Cargando…

Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field

The 6061 aluminum alloy and 304 stainless steel were welded by hybrid cold metal transfer (CMT) welding with external axial magnetic field. The effects of magnetic intensity and frequency on joint microstructure and mechanical properties were studied. It was found that the magnetic field can promote...

Descripción completa

Detalles Bibliográficos
Autores principales: Kang, Kexin, Liu, Yibo, Li, Junzhao, Liu, Chao, Zhen, Zuyang, Wang, Yaxin, Sun, Qingjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7475898/
https://www.ncbi.nlm.nih.gov/pubmed/32823965
http://dx.doi.org/10.3390/ma13163601
_version_ 1783579610171047936
author Kang, Kexin
Liu, Yibo
Li, Junzhao
Liu, Chao
Zhen, Zuyang
Wang, Yaxin
Sun, Qingjie
author_facet Kang, Kexin
Liu, Yibo
Li, Junzhao
Liu, Chao
Zhen, Zuyang
Wang, Yaxin
Sun, Qingjie
author_sort Kang, Kexin
collection PubMed
description The 6061 aluminum alloy and 304 stainless steel were welded by hybrid cold metal transfer (CMT) welding with external axial magnetic field. The effects of magnetic intensity and frequency on joint microstructure and mechanical properties were studied. It was found that the magnetic field can promote the spreading of aluminum weld metal on the steel surface and thus increase the bonding area of Al/steel butt joint. The welding process stability improved, while the wetting behavior worsened with the introduction of alternating frequencies. The thickness of the intermetallic compound (IMC) layer at Al/steel interface was reduced to 3 μm with the coil current of 2 A. The application of the magnetic field promoted the aggregation of Si atoms at the interface and inhibited the formation of brittle (Al, Si)(13)Fe(4) phase. The fracture paths were transformed from (Al, Si)(13)Fe(4) layer to Al(8)Fe(2)Si layer with the application of the magnetic field. The maximum tensile strength reached 130.2 MPa, an increase of 61.6% in comparison to the normal CMT process.
format Online
Article
Text
id pubmed-7475898
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-74758982020-09-17 Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field Kang, Kexin Liu, Yibo Li, Junzhao Liu, Chao Zhen, Zuyang Wang, Yaxin Sun, Qingjie Materials (Basel) Article The 6061 aluminum alloy and 304 stainless steel were welded by hybrid cold metal transfer (CMT) welding with external axial magnetic field. The effects of magnetic intensity and frequency on joint microstructure and mechanical properties were studied. It was found that the magnetic field can promote the spreading of aluminum weld metal on the steel surface and thus increase the bonding area of Al/steel butt joint. The welding process stability improved, while the wetting behavior worsened with the introduction of alternating frequencies. The thickness of the intermetallic compound (IMC) layer at Al/steel interface was reduced to 3 μm with the coil current of 2 A. The application of the magnetic field promoted the aggregation of Si atoms at the interface and inhibited the formation of brittle (Al, Si)(13)Fe(4) phase. The fracture paths were transformed from (Al, Si)(13)Fe(4) layer to Al(8)Fe(2)Si layer with the application of the magnetic field. The maximum tensile strength reached 130.2 MPa, an increase of 61.6% in comparison to the normal CMT process. MDPI 2020-08-14 /pmc/articles/PMC7475898/ /pubmed/32823965 http://dx.doi.org/10.3390/ma13163601 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kang, Kexin
Liu, Yibo
Li, Junzhao
Liu, Chao
Zhen, Zuyang
Wang, Yaxin
Sun, Qingjie
Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field
title Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field
title_full Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field
title_fullStr Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field
title_full_unstemmed Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field
title_short Microstructure and Mechanical Properties of Al/Steel Butt Joint by Hybrid CMT Welding with External Axial Magnetic Field
title_sort microstructure and mechanical properties of al/steel butt joint by hybrid cmt welding with external axial magnetic field
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7475898/
https://www.ncbi.nlm.nih.gov/pubmed/32823965
http://dx.doi.org/10.3390/ma13163601
work_keys_str_mv AT kangkexin microstructureandmechanicalpropertiesofalsteelbuttjointbyhybridcmtweldingwithexternalaxialmagneticfield
AT liuyibo microstructureandmechanicalpropertiesofalsteelbuttjointbyhybridcmtweldingwithexternalaxialmagneticfield
AT lijunzhao microstructureandmechanicalpropertiesofalsteelbuttjointbyhybridcmtweldingwithexternalaxialmagneticfield
AT liuchao microstructureandmechanicalpropertiesofalsteelbuttjointbyhybridcmtweldingwithexternalaxialmagneticfield
AT zhenzuyang microstructureandmechanicalpropertiesofalsteelbuttjointbyhybridcmtweldingwithexternalaxialmagneticfield
AT wangyaxin microstructureandmechanicalpropertiesofalsteelbuttjointbyhybridcmtweldingwithexternalaxialmagneticfield
AT sunqingjie microstructureandmechanicalpropertiesofalsteelbuttjointbyhybridcmtweldingwithexternalaxialmagneticfield