Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current

Al–Li alloy has been widely used in the aerospace field owing to its high strength and low density. In this study, alternating current cold metal transfer (AC CMT) along with a high-frequency pulse current technique was used to weld a 2060 Al–Li alloy using an ER5356 wire. The effect of pulse freque...

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Autores principales:	Wang Liwei, Hu Huan, Yan Huan, Liu Ying, Wu Ziqin, Narayanaswamy Balaji, Liang Zhimin, Wang Dianlong
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	high-frequency ac cmt 2060 al–li alloy arc characteristics mechanical properties Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
Acceso en línea:	https://doaj.org/article/40b8867413a1487fa59f51838e9e1b38
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spelling	oai:doaj.org-article:40b8867413a1487fa59f51838e9e1b382021-12-05T14:10:50ZMicrostructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current2191-032410.1515/htmp-2021-0026https://doaj.org/article/40b8867413a1487fa59f51838e9e1b382021-06-01T00:00:00Zhttps://doi.org/10.1515/htmp-2021-0026https://doaj.org/toc/2191-0324Al–Li alloy has been widely used in the aerospace field owing to its high strength and low density. In this study, alternating current cold metal transfer (AC CMT) along with a high-frequency pulse current technique was used to weld a 2060 Al–Li alloy using an ER5356 wire. The effect of pulse frequency on the arc shape, microstructure, and mechanical properties of the welded joints was examined, and mechanical performance testing was conducted. The results revealed that the arc diameter, arc length, and arc volume showed a trend of increasing first and then decreasing with an increase in the pulse frequency and reached their peak values when the pulse frequency was 50 kHz. Coupling the welding process with a high-frequency pulse resulted in grain refinement, which was attributed to the stirring action of the arc force. Both the porosity levels and grain size decreased with increasing frequency. When the pulse frequency was 70 kHz, the porosity level was the lowest, and the grain size was refined to 24.1 μm. The tensile strength of the welded joints also increased with the pulse frequency, and a maximum tensile strength of 249 MPa was observed at 70 kHz.Wang LiweiHu HuanYan HuanLiu YingWu ZiqinNarayanaswamy BalajiLiang ZhiminWang DianlongDe Gruyterarticlehigh-frequencyac cmt2060 al–li alloyarc characteristicsmechanical propertiesTechnologyTChemical technologyTP1-1185Chemicals: Manufacture, use, etc.TP200-248ENHigh Temperature Materials and Processes, Vol 40, Iss 1, Pp 214-227 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-frequency ac cmt 2060 al–li alloy arc characteristics mechanical properties Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
spellingShingle	high-frequency ac cmt 2060 al–li alloy arc characteristics mechanical properties Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 Wang Liwei Hu Huan Yan Huan Liu Ying Wu Ziqin Narayanaswamy Balaji Liang Zhimin Wang Dianlong Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current
description	Al–Li alloy has been widely used in the aerospace field owing to its high strength and low density. In this study, alternating current cold metal transfer (AC CMT) along with a high-frequency pulse current technique was used to weld a 2060 Al–Li alloy using an ER5356 wire. The effect of pulse frequency on the arc shape, microstructure, and mechanical properties of the welded joints was examined, and mechanical performance testing was conducted. The results revealed that the arc diameter, arc length, and arc volume showed a trend of increasing first and then decreasing with an increase in the pulse frequency and reached their peak values when the pulse frequency was 50 kHz. Coupling the welding process with a high-frequency pulse resulted in grain refinement, which was attributed to the stirring action of the arc force. Both the porosity levels and grain size decreased with increasing frequency. When the pulse frequency was 70 kHz, the porosity level was the lowest, and the grain size was refined to 24.1 μm. The tensile strength of the welded joints also increased with the pulse frequency, and a maximum tensile strength of 249 MPa was observed at 70 kHz.
format	article
author	Wang Liwei Hu Huan Yan Huan Liu Ying Wu Ziqin Narayanaswamy Balaji Liang Zhimin Wang Dianlong
author_facet	Wang Liwei Hu Huan Yan Huan Liu Ying Wu Ziqin Narayanaswamy Balaji Liang Zhimin Wang Dianlong
author_sort	Wang Liwei
title	Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current
title_short	Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current
title_full	Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current
title_fullStr	Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current
title_full_unstemmed	Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current
title_sort	microstructure and mechanical properties of 2060 al–li alloy welded by alternating current cold metal transfer with high-frequency pulse current
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/40b8867413a1487fa59f51838e9e1b38
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Microstructure and mechanical properties of 2060 Al–Li alloy welded by alternating current cold metal transfer with high-frequency pulse current

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