Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion

Extrusion experiments and 3D numerical modeling were conducted to investigate the dynamic recrystallization and welding quality of a 6063 aluminum alloy hollow square tube extruded by a porthole die at the ram speeds of 3 mm/s, 7 mm/s, 9 mm/s and 11 mm/s. The results showed that average grain size o...

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Autores principales:	Shikang Li, Luoxing Li, Zhiwen Liu, Guan Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ram speed dynamic recrystallization weld quality porthole die extrusion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/8672c2cbfb074c6d825679e2ad90a64c
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spelling	oai:doaj.org-article:8672c2cbfb074c6d825679e2ad90a64c2021-11-11T18:07:50ZMicrostructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion10.3390/ma142165841996-1944https://doaj.org/article/8672c2cbfb074c6d825679e2ad90a64c2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6584https://doaj.org/toc/1996-1944Extrusion experiments and 3D numerical modeling were conducted to investigate the dynamic recrystallization and welding quality of a 6063 aluminum alloy hollow square tube extruded by a porthole die at the ram speeds of 3 mm/s, 7 mm/s, 9 mm/s and 11 mm/s. The results showed that average grain size of hollow square tube extruded at the ram speed of 7 mm/s was the smallest. The profile extruded at the ram speed of 3 mm/s exhibited the highest expansion ratio. Dynamic recrystallization (DRX) fractions were highly variable at different ram speeds. DRX fractions in the matrix zones were higher than those in the welding zones, resulting in smaller grain sizes in the matrix zones. Mechanical properties in the welding zones and matrix zones was different. A local strain concentration would occurred during expansion, which would affect the welding quality. Finally, it was found that the uniform microstructure near the welding line would also affect the welding quality.Shikang LiLuoxing LiZhiwen LiuGuan WangMDPI AGarticleram speeddynamic recrystallizationweld qualityporthole die extrusionTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6584, p 6584 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ram speed dynamic recrystallization weld quality porthole die extrusion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	ram speed dynamic recrystallization weld quality porthole die extrusion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Shikang Li Luoxing Li Zhiwen Liu Guan Wang Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion
description	Extrusion experiments and 3D numerical modeling were conducted to investigate the dynamic recrystallization and welding quality of a 6063 aluminum alloy hollow square tube extruded by a porthole die at the ram speeds of 3 mm/s, 7 mm/s, 9 mm/s and 11 mm/s. The results showed that average grain size of hollow square tube extruded at the ram speed of 7 mm/s was the smallest. The profile extruded at the ram speed of 3 mm/s exhibited the highest expansion ratio. Dynamic recrystallization (DRX) fractions were highly variable at different ram speeds. DRX fractions in the matrix zones were higher than those in the welding zones, resulting in smaller grain sizes in the matrix zones. Mechanical properties in the welding zones and matrix zones was different. A local strain concentration would occurred during expansion, which would affect the welding quality. Finally, it was found that the uniform microstructure near the welding line would also affect the welding quality.
format	article
author	Shikang Li Luoxing Li Zhiwen Liu Guan Wang
author_facet	Shikang Li Luoxing Li Zhiwen Liu Guan Wang
author_sort	Shikang Li
title	Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion
title_short	Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion
title_full	Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion
title_fullStr	Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion
title_full_unstemmed	Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion
title_sort	microstructure and its influence on the welding quality of 6063 aluminum alloy porthole die extrusion
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8672c2cbfb074c6d825679e2ad90a64c
work_keys_str_mv	AT shikangli microstructureanditsinfluenceontheweldingqualityof6063aluminumalloyportholedieextrusion AT luoxingli microstructureanditsinfluenceontheweldingqualityof6063aluminumalloyportholedieextrusion AT zhiwenliu microstructureanditsinfluenceontheweldingqualityof6063aluminumalloyportholedieextrusion AT guanwang microstructureanditsinfluenceontheweldingqualityof6063aluminumalloyportholedieextrusion
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Microstructure and Its Influence on the Welding Quality of 6063 Aluminum Alloy Porthole Die Extrusion

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