Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1

7000 series aluminum alloys have particularly high strength, if compared to other aluminum alloys or even to some high strength steels. Currently, this alloy is considered on the next developments of automotive structures, as an enabler of improved mechanical and safety properties, associated with w...

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Autores principales:	Pedro Bamberg, Gregor Gintrowski, Zeqin Liang, Alexander Schiebahn, Uwe Reisgen, Nico Precoma, Christoph Geffers
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	High strength aluminum alloys AW 7075 Resistance spot welding Lightweight design Body in white Reinforcement of vehicle structures Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/abcfd93d49e540b3b34dba10e3d42145
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spelling	oai:doaj.org-article:abcfd93d49e540b3b34dba10e3d421452021-11-20T05:06:37ZDevelopment of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 12238-785410.1016/j.jmrt.2021.10.142https://doaj.org/article/abcfd93d49e540b3b34dba10e3d421452021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012795https://doaj.org/toc/2238-78547000 series aluminum alloys have particularly high strength, if compared to other aluminum alloys or even to some high strength steels. Currently, this alloy is considered on the next developments of automotive structures, as an enabler of improved mechanical and safety properties, associated with weight reduction, supporting the industry to fulfill fuel economy and greenhouse gases emissions regulations. Due to the proneness to hot cracking and welding embrittlement, the joining of 7000 series sheets is limited to mechanical methods, such as self-piercing rivets.In order to provide the automotive industry with more joining methods suitable for the proposed high strength aluminum alloy, the objective of this work is to validate the resistance spot welding process of the AW-7075 alloy. The work is split in two parts: the preliminary assessment of the suitability of current welding procedures, norms and respective parameters, where the process window, weld nugget quality and electrode life-time are evaluated. Then an innovative approach is investigated, where the use of an upslope welding schedule, CuAg0.1 electrode caps, increased force and lower overall electric resistance could successfully validate the application, attending manufacturing requirements regarding welding quality, electrode life-time and process window. The resultant microstructure characteristics were analyzed with metallographic micro-sections and the phases were determined with the electron backscattered diffraction technique.Pedro BambergGregor GintrowskiZeqin LiangAlexander SchiebahnUwe ReisgenNico PrecomaChristoph GeffersElsevierarticleHigh strength aluminum alloysAW 7075Resistance spot weldingLightweight designBody in whiteReinforcement of vehicle structuresMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5569-5581 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	High strength aluminum alloys AW 7075 Resistance spot welding Lightweight design Body in white Reinforcement of vehicle structures Mining engineering. Metallurgy TN1-997
spellingShingle	High strength aluminum alloys AW 7075 Resistance spot welding Lightweight design Body in white Reinforcement of vehicle structures Mining engineering. Metallurgy TN1-997 Pedro Bamberg Gregor Gintrowski Zeqin Liang Alexander Schiebahn Uwe Reisgen Nico Precoma Christoph Geffers Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1
description	7000 series aluminum alloys have particularly high strength, if compared to other aluminum alloys or even to some high strength steels. Currently, this alloy is considered on the next developments of automotive structures, as an enabler of improved mechanical and safety properties, associated with weight reduction, supporting the industry to fulfill fuel economy and greenhouse gases emissions regulations. Due to the proneness to hot cracking and welding embrittlement, the joining of 7000 series sheets is limited to mechanical methods, such as self-piercing rivets.In order to provide the automotive industry with more joining methods suitable for the proposed high strength aluminum alloy, the objective of this work is to validate the resistance spot welding process of the AW-7075 alloy. The work is split in two parts: the preliminary assessment of the suitability of current welding procedures, norms and respective parameters, where the process window, weld nugget quality and electrode life-time are evaluated. Then an innovative approach is investigated, where the use of an upslope welding schedule, CuAg0.1 electrode caps, increased force and lower overall electric resistance could successfully validate the application, attending manufacturing requirements regarding welding quality, electrode life-time and process window. The resultant microstructure characteristics were analyzed with metallographic micro-sections and the phases were determined with the electron backscattered diffraction technique.
format	article
author	Pedro Bamberg Gregor Gintrowski Zeqin Liang Alexander Schiebahn Uwe Reisgen Nico Precoma Christoph Geffers
author_facet	Pedro Bamberg Gregor Gintrowski Zeqin Liang Alexander Schiebahn Uwe Reisgen Nico Precoma Christoph Geffers
author_sort	Pedro Bamberg
title	Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1
title_short	Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1
title_full	Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1
title_fullStr	Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1
title_full_unstemmed	Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1
title_sort	development of a new approach to resistance spot weld aw-7075 aluminum alloys for structural applications: an experimental study – part 1
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/abcfd93d49e540b3b34dba10e3d42145
work_keys_str_mv	AT pedrobamberg developmentofanewapproachtoresistancespotweldaw7075aluminumalloysforstructuralapplicationsanexperimentalstudypart1 AT gregorgintrowski developmentofanewapproachtoresistancespotweldaw7075aluminumalloysforstructuralapplicationsanexperimentalstudypart1 AT zeqinliang developmentofanewapproachtoresistancespotweldaw7075aluminumalloysforstructuralapplicationsanexperimentalstudypart1 AT alexanderschiebahn developmentofanewapproachtoresistancespotweldaw7075aluminumalloysforstructuralapplicationsanexperimentalstudypart1 AT uwereisgen developmentofanewapproachtoresistancespotweldaw7075aluminumalloysforstructuralapplicationsanexperimentalstudypart1 AT nicoprecoma developmentofanewapproachtoresistancespotweldaw7075aluminumalloysforstructuralapplicationsanexperimentalstudypart1 AT christophgeffers developmentofanewapproachtoresistancespotweldaw7075aluminumalloysforstructuralapplicationsanexperimentalstudypart1
_version_	1718419617204928512

Development of a new approach to resistance spot weld AW-7075 aluminum alloys for structural applications: an experimental study – Part 1

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