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Mechanical Response Governed by Twinning‐Induced the Rotation of Twin Plane and Slip Plane in MnCuNiFe Alloy Under Dynamic Deformation.

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Title: Mechanical Response Governed by Twinning‐Induced the Rotation of Twin Plane and Slip Plane in MnCuNiFe Alloy Under Dynamic Deformation.
Authors: Cui, Haotian1 (AUTHOR), Li, Qipeng2 (AUTHOR), Tian, Qingchao1 (AUTHOR) tctian@shu.edu.cn
Source: Steel Research International. Jun2026, Vol. 97 Issue 6, p3413-3424. 12p.
Subjects: Twinning (Crystallography), Dislocation density, Deformations (Mechanics), Nickel-manganese alloys, Transmission electron microscopy, Strain rate
Abstract: To understand the deformation mechanisms of MnCuNiFe alloy under dynamic deformation, the microstructure characteristics are investigated under strain rates up to 300 s−1 by using electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), and X‐ray diffraction (XRD). The results show that the dynamic deformation of the alloy can be described by the Cowper–Symonds constitutive model DIF = 1 + (ε.$\overset{.}{\epsilon}$/637)1/2·08, which is comparable to the response of steels governed by dislocation damping. It reveals that the total dislocation density correlates with the strain rate according to ρ=(2.70)ε.(0.08)$\rho = \left(\right. 2.70 \left.\right) \left(\overset{.}{\epsilon}\right)^{\left(\right. 0.08 \left.\right)}$. The density of geometrically necessary dislocations (GNDs) increases progressively with strain rate, while the density of statistically stored dislocations (SSDs) shows a different variation tendency. Twinning induces slip plane rotation, leading to a reduction in the Schmid Factor that significantly impedes dislocation motion. It is proposed that the initial vibration attenuation is attributed to dislocation damping, and twinning‐induced twin plane rotation, as well as the deflection of the (111) slip system mitigates the fluctuations of subsequent stress waves. The equations proposed in the paper are crucial for predicting the dynamic behavior of this MnCuNiFe alloy. [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.)
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DbLabel: Engineering Source
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Mechanical Response Governed by Twinning‐Induced the Rotation of Twin Plane and Slip Plane in MnCuNiFe Alloy Under Dynamic Deformation.
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  Data: <searchLink fieldCode="AR" term="%22Cui%2C+Haotian%22">Cui, Haotian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Qipeng%22">Li, Qipeng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tian%2C+Qingchao%22">Tian, Qingchao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> tctian@shu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Steel+Research+International%22">Steel Research International</searchLink>. Jun2026, Vol. 97 Issue 6, p3413-3424. 12p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Twinning+%28Crystallography%29%22">Twinning (Crystallography)</searchLink><br /><searchLink fieldCode="DE" term="%22Dislocation+density%22">Dislocation density</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel-manganese+alloys%22">Nickel-manganese alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopy%22">Transmission electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Strain+rate%22">Strain rate</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To understand the deformation mechanisms of MnCuNiFe alloy under dynamic deformation, the microstructure characteristics are investigated under strain rates up to 300 s−1 by using electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), and X‐ray diffraction (XRD). The results show that the dynamic deformation of the alloy can be described by the Cowper–Symonds constitutive model DIF = 1 + (ε.$\overset{.}{\epsilon}$/637)1/2·08, which is comparable to the response of steels governed by dislocation damping. It reveals that the total dislocation density correlates with the strain rate according to ρ=(2.70)ε.(0.08)$\rho = \left(\right. 2.70 \left.\right) \left(\overset{.}{\epsilon}\right)^{\left(\right. 0.08 \left.\right)}$. The density of geometrically necessary dislocations (GNDs) increases progressively with strain rate, while the density of statistically stored dislocations (SSDs) shows a different variation tendency. Twinning induces slip plane rotation, leading to a reduction in the Schmid Factor that significantly impedes dislocation motion. It is proposed that the initial vibration attenuation is attributed to dislocation damping, and twinning‐induced twin plane rotation, as well as the deflection of the (111) slip system mitigates the fluctuations of subsequent stress waves. The equations proposed in the paper are crucial for predicting the dynamic behavior of this MnCuNiFe alloy. [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:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1002/srin.202501145
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 12
        StartPage: 3413
    Subjects:
      – SubjectFull: Twinning (Crystallography)
        Type: general
      – SubjectFull: Dislocation density
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Nickel-manganese alloys
        Type: general
      – SubjectFull: Transmission electron microscopy
        Type: general
      – SubjectFull: Strain rate
        Type: general
    Titles:
      – TitleFull: Mechanical Response Governed by Twinning‐Induced the Rotation of Twin Plane and Slip Plane in MnCuNiFe Alloy Under Dynamic Deformation.
        Type: main
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          Name:
            NameFull: Cui, Haotian
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            NameFull: Li, Qipeng
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            NameFull: Tian, Qingchao
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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