinement%22">Grain refinement</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Manganese+steel%22">Manganese steel</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study systematically investigates the effects of heating rate on the microstructural evolution, mechanical properties, austenite stability, and deformation strengthening mechanisms of Fe‐6Mn‐3Al‐0.2C medium‐Mn steel under austenite reverse transformation (ART), moderate rapid heating (MRH), and rapid heating (RH) processes. The results reveal that RH significantly enhanced mechanical performance, with the RH‐750‐300 specimen exhibiting the highest austenite fraction (76.65%) and the most pronounced transformation‐induced plasticity (TRIP) effect. RH promotes a heterogeneous microstructure consisting of equiaxed austenite, ultrafine film‐like austenite (FA), and granular austenite (GA), contributing grain refinement strengthening and hetero‐deformation‐induced (HDI) strengthening. Heterogeneous austenite stability facilitates a discontinuous yet sustained TRIP effect. Specifically, equiaxed austenite exhibits complex crystallographic orientation and a pronounced Mn concentration gradient, which induced strain incompatibility and reduced stability. In contrast, FA demonstrates a more uniform Mn distribution, consistent crystallographic orientation, and high dislocation density, thereby enhancing austenite stability and promoting boundary‐localized strengthening via dislocation pile‐ups. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Steel Research International is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1002/srin.202500784
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 2222
    Subjects:
      – SubjectFull: Process heating
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Grain refinement
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Manganese steel
        Type: general
      – SubjectFull: Material plasticity
        Type: general
    Titles:
      – TitleFull: Tailoring Heterogeneous Austenite Stability via Rapid Heating in Medium‐Mn Steel: Enabling Discontinuous Sustained Transformation‐Induced Plasticity.
        Type: main
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          Name:
            NameFull: Sun, Ying
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          Name:
            NameFull: Jiao, Yingjian
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            NameFull: Li, Zhichao
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            NameFull: Xie, Kun
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            NameFull: He, Lianfang
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            NameFull: Li, Huiping
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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              Value: 97
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            – TitleFull: Steel Research International
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