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A Study on the Orientation Relationship and Interface Structure of the α 2 (Ti 3 Al) and B2 Phases in the TiAl-Nb Sheets After Heat Treatment.

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Title: A Study on the Orientation Relationship and Interface Structure of the α 2 (Ti 3 Al) and B2 Phases in the TiAl-Nb Sheets After Heat Treatment.
Authors: Liu, Jiyao1,2 (AUTHOR), Zhang, Laiqi2,3 (AUTHOR), Li, Muyu2,3,4 (AUTHOR), Yao, Dan1,2,4 (AUTHOR), Niu, Yixu1,2 (AUTHOR), Li, Bin1,2 (AUTHOR), Song, Yahu1,4 (AUTHOR)
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 11, p2427. 20p.
Subjects: Heat treatment, Interface structures, Sheet metal, Layer structure (Solids), Crystal orientation, Microstructure
Abstract: In this paper, TiAl-Nb sheets were fabricated via elemental foil metallurgy using Ti, Al, and Nb foils. The microstructure of the TiAl-Nb sheet was regulated by a two-step heat treatment process, which involved short-time holding at 1410 °C, 1430 °C and 1450 °C, followed by long-time holding at 1150 °C. Subsequently, the microstructure of the sheet was analyzed, emphasizing the orientation relationship and interface structure between the B2/β phase, Ti3Al phase, and the TiAl matrix. The results indicated that, subsequent to diverse heat treatment processes, the TiAl-Nb sheet comprised α2(Ti3Al) and B2/β phases at the grain boundaries and within the grains, whereas the matrix structure was γ(TiAl). After TiAl-Nb sheets were heat-treated at 1410 °C for 3 min and then at 1150 °C for 2 h, the microstructure of the sheets was observed to be composed of relatively fine lamellar structures. The TiAl phase, Ti3Al phase and B2/β phase existed in the form of coherent interfaces with extremely small misfit degrees. The interfacial energy between phases was small, making it easier to obtain an alloy microstructure with a higher content of the γ(TiAl) phase. To further provide a basis for the selection of heat treatment processes, the matrix method analysis indicated that, after holding at 1410 °C for 3 min and subsequently at 1150 °C for 2 h, the TiAl phase and Ti3Al phase in the sheet structure exhibited obvious preferred orientations. A short β-phase holding (3 min) followed by a long α + γ two-phase holding was an effective process route for obtaining a fine lamellar structure. [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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An: 194587338
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  Data: A Study on the Orientation Relationship and Interface Structure of the α 2 (Ti 3 Al) and B2 Phases in the TiAl-Nb Sheets After Heat Treatment.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Jiyao%22">Liu, Jiyao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Laiqi%22">Zhang, Laiqi</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Muyu%22">Li, Muyu</searchLink><relatesTo>2,3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yao%2C+Dan%22">Yao, Dan</searchLink><relatesTo>1,2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Niu%2C+Yixu%22">Niu, Yixu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Bin%22">Li, Bin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Yahu%22">Song, Yahu</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2026, Vol. 19 Issue 11, p2427. 20p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Interface+structures%22">Interface structures</searchLink><br /><searchLink fieldCode="DE" term="%22Sheet+metal%22">Sheet metal</searchLink><br /><searchLink fieldCode="DE" term="%22Layer+structure+%28Solids%29%22">Layer structure (Solids)</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+orientation%22">Crystal orientation</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink>
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  Label: Abstract
  Group: Ab
  Data: In this paper, TiAl-Nb sheets were fabricated via elemental foil metallurgy using Ti, Al, and Nb foils. The microstructure of the TiAl-Nb sheet was regulated by a two-step heat treatment process, which involved short-time holding at 1410 °C, 1430 °C and 1450 °C, followed by long-time holding at 1150 °C. Subsequently, the microstructure of the sheet was analyzed, emphasizing the orientation relationship and interface structure between the B2/β phase, Ti3Al phase, and the TiAl matrix. The results indicated that, subsequent to diverse heat treatment processes, the TiAl-Nb sheet comprised α2(Ti3Al) and B2/β phases at the grain boundaries and within the grains, whereas the matrix structure was γ(TiAl). After TiAl-Nb sheets were heat-treated at 1410 °C for 3 min and then at 1150 °C for 2 h, the microstructure of the sheets was observed to be composed of relatively fine lamellar structures. The TiAl phase, Ti3Al phase and B2/β phase existed in the form of coherent interfaces with extremely small misfit degrees. The interfacial energy between phases was small, making it easier to obtain an alloy microstructure with a higher content of the γ(TiAl) phase. To further provide a basis for the selection of heat treatment processes, the matrix method analysis indicated that, after holding at 1410 °C for 3 min and subsequently at 1150 °C for 2 h, the TiAl phase and Ti3Al phase in the sheet structure exhibited obvious preferred orientations. A short β-phase holding (3 min) followed by a long α + γ two-phase holding was an effective process route for obtaining a fine lamellar structure. [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/ma19112427
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      – Code: eng
        Text: English
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        PageCount: 20
        StartPage: 2427
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      – SubjectFull: Heat treatment
        Type: general
      – SubjectFull: Interface structures
        Type: general
      – SubjectFull: Sheet metal
        Type: general
      – SubjectFull: Layer structure (Solids)
        Type: general
      – SubjectFull: Crystal orientation
        Type: general
      – SubjectFull: Microstructure
        Type: general
    Titles:
      – TitleFull: A Study on the Orientation Relationship and Interface Structure of the α 2 (Ti 3 Al) and B2 Phases in the TiAl-Nb Sheets After Heat Treatment.
        Type: main
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          Name:
            NameFull: Liu, Jiyao
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            NameFull: Zhang, Laiqi
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            NameFull: Li, Muyu
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          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
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              Value: 19
            – Type: issue
              Value: 11
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            – TitleFull: Materials (1996-1944)
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