Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing

The quantitative concentration of alloying elements in low-alloyed copper alloys is an important factor in forming electrical and mechanical characteristics. It is known that severe plastic deformation is accompanied by both a substantial refinement of the structure and changes in the kinetics of ph...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Denis A. Aksenov, Rashid N. Asfandiyarov, Georgy I. Raab, Elvira I. Fakhretdinova, Maria A. Shishkunova
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	high-speed railway line contact wire SPD nanotechnology electrical conductivity strength Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/65ead71c4d6141808b0a919134a04cc9
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:65ead71c4d6141808b0a919134a04cc9
record_format	dspace
spelling	oai:doaj.org-article:65ead71c4d6141808b0a919134a04cc92021-11-25T18:22:01ZInfluence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing10.3390/met111117952075-4701https://doaj.org/article/65ead71c4d6141808b0a919134a04cc92021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1795https://doaj.org/toc/2075-4701The quantitative concentration of alloying elements in low-alloyed copper alloys is an important factor in forming electrical and mechanical characteristics. It is known that severe plastic deformation is accompanied by both a substantial refinement of the structure and changes in the kinetics of phase transformations during the deformation and the post-deformation thermal treatment. This paper presents the results of a comparative analysis of the Cu–0.2Cr and Cu–1.1Cr alloys subjected to equal-channel angular pressing at room temperature. The analysis was performed for the grain structure, solid solution, and second-phase particles using transmission electron microscopy, scanning electron microscopy, X-ray crystal analysis, and the small-angle diffraction method. It was found that the level of structure refinement and mechanical characteristics after equal-channel angular pressing was almost the same for both studied alloys. Post-deformation aging of the Cu–0.2Cr alloy leads to the development of polygonization and re-crystallization within it. The aging of the Cu–1.1Cr alloy shows a better thermal stability than that of the Cu–0.2Cr alloy. In the Cu–1.1Cr alloy, after aging, in comparison with Cu–0.2Cr, a denser-packed ensemble of fine particles with an average size of 54 ± 2 nm is formed. In this case, the average size of fragments is 270 ± 15 nm and the ultimate tensile strength reaches 485 MPa.Denis A. AksenovRashid N. AsfandiyarovGeorgy I. RaabElvira I. FakhretdinovaMaria A. ShishkunovaMDPI AGarticlehigh-speed railway linecontact wireSPDnanotechnologyelectrical conductivitystrengthMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1795, p 1795 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-speed railway line contact wire SPD nanotechnology electrical conductivity strength Mining engineering. Metallurgy TN1-997
spellingShingle	high-speed railway line contact wire SPD nanotechnology electrical conductivity strength Mining engineering. Metallurgy TN1-997 Denis A. Aksenov Rashid N. Asfandiyarov Georgy I. Raab Elvira I. Fakhretdinova Maria A. Shishkunova Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing
description	The quantitative concentration of alloying elements in low-alloyed copper alloys is an important factor in forming electrical and mechanical characteristics. It is known that severe plastic deformation is accompanied by both a substantial refinement of the structure and changes in the kinetics of phase transformations during the deformation and the post-deformation thermal treatment. This paper presents the results of a comparative analysis of the Cu–0.2Cr and Cu–1.1Cr alloys subjected to equal-channel angular pressing at room temperature. The analysis was performed for the grain structure, solid solution, and second-phase particles using transmission electron microscopy, scanning electron microscopy, X-ray crystal analysis, and the small-angle diffraction method. It was found that the level of structure refinement and mechanical characteristics after equal-channel angular pressing was almost the same for both studied alloys. Post-deformation aging of the Cu–0.2Cr alloy leads to the development of polygonization and re-crystallization within it. The aging of the Cu–1.1Cr alloy shows a better thermal stability than that of the Cu–0.2Cr alloy. In the Cu–1.1Cr alloy, after aging, in comparison with Cu–0.2Cr, a denser-packed ensemble of fine particles with an average size of 54 ± 2 nm is formed. In this case, the average size of fragments is 270 ± 15 nm and the ultimate tensile strength reaches 485 MPa.
format	article
author	Denis A. Aksenov Rashid N. Asfandiyarov Georgy I. Raab Elvira I. Fakhretdinova Maria A. Shishkunova
author_facet	Denis A. Aksenov Rashid N. Asfandiyarov Georgy I. Raab Elvira I. Fakhretdinova Maria A. Shishkunova
author_sort	Denis A. Aksenov
title	Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing
title_short	Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing
title_full	Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing
title_fullStr	Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing
title_full_unstemmed	Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing
title_sort	influence of the chromium content in low-alloyed cu–cr alloys on the structural changes, phase transformations and properties in equal-channel angular pressing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/65ead71c4d6141808b0a919134a04cc9
work_keys_str_mv	AT denisaaksenov influenceofthechromiumcontentinlowalloyedcucralloysonthestructuralchangesphasetransformationsandpropertiesinequalchannelangularpressing AT rashidnasfandiyarov influenceofthechromiumcontentinlowalloyedcucralloysonthestructuralchangesphasetransformationsandpropertiesinequalchannelangularpressing AT georgyiraab influenceofthechromiumcontentinlowalloyedcucralloysonthestructuralchangesphasetransformationsandpropertiesinequalchannelangularpressing AT elviraifakhretdinova influenceofthechromiumcontentinlowalloyedcucralloysonthestructuralchangesphasetransformationsandpropertiesinequalchannelangularpressing AT mariaashishkunova influenceofthechromiumcontentinlowalloyedcucralloysonthestructuralchangesphasetransformationsandpropertiesinequalchannelangularpressing
_version_	1718411261178281984

Influence of the Chromium Content in Low-Alloyed Cu–Cr Alloys on the Structural Changes, Phase Transformations and Properties in Equal-Channel Angular Pressing

Ejemplares similares