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Engineering omega phase enables a wide temperature range Elinvar effect in metastable β-Ti alloys.

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Titel: Engineering omega phase enables a wide temperature range Elinvar effect in metastable β-Ti alloys.
Autoren: Fu, Yu1,2 (AUTHOR), Peng, Huabei1 (AUTHOR) penghuabei@scu.edu.cn, Wang, Hui1,3 (AUTHOR) qinghe5525@163.com, Wang, Haoliang4 (AUTHOR), Cheng, Jun1,5 (AUTHOR) chengjun_851118@126.com, Wen, Yuhua1 (AUTHOR), Xiao, Wenlong2,6 (AUTHOR), Zhao, Xinqing2 (AUTHOR), Ma, Chaoli2,6 (AUTHOR)
Quelle: Journal of Materials Science & Technology. Aug2025, Vol. 225, p159-164. 6p.
Schlagwörter: Titanium alloys, Heating control, Thermal expansion, X-ray diffraction, High temperatures
Abstract: • Wide temperature range Elinvar effect was achieved during heating of a solution-treated metastable β Ti alloy. • In-situ XRD and TEM were employed to elucidate the origin of the Elinvar effect. • The ω ath phase growth and its gradual transition towards ω iso phase led to the Elinvar effect. • The Elinvar effect can be tailored by the heating rate in metastable β Ti alloys. Temperature-independent modulus, i.e., the Elinvar effect, over a high and broad temperature range (119 °C to 400 °C) was tailored in a solution-treated metastable Ti-15Nb-5Zr-4Sn-1Fe alloy. This Elinvar effect was attained by continued growth and structure transition of the quench-induced trigonal athermal ω phase towards the high modulus thermal-induced hexagonal isothermal ω phase, compensating for the modulus softening of the β matrix due to thermal expansion during heating. Such ω phase-induced Elinvar effect can be tuned by varying heating rates to control the evolution of the ω phase and is potentially attainable in other metastable β-Ti alloys. This study showcases a new strategy for developing Elinvar Ti alloys by engineering the development of ω phase during heating. [Display omitted] [ABSTRACT FROM AUTHOR]
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Engineering omega phase enables a wide temperature range Elinvar effect in metastable β-Ti alloys.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Fu%2C+Yu%22">Fu, Yu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peng%2C+Huabei%22">Peng, Huabei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> penghuabei@scu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Hui%22">Wang, Hui</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> qinghe5525@163.com</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Haoliang%22">Wang, Haoliang</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Jun%22">Cheng, Jun</searchLink><relatesTo>1,5</relatesTo> (AUTHOR)<i> chengjun_851118@126.com</i><br /><searchLink fieldCode="AR" term="%22Wen%2C+Yuhua%22">Wen, Yuhua</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiao%2C+Wenlong%22">Xiao, Wenlong</searchLink><relatesTo>2,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Xinqing%22">Zhao, Xinqing</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Chaoli%22">Ma, Chaoli</searchLink><relatesTo>2,6</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Science+%26+Technology%22">Journal of Materials Science & Technology</searchLink>. Aug2025, Vol. 225, p159-164. 6p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Titanium+alloys%22">Titanium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Heating+control%22">Heating control</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+expansion%22">Thermal expansion</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperatures%22">High temperatures</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Wide temperature range Elinvar effect was achieved during heating of a solution-treated metastable β Ti alloy. • In-situ XRD and TEM were employed to elucidate the origin of the Elinvar effect. • The ω ath phase growth and its gradual transition towards ω iso phase led to the Elinvar effect. • The Elinvar effect can be tailored by the heating rate in metastable β Ti alloys. Temperature-independent modulus, i.e., the Elinvar effect, over a high and broad temperature range (119 °C to 400 °C) was tailored in a solution-treated metastable Ti-15Nb-5Zr-4Sn-1Fe alloy. This Elinvar effect was attained by continued growth and structure transition of the quench-induced trigonal athermal ω phase towards the high modulus thermal-induced hexagonal isothermal ω phase, compensating for the modulus softening of the β matrix due to thermal expansion during heating. Such ω phase-induced Elinvar effect can be tuned by varying heating rates to control the evolution of the ω phase and is potentially attainable in other metastable β-Ti alloys. This study showcases a new strategy for developing Elinvar Ti alloys by engineering the development of ω phase during heating. [Display omitted] [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jmst.2024.11.028
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 6
        StartPage: 159
    Subjects:
      – SubjectFull: Titanium alloys
        Type: general
      – SubjectFull: Heating control
        Type: general
      – SubjectFull: Thermal expansion
        Type: general
      – SubjectFull: X-ray diffraction
        Type: general
      – SubjectFull: High temperatures
        Type: general
    Titles:
      – TitleFull: Engineering omega phase enables a wide temperature range Elinvar effect in metastable β-Ti alloys.
        Type: main
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          Name:
            NameFull: Fu, Yu
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            NameFull: Peng, Huabei
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            NameFull: Wang, Hui
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            NameFull: Wang, Haoliang
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            NameFull: Cheng, Jun
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            NameFull: Wen, Yuhua
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            NameFull: Xiao, Wenlong
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            NameFull: Zhao, Xinqing
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            NameFull: Ma, Chaoli
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          Dates:
            – D: 01
              M: 08
              Text: Aug2025
              Type: published
              Y: 2025
          Identifiers:
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              Value: 10050302
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              Value: 225
          Titles:
            – TitleFull: Journal of Materials Science & Technology
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