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Breakdown of Varvenne scaling in (AuNiPdPt)1−xCu high-entropy alloys

Thiel, F. and Utt, D. and Kauffmann, A. and Nielsch, K. and Albe, K. and Heilmaier, M. and Freudenberger, J. (2020):
Breakdown of Varvenne scaling in (AuNiPdPt)1−xCu high-entropy alloys.
181, In: Scripta Materialia, pp. 15-18. ISSN 13596462,
DOI: 10.1016/j.scriptamat.2020.02.007,
[Article]

Abstract

The compositional dependence of the yield strength σ_y has been studied for a series of polycrystalline (AuNiPdPt)_1-xCu_x alloys by means of compression tests. σ_y is found to decrease linearly with increasing Cu concentration. This behaviour is in contradiction to the generalised theory for solid solution strengthening in concentrated solid solutions provided by Varvenne et al. [1]. A breakdown of the scaling behaviour is found as σ_y should be non-linear and slightly increasing when modifying the composition from AuNiPdPt to AuCuNiPdPt.

Item Type: Article
Erschienen: 2020
Creators: Thiel, F. and Utt, D. and Kauffmann, A. and Nielsch, K. and Albe, K. and Heilmaier, M. and Freudenberger, J.
Title: Breakdown of Varvenne scaling in (AuNiPdPt)1−xCu high-entropy alloys
Language: English
Abstract:

The compositional dependence of the yield strength σ_y has been studied for a series of polycrystalline (AuNiPdPt)_1-xCu_x alloys by means of compression tests. σ_y is found to decrease linearly with increasing Cu concentration. This behaviour is in contradiction to the generalised theory for solid solution strengthening in concentrated solid solutions provided by Varvenne et al. [1]. A breakdown of the scaling behaviour is found as σ_y should be non-linear and slightly increasing when modifying the composition from AuNiPdPt to AuCuNiPdPt.

Journal or Publication Title: Scripta Materialia
Volume: 181
Uncontrolled Keywords: High-entropy alloys, Noble metals, Mechanical properties, Solution strengthening, Yield stress predictions
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 21 Apr 2020 05:42
DOI: 10.1016/j.scriptamat.2020.02.007
Official URL: https://doi.org/10.1016/j.scriptamat.2020.02.007
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