Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors

Abstract To elude the strength-electrical conductivity trade-off dilemma, a nanostructuring strategy was achieved in microalloyed Al-0.1wt.% Zr conductor by optimizing the processing route, leading to enhanced strength and simultaneously improved electrical conductivity. The nanostructural design in...

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Autores principales:	S. Y. Jiang, R. H. Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4d5c74ebcffd487a8bd8607a6ec803a8
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spelling	oai:doaj.org-article:4d5c74ebcffd487a8bd8607a6ec803a82021-12-02T15:08:54ZManipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors10.1038/s41598-018-24527-42045-2322https://doaj.org/article/4d5c74ebcffd487a8bd8607a6ec803a82018-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-24527-4https://doaj.org/toc/2045-2322Abstract To elude the strength-electrical conductivity trade-off dilemma, a nanostructuring strategy was achieved in microalloyed Al-0.1wt.% Zr conductor by optimizing the processing route, leading to enhanced strength and simultaneously improved electrical conductivity. The nanostructural design involved ultrafine grains with coherent Al3Zr nanoprecipitates dispersed within the grain interior. The key is to create intragranular coherent Al3Zr nanoprecipitates with size of ~6 nm, which not only produce the highest precipitate hardening but also minimize the local strain field to reduce the scattering of electron motion. According to the targeted nanostructures, the processing route was revised to be artificially aged before cold drawing, instead of the post-aging as traditionally employed. The underlying mechanisms for improvement in strength and electrical conductivity were respectively discussed especially in terms of the coherent Al3Zr nanoprecipitates. It was quantitatively revealed from a strengthening model that the intragranular Al3Zr precipitate hardening was the predominant strengthening mechanism. Experimental results from three-dimensional atom probe (3DAP) demonstrating the Zr atom distribution in matrix as well as the geometrical phase analysis (GPA) results of local strain fields around the precipitates provided evidences to rationalize the promotion in electrical conductivity. The nanostructuring strategy in conjunction with the revised processing route offer a general pathway for manufacturing high-performance Al conductors in large-scale industrial applications.S. Y. JiangR. H. WangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-13 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. Y. Jiang R. H. Wang Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors
description	Abstract To elude the strength-electrical conductivity trade-off dilemma, a nanostructuring strategy was achieved in microalloyed Al-0.1wt.% Zr conductor by optimizing the processing route, leading to enhanced strength and simultaneously improved electrical conductivity. The nanostructural design involved ultrafine grains with coherent Al3Zr nanoprecipitates dispersed within the grain interior. The key is to create intragranular coherent Al3Zr nanoprecipitates with size of ~6 nm, which not only produce the highest precipitate hardening but also minimize the local strain field to reduce the scattering of electron motion. According to the targeted nanostructures, the processing route was revised to be artificially aged before cold drawing, instead of the post-aging as traditionally employed. The underlying mechanisms for improvement in strength and electrical conductivity were respectively discussed especially in terms of the coherent Al3Zr nanoprecipitates. It was quantitatively revealed from a strengthening model that the intragranular Al3Zr precipitate hardening was the predominant strengthening mechanism. Experimental results from three-dimensional atom probe (3DAP) demonstrating the Zr atom distribution in matrix as well as the geometrical phase analysis (GPA) results of local strain fields around the precipitates provided evidences to rationalize the promotion in electrical conductivity. The nanostructuring strategy in conjunction with the revised processing route offer a general pathway for manufacturing high-performance Al conductors in large-scale industrial applications.
format	article
author	S. Y. Jiang R. H. Wang
author_facet	S. Y. Jiang R. H. Wang
author_sort	S. Y. Jiang
title	Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors
title_short	Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors
title_full	Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors
title_fullStr	Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors
title_full_unstemmed	Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors
title_sort	manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed al-zr conductors
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/4d5c74ebcffd487a8bd8607a6ec803a8
work_keys_str_mv	AT syjiang manipulatingnanostructuretosimultaneouslyimprovetheelectricalconductivityandstrengthinmicroalloyedalzrconductors AT rhwang manipulatingnanostructuretosimultaneouslyimprovetheelectricalconductivityandstrengthinmicroalloyedalzrconductors
_version_	1718387996332392448

Manipulating nanostructure to simultaneously improve the electrical conductivity and strength in microalloyed Al-Zr conductors

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