Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT

Abstract Composite structures made of 2 mm-thick titanium and 10 mm-thick carbon steel are widely used in infrastructures such as long-distance gas transportation. However, cracking, which is caused by intermetallic compounds (ICs), is a dominate failure mode in welds of this structure. Thus, a comm...

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Autores principales:	Z. Y. Zhu, Y. L. Liu, G. Q. Gou, W Gao, J. Chen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d0dec96010ab48edb6cf78ea5fac549e
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spelling	oai:doaj.org-article:d0dec96010ab48edb6cf78ea5fac549e2021-12-02T15:36:14ZEffect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT10.1038/s41598-021-89343-92045-2322https://doaj.org/article/d0dec96010ab48edb6cf78ea5fac549e2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89343-9https://doaj.org/toc/2045-2322Abstract Composite structures made of 2 mm-thick titanium and 10 mm-thick carbon steel are widely used in infrastructures such as long-distance gas transportation. However, cracking, which is caused by intermetallic compounds (ICs), is a dominate failure mode in welds of this structure. Thus, a common way to improve the in-service life of is reduce the number of ICs. In this paper, we employ a novel hybrid welding method to fabricate composite structures of TA2 titanium and Q235 carbon steel. Specifically, Ti and carbon steel is welded by laser and double Cold Metal Transfer (CMT) welding, respectively. The microstructure near the interface of Ti and steel is then examined using SEM, EBSD, EDS, with emphasis on the ICs in terms of chemical elements and morphologies. Results show that FeTi and Fe2Ti are the main ICs near the interface, and responsible for the failure of the welds. The effect of welding heat input on the formation of ICs is investigated as well. Results show that ICs are smaller when the heat input is low. Under low heat input circumstance, the tensile strength of the weld can reach up to 420 MPa.Z. Y. ZhuY. L. LiuG. Q. GouW GaoJ. ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Z. Y. Zhu Y. L. Liu G. Q. Gou W Gao J. Chen Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT
description	Abstract Composite structures made of 2 mm-thick titanium and 10 mm-thick carbon steel are widely used in infrastructures such as long-distance gas transportation. However, cracking, which is caused by intermetallic compounds (ICs), is a dominate failure mode in welds of this structure. Thus, a common way to improve the in-service life of is reduce the number of ICs. In this paper, we employ a novel hybrid welding method to fabricate composite structures of TA2 titanium and Q235 carbon steel. Specifically, Ti and carbon steel is welded by laser and double Cold Metal Transfer (CMT) welding, respectively. The microstructure near the interface of Ti and steel is then examined using SEM, EBSD, EDS, with emphasis on the ICs in terms of chemical elements and morphologies. Results show that FeTi and Fe2Ti are the main ICs near the interface, and responsible for the failure of the welds. The effect of welding heat input on the formation of ICs is investigated as well. Results show that ICs are smaller when the heat input is low. Under low heat input circumstance, the tensile strength of the weld can reach up to 420 MPa.
format	article
author	Z. Y. Zhu Y. L. Liu G. Q. Gou W Gao J. Chen
author_facet	Z. Y. Zhu Y. L. Liu G. Q. Gou W Gao J. Chen
author_sort	Z. Y. Zhu
title	Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT
title_short	Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT
title_full	Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT
title_fullStr	Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT
title_full_unstemmed	Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT
title_sort	effect of heat input on interfacial characterization of the butter joint of hot-rolling cp-ti/q235 bimetallic sheets by laser + cmt
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d0dec96010ab48edb6cf78ea5fac549e
work_keys_str_mv	AT zyzhu effectofheatinputoninterfacialcharacterizationofthebutterjointofhotrollingcptiq235bimetallicsheetsbylasercmt AT ylliu effectofheatinputoninterfacialcharacterizationofthebutterjointofhotrollingcptiq235bimetallicsheetsbylasercmt AT gqgou effectofheatinputoninterfacialcharacterizationofthebutterjointofhotrollingcptiq235bimetallicsheetsbylasercmt AT wgao effectofheatinputoninterfacialcharacterizationofthebutterjointofhotrollingcptiq235bimetallicsheetsbylasercmt AT jchen effectofheatinputoninterfacialcharacterizationofthebutterjointofhotrollingcptiq235bimetallicsheetsbylasercmt
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Effect of heat input on interfacial characterization of the butter joint of hot-rolling CP-Ti/Q235 bimetallic sheets by Laser + CMT

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