Flat hardness distribution in AA6061 joints by linear friction welding

Abstract It is known that one of the main concerns associated with the conventional welding of precipitation-strengthened Al alloys is the formation of softening regions, resulting in the deterioration of mechanical properties. In this study, we show that linear friction welding (LFW) can completely...

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Autores principales:	Jeong-Won Choi, Weihao Li, Kohsaku Ushioda, Hidetoshi Fujii
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b75da6fc65214264b5bda8102613eb94
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spelling	oai:doaj.org-article:b75da6fc65214264b5bda8102613eb942021-12-02T15:02:40ZFlat hardness distribution in AA6061 joints by linear friction welding10.1038/s41598-021-91249-52045-2322https://doaj.org/article/b75da6fc65214264b5bda8102613eb942021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91249-5https://doaj.org/toc/2045-2322Abstract It is known that one of the main concerns associated with the conventional welding of precipitation-strengthened Al alloys is the formation of softening regions, resulting in the deterioration of mechanical properties. In this study, we show that linear friction welding (LFW) can completely suppress softening regions in precipitation-strengthened AA6061-T6 alloy by introducing a large shear strain and by controlling the interfacial temperature. We found that the LFW process resulted in an extremely low interfacial temperature; it decreased as the applied pressure increased from 50 to 240 MPa. This approach can essentially suppress both softening and hardening regions, leading to uniform hardness distribution in Al joints. The high-pressure LFW process demonstrated here can thus provide an innovated guidance to obtain high-performance Al alloy joints and be extended to other precipitation-strengthened Al alloys, which undergo high-temperature softening.Jeong-Won ChoiWeihao LiKohsaku UshiodaHidetoshi FujiiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jeong-Won Choi Weihao Li Kohsaku Ushioda Hidetoshi Fujii Flat hardness distribution in AA6061 joints by linear friction welding
description	Abstract It is known that one of the main concerns associated with the conventional welding of precipitation-strengthened Al alloys is the formation of softening regions, resulting in the deterioration of mechanical properties. In this study, we show that linear friction welding (LFW) can completely suppress softening regions in precipitation-strengthened AA6061-T6 alloy by introducing a large shear strain and by controlling the interfacial temperature. We found that the LFW process resulted in an extremely low interfacial temperature; it decreased as the applied pressure increased from 50 to 240 MPa. This approach can essentially suppress both softening and hardening regions, leading to uniform hardness distribution in Al joints. The high-pressure LFW process demonstrated here can thus provide an innovated guidance to obtain high-performance Al alloy joints and be extended to other precipitation-strengthened Al alloys, which undergo high-temperature softening.
format	article
author	Jeong-Won Choi Weihao Li Kohsaku Ushioda Hidetoshi Fujii
author_facet	Jeong-Won Choi Weihao Li Kohsaku Ushioda Hidetoshi Fujii
author_sort	Jeong-Won Choi
title	Flat hardness distribution in AA6061 joints by linear friction welding
title_short	Flat hardness distribution in AA6061 joints by linear friction welding
title_full	Flat hardness distribution in AA6061 joints by linear friction welding
title_fullStr	Flat hardness distribution in AA6061 joints by linear friction welding
title_full_unstemmed	Flat hardness distribution in AA6061 joints by linear friction welding
title_sort	flat hardness distribution in aa6061 joints by linear friction welding
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b75da6fc65214264b5bda8102613eb94
work_keys_str_mv	AT jeongwonchoi flathardnessdistributioninaa6061jointsbylinearfrictionwelding AT weihaoli flathardnessdistributioninaa6061jointsbylinearfrictionwelding AT kohsakuushioda flathardnessdistributioninaa6061jointsbylinearfrictionwelding AT hidetoshifujii flathardnessdistributioninaa6061jointsbylinearfrictionwelding
_version_	1718389099677614080

Flat hardness distribution in AA6061 joints by linear friction welding

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