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Phase transformations and metastable states in a Cu-20 m.% Sn alloy: An integrated HEXRD, TEM, and APT investigation.

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Title: Phase transformations and metastable states in a Cu-20 m.% Sn alloy: An integrated HEXRD, TEM, and APT investigation.
Authors: Lumper-Wimler, Lea A.1 (AUTHOR), Burtscher, Michael1 (AUTHOR), Musi, Michael1 (AUTHOR), Obersteiner, David1 (AUTHOR), Fellner, Simon2 (AUTHOR), Gammer, Christoph2 (AUTHOR), Stark, Andreas3 (AUTHOR), Schillinger, Wolfram4 (AUTHOR), Maier-Kiener, Verena1 (AUTHOR) verena.maier-kiener@unileoben.ac.at
Source: Journal of Alloys & Compounds. May2025, Vol. 1026, pN.PAG-N.PAG. 1p.
Subjects: Atom-probe tomography, Scanning transmission electron microscopy, Martensitic transformations, Metastable states, Transmission electron microscopy, Copper-tin alloys
Abstract: This study explores the phase transformations and metastable states in a Cu-20 m.% Sn alloy, focusing on both stable and martensitic phases. High-energy X-ray diffraction (HEXRD) analyses revealed a metastable phase range between 200°C and 375°C. Identifying phases within this range was challenging due to the incomplete crystallographic descriptions of reported phases in the literature. Correlative transmission electron microscopy analysis identified three different phases, assigning α′ and β phases with certainty and tentatively designating a third phase as β 1 ′′. Further confirmation using HEXRD was inconclusive due to the limited available data on the structure of β 1 ′′. Atom probe tomography supported the presence of β 1 ′′ by revealing distinct chemical regions, correlating the α′ and β 1 ′′ phases, and indicating coupled growth as lamellar precipitates. Despite limited descriptions of β 1 ′′, additional HEXRD investigations suggested its metastability. Martensitic transformation conditions were analyzed, showing that the α′ + β 1 ′′ phases can be induced through aging, contrary to existing literature. Comparative diffractogram analysis, including a direct comparison of the metastable phases with the diffractogram of a cymbal – known for its exceptional acoustic properties – suggests that the α′ + β 1 ′′ phases could similarly enhance acoustic performance, expanding the understanding and potential applications of Cu-Sn alloys. [Display omitted] • Uncovered metastable range in Cu-20Sn (200–375°C) via DSC & HEXRD. • β 1 ′′ phase identification impossible due to incomplete literature. • Aging induces metastable α′+ β 1 ′′ phases, expanding transformation conditions. • α′+ β 1 ′′ phases may boost acoustic performance in Cu-20Sn instruments. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. 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: 184752872
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  Label: Title
  Group: Ti
  Data: Phase transformations and metastable states in a Cu-20 m.% Sn alloy: An integrated HEXRD, TEM, and APT investigation.
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  Data: <searchLink fieldCode="AR" term="%22Lumper-Wimler%2C+Lea+A%2E%22">Lumper-Wimler, Lea A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Burtscher%2C+Michael%22">Burtscher, Michael</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Musi%2C+Michael%22">Musi, Michael</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Obersteiner%2C+David%22">Obersteiner, David</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fellner%2C+Simon%22">Fellner, Simon</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gammer%2C+Christoph%22">Gammer, Christoph</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stark%2C+Andreas%22">Stark, Andreas</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schillinger%2C+Wolfram%22">Schillinger, Wolfram</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maier-Kiener%2C+Verena%22">Maier-Kiener, Verena</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> verena.maier-kiener@unileoben.ac.at</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Alloys+%26+Compounds%22">Journal of Alloys & Compounds</searchLink>. May2025, Vol. 1026, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Atom-probe+tomography%22">Atom-probe tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+transmission+electron+microscopy%22">Scanning transmission electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Martensitic+transformations%22">Martensitic transformations</searchLink><br /><searchLink fieldCode="DE" term="%22Metastable+states%22">Metastable states</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopy%22">Transmission electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Copper-tin+alloys%22">Copper-tin alloys</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study explores the phase transformations and metastable states in a Cu-20 m.% Sn alloy, focusing on both stable and martensitic phases. High-energy X-ray diffraction (HEXRD) analyses revealed a metastable phase range between 200°C and 375°C. Identifying phases within this range was challenging due to the incomplete crystallographic descriptions of reported phases in the literature. Correlative transmission electron microscopy analysis identified three different phases, assigning α′ and β phases with certainty and tentatively designating a third phase as β 1 ′′. Further confirmation using HEXRD was inconclusive due to the limited available data on the structure of β 1 ′′. Atom probe tomography supported the presence of β 1 ′′ by revealing distinct chemical regions, correlating the α′ and β 1 ′′ phases, and indicating coupled growth as lamellar precipitates. Despite limited descriptions of β 1 ′′, additional HEXRD investigations suggested its metastability. Martensitic transformation conditions were analyzed, showing that the α′ + β 1 ′′ phases can be induced through aging, contrary to existing literature. Comparative diffractogram analysis, including a direct comparison of the metastable phases with the diffractogram of a cymbal – known for its exceptional acoustic properties – suggests that the α′ + β 1 ′′ phases could similarly enhance acoustic performance, expanding the understanding and potential applications of Cu-Sn alloys. [Display omitted] • Uncovered metastable range in Cu-20Sn (200–375°C) via DSC & HEXRD. • β 1 ′′ phase identification impossible due to incomplete literature. • Aging induces metastable α′+ β 1 ′′ phases, expanding transformation conditions. • α′+ β 1 ′′ phases may boost acoustic performance in Cu-20Sn instruments. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. 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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      – Type: doi
        Value: 10.1016/j.jallcom.2025.180399
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Atom-probe tomography
        Type: general
      – SubjectFull: Scanning transmission electron microscopy
        Type: general
      – SubjectFull: Martensitic transformations
        Type: general
      – SubjectFull: Metastable states
        Type: general
      – SubjectFull: Transmission electron microscopy
        Type: general
      – SubjectFull: Copper-tin alloys
        Type: general
    Titles:
      – TitleFull: Phase transformations and metastable states in a Cu-20 m.% Sn alloy: An integrated HEXRD, TEM, and APT investigation.
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            – D: 05
              M: 05
              Text: May2025
              Type: published
              Y: 2025
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