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Enhancing Mechanical Properties of Q&P Steel Through Tailoring Film-like Retained Austenite Morphology via Heating Rate Optimization.

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Title: Enhancing Mechanical Properties of Q&P Steel Through Tailoring Film-like Retained Austenite Morphology via Heating Rate Optimization.
Authors: Wang, Shengwei1 (AUTHOR), Yang, Mingyue1,2 (AUTHOR), Chen, Mengxiao2,3 (AUTHOR), Huang, Yuhe1,4 (AUTHOR), Wang, Shuize1,4 (AUTHOR), Mao, Xinping1,2,4 (AUTHOR)
Source: Materials (1996-1944). Oct2025, Vol. 18 Issue 20, p4815. 10p.
Subjects: Austenite, Heat treatment of steel, Mechanical behavior of materials, Microstructure, Deformations (Mechanics), Tensile strength, Phase transitions
Abstract: In this study, by regulating the heating rate, we have optimized the morphology of retained austenite in a quenching and partitioning (Q&P) steel with initial microstructure consisting of lath martensite. By optimizing the heating rate to 1 °C/s during the heating stage from 700 °C to 830 °C, the formation of blocky austenite and the coarsening of film-like austenite during the two-phase region annealing process were prohibited. Ultimately, this resulted in the production of Q&P steel containing a significant volume fraction (19.0%) of fine film-like retained austenite. This fine and film-like retained austenite exhibits higher stability than blocky austenite, exhibiting an active transformation-induced plasticity (TRIP) effect over a broad strain range. This results in excellent mechanical properties characterized by a high product of tensile strength and elongation (34.1 GPa·%). [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI 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.)
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DbLabel: Engineering Source
An: 189028751
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PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Enhancing Mechanical Properties of Q&P Steel Through Tailoring Film-like Retained Austenite Morphology via Heating Rate Optimization.
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Oct2025, Vol. 18 Issue 20, p4815. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Austenite%22">Austenite</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+treatment+of+steel%22">Heat treatment of steel</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Tensile+strength%22">Tensile strength</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink>
– Name: Abstract
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  Data: In this study, by regulating the heating rate, we have optimized the morphology of retained austenite in a quenching and partitioning (Q&P) steel with initial microstructure consisting of lath martensite. By optimizing the heating rate to 1 °C/s during the heating stage from 700 °C to 830 °C, the formation of blocky austenite and the coarsening of film-like austenite during the two-phase region annealing process were prohibited. Ultimately, this resulted in the production of Q&P steel containing a significant volume fraction (19.0%) of fine film-like retained austenite. This fine and film-like retained austenite exhibits higher stability than blocky austenite, exhibiting an active transformation-induced plasticity (TRIP) effect over a broad strain range. This results in excellent mechanical properties characterized by a high product of tensile strength and elongation (34.1 GPa·%). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI 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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        Value: 10.3390/ma18204815
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 4815
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      – SubjectFull: Austenite
        Type: general
      – SubjectFull: Heat treatment of steel
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Microstructure
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      – SubjectFull: Deformations (Mechanics)
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      – SubjectFull: Tensile strength
        Type: general
      – SubjectFull: Phase transitions
        Type: general
    Titles:
      – TitleFull: Enhancing Mechanical Properties of Q&P Steel Through Tailoring Film-like Retained Austenite Morphology via Heating Rate Optimization.
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          Name:
            NameFull: Wang, Shengwei
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            NameFull: Yang, Mingyue
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            NameFull: Chen, Mengxiao
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            NameFull: Huang, Yuhe
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            NameFull: Wang, Shuize
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            NameFull: Mao, Xinping
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              M: 10
              Text: Oct2025
              Type: published
              Y: 2025
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              Value: 18
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