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High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite.

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Title: High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite.
Authors: Burtscher, Michael1 (AUTHOR) michael.burtscher@unileoben.ac.at, Zhao, Mingyue1 (AUTHOR) michael.wurmshuber@unileoben.ac.at, Kappacher, Johann2 (AUTHOR) johann.kappacher@unileoben.ac.at, Leitner, Alexander2 (AUTHOR) alexander.leitner@posteo.at, Wurmshuber, Michael1 (AUTHOR) daniel.kiener@unileoben.ac.at, Pfeifenberger, Manuel3 (AUTHOR) m.pfeifenberger@posteo.de, Maier-Kiener, Verena2 (AUTHOR) verena.maier-kiener@unileoben.ac.at, Kiener, Daniel1 (AUTHOR)
Source: Nanomaterials (2079-4991). Nov2021, Vol. 11 Issue 11, p2951-2951. 1p.
Subjects: Nanoindentation, Strain rate, High temperatures, Young's modulus, Fusion reactors
Abstract: The applicability of nano-crystalline W/Cu composites is governed by their mechanical properties and microstructural stability at high temperatures. Therefore, mechanical and structural investigations of a high-pressure torsion deformed W/Cu nanocomposite were performed up to a temperature of 600 °C. Furthermore, the material was annealed at several temperatures for 1 h within a high-vacuum furnace to determine microstructural changes and surface effects. No significant increase of grain size, but distinct evaporation of the Cu phase accompanied by Cu pool and faceted Cu particle formation could be identified on the specimen′s surface. Additionally, high-temperature nanoindentation and strain rate jump tests were performed to investigate the materials mechanical response at elevated temperatures. Hardness and Young′s modulus decrease were noteworthy due to temperature-induced effects and slight grain growth. The strain rate sensitivity in dependent of the temperature remained constant for the investigated W/Cu composite material. Also, the activation volume of the nano-crystalline composite increased with temperature and behaved similar to coarse-grained W. The current study extends the understanding of the high-temperature behavior of nano-crystalline W/Cu composites within vacuum environments such as future fusion reactors. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) 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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  Data: High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite.
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Nov2021, Vol. 11 Issue 11, p2951-2951. 1p.
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  Data: The applicability of nano-crystalline W/Cu composites is governed by their mechanical properties and microstructural stability at high temperatures. Therefore, mechanical and structural investigations of a high-pressure torsion deformed W/Cu nanocomposite were performed up to a temperature of 600 °C. Furthermore, the material was annealed at several temperatures for 1 h within a high-vacuum furnace to determine microstructural changes and surface effects. No significant increase of grain size, but distinct evaporation of the Cu phase accompanied by Cu pool and faceted Cu particle formation could be identified on the specimen′s surface. Additionally, high-temperature nanoindentation and strain rate jump tests were performed to investigate the materials mechanical response at elevated temperatures. Hardness and Young′s modulus decrease were noteworthy due to temperature-induced effects and slight grain growth. The strain rate sensitivity in dependent of the temperature remained constant for the investigated W/Cu composite material. Also, the activation volume of the nano-crystalline composite increased with temperature and behaved similar to coarse-grained W. The current study extends the understanding of the high-temperature behavior of nano-crystalline W/Cu composites within vacuum environments such as future fusion reactors. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) 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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        Value: 10.3390/nano11112951
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        Text: English
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      – SubjectFull: Nanoindentation
        Type: general
      – SubjectFull: Strain rate
        Type: general
      – SubjectFull: High temperatures
        Type: general
      – SubjectFull: Young's modulus
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      – SubjectFull: Fusion reactors
        Type: general
    Titles:
      – TitleFull: High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite.
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            – D: 01
              M: 11
              Text: Nov2021
              Type: published
              Y: 2021
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