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Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion

The aim of this work was to study the influence of severe plastic deformation (SPD) on the dissolution of silver particles in Cu–8wt.%Ag alloys. In order to obtain different morphologies of silver particles, samples were annealed at 400, 500 and 600 °C. Subsequently, the material was subjected to hi...

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Autores principales: Korneva, Anna, Straumal, Boris, Kilmametov, Askar, Chulist, Robert, Cios, Grzegorz, Baretzky, Brigitte, Zięba, Paweł
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6385164/
https://www.ncbi.nlm.nih.gov/pubmed/30717126
http://dx.doi.org/10.3390/ma12030447
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author Korneva, Anna
Straumal, Boris
Kilmametov, Askar
Chulist, Robert
Cios, Grzegorz
Baretzky, Brigitte
Zięba, Paweł
author_facet Korneva, Anna
Straumal, Boris
Kilmametov, Askar
Chulist, Robert
Cios, Grzegorz
Baretzky, Brigitte
Zięba, Paweł
author_sort Korneva, Anna
collection PubMed
description The aim of this work was to study the influence of severe plastic deformation (SPD) on the dissolution of silver particles in Cu–8wt.%Ag alloys. In order to obtain different morphologies of silver particles, samples were annealed at 400, 500 and 600 °C. Subsequently, the material was subjected to high pressure torsion (HPT) at room temperature. By means of scanning and transmission electron microscopy, as well as X-ray diffraction techniques, it was found that during SPD, the dissolution of second phase was strongly affected by the morphology and volume fraction of the precipitates in the initial state. Small, heterogeneous precipitates of irregular shape dissolved more easily than those of large size, round-shaped and uniform composition. It was also found that HPT led to the increase of solubility limit of silver in the copper matrix as the result of dissolution of the second phase. This unusual phase transition is discussed with respect to diffusion activation energy and mixing enthalpy of the alloying elements.
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spelling pubmed-63851642019-02-23 Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion Korneva, Anna Straumal, Boris Kilmametov, Askar Chulist, Robert Cios, Grzegorz Baretzky, Brigitte Zięba, Paweł Materials (Basel) Article The aim of this work was to study the influence of severe plastic deformation (SPD) on the dissolution of silver particles in Cu–8wt.%Ag alloys. In order to obtain different morphologies of silver particles, samples were annealed at 400, 500 and 600 °C. Subsequently, the material was subjected to high pressure torsion (HPT) at room temperature. By means of scanning and transmission electron microscopy, as well as X-ray diffraction techniques, it was found that during SPD, the dissolution of second phase was strongly affected by the morphology and volume fraction of the precipitates in the initial state. Small, heterogeneous precipitates of irregular shape dissolved more easily than those of large size, round-shaped and uniform composition. It was also found that HPT led to the increase of solubility limit of silver in the copper matrix as the result of dissolution of the second phase. This unusual phase transition is discussed with respect to diffusion activation energy and mixing enthalpy of the alloying elements. MDPI 2019-02-01 /pmc/articles/PMC6385164/ /pubmed/30717126 http://dx.doi.org/10.3390/ma12030447 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Korneva, Anna
Straumal, Boris
Kilmametov, Askar
Chulist, Robert
Cios, Grzegorz
Baretzky, Brigitte
Zięba, Paweł
Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion
title Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion
title_full Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion
title_fullStr Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion
title_full_unstemmed Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion
title_short Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion
title_sort dissolution of ag precipitates in the cu–8wt.%ag alloy deformed by high pressure torsion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6385164/
https://www.ncbi.nlm.nih.gov/pubmed/30717126
http://dx.doi.org/10.3390/ma12030447
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