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Effect of Al and Mo Redistribution on α/β Interface Stability in Dual-Phase Titanium Alloys During Plastic Deformation.

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Title: Effect of Al and Mo Redistribution on α/β Interface Stability in Dual-Phase Titanium Alloys During Plastic Deformation.
Authors: Zhang, Wenyu1,2 (AUTHOR), Shi, Mingjie2,3 (AUTHOR), Guo, Ziyu3,4 (AUTHOR), Ma, Shangyi1,4 (AUTHOR) shyma@imr.ac.cn, Chen, Qiujie5 (AUTHOR) chenqiujie@buaa.edu.cn
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 11, p2308. 10p.
Subjects: Interface stability, Molybdenum, Superplasticity, Material plasticity, Titanium alloys, Microstructure
Abstract: The TC11 α + β dual-phase titanium alloy exhibits limited room-temperature ductility (3.3 × 10−4 s−1: elongation 13.8%) but achieves significant superplasticity at 900 °C (3.3 × 10−4 s−1: elongation 314%), which correlates strongly with the mechanical response of α/β interfaces. These interfaces, which often crack at room temperature, undergo extensive sliding while preserving structural integrity during superplastic deformation. Combining microstructural analysis with first principles calculations, this study reveals how the stability of the α/β interface is dominated by the redistribution of alloying elements, thereby leading to distinct mechanical behaviors. Energy-dispersive X-ray spectroscopy results and calculated solution energies demonstrate that Mo preferentially dissolves in the β phase, whereas Al exhibits comparable solubility in both phases with a slight preference for the α phase. During high-temperature deformation, the α→β transformation drives Mo redistribution away from the interface toward newly formed β phases. This redistribution of Mo lowers the interfacial energy, strengthens the interface, suppresses stress-induced cracking, and ensures macroscopic continuity. Our study provides a theoretical perspective for Ti alloy design through interfacial engineering. [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: 194587219
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Effect of Al and Mo Redistribution on α/β Interface Stability in Dual-Phase Titanium Alloys During Plastic Deformation.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Wenyu%22">Zhang, Wenyu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Mingjie%22">Shi, Mingjie</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Ziyu%22">Guo, Ziyu</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Shangyi%22">Ma, Shangyi</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<i> shyma@imr.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Qiujie%22">Chen, Qiujie</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> chenqiujie@buaa.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2026, Vol. 19 Issue 11, p2308. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Interface+stability%22">Interface stability</searchLink><br /><searchLink fieldCode="DE" term="%22Molybdenum%22">Molybdenum</searchLink><br /><searchLink fieldCode="DE" term="%22Superplasticity%22">Superplasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+alloys%22">Titanium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The TC11 α + β dual-phase titanium alloy exhibits limited room-temperature ductility (3.3 × 10−4 s−1: elongation 13.8%) but achieves significant superplasticity at 900 °C (3.3 × 10−4 s−1: elongation 314%), which correlates strongly with the mechanical response of α/β interfaces. These interfaces, which often crack at room temperature, undergo extensive sliding while preserving structural integrity during superplastic deformation. Combining microstructural analysis with first principles calculations, this study reveals how the stability of the α/β interface is dominated by the redistribution of alloying elements, thereby leading to distinct mechanical behaviors. Energy-dispersive X-ray spectroscopy results and calculated solution energies demonstrate that Mo preferentially dissolves in the β phase, whereas Al exhibits comparable solubility in both phases with a slight preference for the α phase. During high-temperature deformation, the α→β transformation drives Mo redistribution away from the interface toward newly formed β phases. This redistribution of Mo lowers the interfacial energy, strengthens the interface, suppresses stress-induced cracking, and ensures macroscopic continuity. Our study provides a theoretical perspective for Ti alloy design through interfacial engineering. [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/ma19112308
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 2308
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      – SubjectFull: Interface stability
        Type: general
      – SubjectFull: Molybdenum
        Type: general
      – SubjectFull: Superplasticity
        Type: general
      – SubjectFull: Material plasticity
        Type: general
      – SubjectFull: Titanium alloys
        Type: general
      – SubjectFull: Microstructure
        Type: general
    Titles:
      – TitleFull: Effect of Al and Mo Redistribution on α/β Interface Stability in Dual-Phase Titanium Alloys During Plastic Deformation.
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          Name:
            NameFull: Zhang, Wenyu
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            NameFull: Shi, Mingjie
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            NameFull: Guo, Ziyu
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            NameFull: Ma, Shangyi
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            NameFull: Chen, Qiujie
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 19
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            – TitleFull: Materials (1996-1944)
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