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Effect of Grinding Surface Integrity on Fatigue Performance of γ‐TiAl Specimens.

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Title: Effect of Grinding Surface Integrity on Fatigue Performance of γ‐TiAl Specimens.
Authors: Huang, Tung1 (AUTHOR), Li, Xun1 (AUTHOR) lixun@buaa.edu.cn, Zhang, Ning2 (AUTHOR), Liu, Liangbao3 (AUTHOR) liangbaoliu@buaa.edu.cn, Zhou, Jinggang1 (AUTHOR)
Source: Fatigue & Fracture of Engineering Materials & Structures. Aug2026, Vol. 49 Issue 8, p3554-3566. 13p.
Subjects: Titanium aluminides, Surface hardening, Material fatigue, Titanium diboride, Material plasticity, Layer structure (Solids), Aerospace propulsion systems
Abstract: Gamma titanium‐aluminum (γ‐TiAl) intermetallic compound, owing to its lightweight, high‐temperature resistance and excellent specific strength, is an ideal material for manufacturing key hot‐end components in aero‐engines. Grinding is an effective machining process for γ‐TiAl finishing to obtain good surface integrity, which has a significant effect on the fatigue properties of specimens. The results show that the fatigue performance of specimens is basically the same under different surface roughness, because stress concentration of specimens is mainly affected by the lamellar structure. Furthermore, the surface micro‐hardening rate is a key factor affecting the fatigue performance of specimens; the cycles to failure increase accordingly as the micro‐hardening rate increases. Influenced by the difference in plastic deformation within the material, the larger plastic deformation layer depth has a significant negative effect on the fatigue performance of specimens. When the grinding depth increases to 40 μm, the TiB2‐phase influence zone reaches 27.6 μm, and the cycles to failure of the specimen sharply decreases to Nf = 2.7 × 105. An in‐depth analysis of the fatigue performance evolution law of γ‐TiAl specimens is conducted, which offers valuable reference for optimizing anti‐fatigue machining processes of aero‐engines' key components. Summary: Internal lamellar structures of γ‐TiAl specimens lead to brittle fracture characteristics.Surface micro‐hardness mainly affects fatigue performance of γ‐TiAl specimens.High TiB2‐phase fracture depth impairs fatigue performance due to stress concentration. [ABSTRACT FROM AUTHOR]
Copyright of Fatigue & Fracture of Engineering Materials & Structures 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: 195038604
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Effect of Grinding Surface Integrity on Fatigue Performance of γ‐TiAl Specimens.
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  Data: <searchLink fieldCode="AR" term="%22Huang%2C+Tung%22">Huang, Tung</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xun%22">Li, Xun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lixun@buaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Ning%22">Zhang, Ning</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Liangbao%22">Liu, Liangbao</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> liangbaoliu@buaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhou%2C+Jinggang%22">Zhou, Jinggang</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Fatigue+%26+Fracture+of+Engineering+Materials+%26+Structures%22">Fatigue & Fracture of Engineering Materials & Structures</searchLink>. Aug2026, Vol. 49 Issue 8, p3554-3566. 13p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Titanium+aluminides%22">Titanium aluminides</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+hardening%22">Surface hardening</searchLink><br /><searchLink fieldCode="DE" term="%22Material+fatigue%22">Material fatigue</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+diboride%22">Titanium diboride</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Layer+structure+%28Solids%29%22">Layer structure (Solids)</searchLink><br /><searchLink fieldCode="DE" term="%22Aerospace+propulsion+systems%22">Aerospace propulsion systems</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Gamma titanium‐aluminum (γ‐TiAl) intermetallic compound, owing to its lightweight, high‐temperature resistance and excellent specific strength, is an ideal material for manufacturing key hot‐end components in aero‐engines. Grinding is an effective machining process for γ‐TiAl finishing to obtain good surface integrity, which has a significant effect on the fatigue properties of specimens. The results show that the fatigue performance of specimens is basically the same under different surface roughness, because stress concentration of specimens is mainly affected by the lamellar structure. Furthermore, the surface micro‐hardening rate is a key factor affecting the fatigue performance of specimens; the cycles to failure increase accordingly as the micro‐hardening rate increases. Influenced by the difference in plastic deformation within the material, the larger plastic deformation layer depth has a significant negative effect on the fatigue performance of specimens. When the grinding depth increases to 40 μm, the TiB2‐phase influence zone reaches 27.6 μm, and the cycles to failure of the specimen sharply decreases to Nf = 2.7 × 105. An in‐depth analysis of the fatigue performance evolution law of γ‐TiAl specimens is conducted, which offers valuable reference for optimizing anti‐fatigue machining processes of aero‐engines' key components. Summary: Internal lamellar structures of γ‐TiAl specimens lead to brittle fracture characteristics.Surface micro‐hardness mainly affects fatigue performance of γ‐TiAl specimens.High TiB2‐phase fracture depth impairs fatigue performance due to stress concentration. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Fatigue & Fracture of Engineering Materials & Structures 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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    Identifiers:
      – Type: doi
        Value: 10.1111/ffe.70336
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 3554
    Subjects:
      – SubjectFull: Titanium aluminides
        Type: general
      – SubjectFull: Surface hardening
        Type: general
      – SubjectFull: Material fatigue
        Type: general
      – SubjectFull: Titanium diboride
        Type: general
      – SubjectFull: Material plasticity
        Type: general
      – SubjectFull: Layer structure (Solids)
        Type: general
      – SubjectFull: Aerospace propulsion systems
        Type: general
    Titles:
      – TitleFull: Effect of Grinding Surface Integrity on Fatigue Performance of γ‐TiAl Specimens.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Huang, Tung
      – PersonEntity:
          Name:
            NameFull: Li, Xun
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            NameFull: Zhang, Ning
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            NameFull: Liu, Liangbao
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            NameFull: Zhou, Jinggang
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          Dates:
            – D: 01
              M: 08
              Text: Aug2026
              Type: published
              Y: 2026
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              Value: 49
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              Value: 8
          Titles:
            – TitleFull: Fatigue & Fracture of Engineering Materials & Structures
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