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Characterization of Friction Stir and TIG Welded CK45 Carbon Steel

The present paper aims to compare the microstructural and mechanical properties of CK45 carbon steel plates, joined by friction stir (FSW) and tungsten inert gas (TIG) welding methods. Besides visual inspection, the welded joints and the base material were subsequently evaluated in respect of optica...

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Autores principales: Rafati, Mohammadreza, Mostafapour, Amir, Laieghi, Hossein, Somani, Mahesh Chandra, Kömi, Jukka
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8347938/
https://www.ncbi.nlm.nih.gov/pubmed/34361292
http://dx.doi.org/10.3390/ma14154098
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author Rafati, Mohammadreza
Mostafapour, Amir
Laieghi, Hossein
Somani, Mahesh Chandra
Kömi, Jukka
author_facet Rafati, Mohammadreza
Mostafapour, Amir
Laieghi, Hossein
Somani, Mahesh Chandra
Kömi, Jukka
author_sort Rafati, Mohammadreza
collection PubMed
description The present paper aims to compare the microstructural and mechanical properties of CK45 carbon steel plates, joined by friction stir (FSW) and tungsten inert gas (TIG) welding methods. Besides visual inspection, the welded joints and the base material were subsequently evaluated in respect of optical microstructures, hardness and tensile properties. Sound joints could be accomplished using both the FSW and TIG welding methods through proper selection of process parameters and the filler metal. The influence of a water-cooling system on the FSW and various filler metals on the quality of TIG welding were further assessed. Both the FS welded sample as well as TIG welded samples with two different filler metals ER70S-6 and ER80S-B2 exhibited brittle behavior that could be mitigated through optimized water cooling and use of R60 filler metal. A drastic reduction of brittle martensite phase constituent in the microstructure corroborated significant improvements in mechanical properties of the welded zones for both the FSW sample as well as TIG welded samples with R60 filler metal.
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spelling pubmed-83479382021-08-08 Characterization of Friction Stir and TIG Welded CK45 Carbon Steel Rafati, Mohammadreza Mostafapour, Amir Laieghi, Hossein Somani, Mahesh Chandra Kömi, Jukka Materials (Basel) Article The present paper aims to compare the microstructural and mechanical properties of CK45 carbon steel plates, joined by friction stir (FSW) and tungsten inert gas (TIG) welding methods. Besides visual inspection, the welded joints and the base material were subsequently evaluated in respect of optical microstructures, hardness and tensile properties. Sound joints could be accomplished using both the FSW and TIG welding methods through proper selection of process parameters and the filler metal. The influence of a water-cooling system on the FSW and various filler metals on the quality of TIG welding were further assessed. Both the FS welded sample as well as TIG welded samples with two different filler metals ER70S-6 and ER80S-B2 exhibited brittle behavior that could be mitigated through optimized water cooling and use of R60 filler metal. A drastic reduction of brittle martensite phase constituent in the microstructure corroborated significant improvements in mechanical properties of the welded zones for both the FSW sample as well as TIG welded samples with R60 filler metal. MDPI 2021-07-23 /pmc/articles/PMC8347938/ /pubmed/34361292 http://dx.doi.org/10.3390/ma14154098 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rafati, Mohammadreza
Mostafapour, Amir
Laieghi, Hossein
Somani, Mahesh Chandra
Kömi, Jukka
Characterization of Friction Stir and TIG Welded CK45 Carbon Steel
title Characterization of Friction Stir and TIG Welded CK45 Carbon Steel
title_full Characterization of Friction Stir and TIG Welded CK45 Carbon Steel
title_fullStr Characterization of Friction Stir and TIG Welded CK45 Carbon Steel
title_full_unstemmed Characterization of Friction Stir and TIG Welded CK45 Carbon Steel
title_short Characterization of Friction Stir and TIG Welded CK45 Carbon Steel
title_sort characterization of friction stir and tig welded ck45 carbon steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8347938/
https://www.ncbi.nlm.nih.gov/pubmed/34361292
http://dx.doi.org/10.3390/ma14154098
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