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

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...

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Autores principales:	Michael Burtscher, Mingyue Zhao, Johann Kappacher, Alexander Leitner, Michael Wurmshuber, Manuel Pfeifenberger, Verena Maier-Kiener, Daniel Kiener
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	W/Cu composite nanocrystalline high-pressure torsion microstructure nanoindentation Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/d421a500befa426b8edb8243d9ff6f1a
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spelling	oai:doaj.org-article:d421a500befa426b8edb8243d9ff6f1a2021-11-25T18:31:06ZHigh-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite10.3390/nano111129512079-4991https://doaj.org/article/d421a500befa426b8edb8243d9ff6f1a2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2951https://doaj.org/toc/2079-4991The 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.Michael BurtscherMingyue ZhaoJohann KappacherAlexander LeitnerMichael WurmshuberManuel PfeifenbergerVerena Maier-KienerDaniel KienerMDPI AGarticleW/Cu compositenanocrystallinehigh-pressure torsionmicrostructurenanoindentationChemistryQD1-999ENNanomaterials, Vol 11, Iss 2951, p 2951 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	W/Cu composite nanocrystalline high-pressure torsion microstructure nanoindentation Chemistry QD1-999
spellingShingle	W/Cu composite nanocrystalline high-pressure torsion microstructure nanoindentation Chemistry QD1-999 Michael Burtscher Mingyue Zhao Johann Kappacher Alexander Leitner Michael Wurmshuber Manuel Pfeifenberger Verena Maier-Kiener Daniel Kiener High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite
description	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.
format	article
author	Michael Burtscher Mingyue Zhao Johann Kappacher Alexander Leitner Michael Wurmshuber Manuel Pfeifenberger Verena Maier-Kiener Daniel Kiener
author_facet	Michael Burtscher Mingyue Zhao Johann Kappacher Alexander Leitner Michael Wurmshuber Manuel Pfeifenberger Verena Maier-Kiener Daniel Kiener
author_sort	Michael Burtscher
title	High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite
title_short	High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite
title_full	High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite
title_fullStr	High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite
title_full_unstemmed	High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite
title_sort	high-temperature nanoindentation of an advanced nano-crystalline w/cu composite
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d421a500befa426b8edb8243d9ff6f1a
work_keys_str_mv	AT michaelburtscher hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite AT mingyuezhao hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite AT johannkappacher hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite AT alexanderleitner hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite AT michaelwurmshuber hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite AT manuelpfeifenberger hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite AT verenamaierkiener hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite AT danielkiener hightemperaturenanoindentationofanadvancednanocrystallinewcucomposite
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High-Temperature Nanoindentation of an Advanced Nano-Crystalline W/Cu Composite

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