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Properties Evaluation of the Welded Joints Made by Disk Laser

The process of laser welding of sheets of HSLA (high-strength low-alloy steel), DP600 (dual-phase steel) and TRIP steels was investigated. A weld was successfully made in a double-sided hot-dip galvanized sheet with a thickness of 0.78–0.81 mm using a laser power of 2 kW per pass without any pretrea...

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Autores principales: Viňáš, Ján, Brezinová, Janette, Sailer, Henrich, Brezina, Jakub, Sahul, Miroslav, Maruschak, Pavlo, Prentkovskis, Olegas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073344/
https://www.ncbi.nlm.nih.gov/pubmed/33923701
http://dx.doi.org/10.3390/ma14082002
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author Viňáš, Ján
Brezinová, Janette
Sailer, Henrich
Brezina, Jakub
Sahul, Miroslav
Maruschak, Pavlo
Prentkovskis, Olegas
author_facet Viňáš, Ján
Brezinová, Janette
Sailer, Henrich
Brezina, Jakub
Sahul, Miroslav
Maruschak, Pavlo
Prentkovskis, Olegas
author_sort Viňáš, Ján
collection PubMed
description The process of laser welding of sheets of HSLA (high-strength low-alloy steel), DP600 (dual-phase steel) and TRIP steels was investigated. A weld was successfully made in a double-sided hot-dip galvanized sheet with a thickness of 0.78–0.81 mm using a laser power of 2 kW per pass without any pretreatment of the weld zone. Microstructure studies revealed the presence of martensitic and ferritic phases in the weld zone, which could be associated with a high rate of its cooling. This made it possible to obtain good strength of the weld, while maintaining sufficient ductility. A relationship between the microstructural features and mechanical properties of welds made in the investigated steels has been established. The highest hardness was found in the alloying region of steels due to the formation of martensite. The hardness test results showed a very narrow soft zone in the heat affected zone (HAZ) adjacent to the weld interface, which does not affect the tensile strength of the weld. The ultimate tensile strength of welds for HSLA steel was 340–450 MPa, for DP600 steel: 580–670 MPa, for TRIP steel: ~700 MPa, respectively, exceeding the strength of base steels.
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spelling pubmed-80733442021-04-27 Properties Evaluation of the Welded Joints Made by Disk Laser Viňáš, Ján Brezinová, Janette Sailer, Henrich Brezina, Jakub Sahul, Miroslav Maruschak, Pavlo Prentkovskis, Olegas Materials (Basel) Article The process of laser welding of sheets of HSLA (high-strength low-alloy steel), DP600 (dual-phase steel) and TRIP steels was investigated. A weld was successfully made in a double-sided hot-dip galvanized sheet with a thickness of 0.78–0.81 mm using a laser power of 2 kW per pass without any pretreatment of the weld zone. Microstructure studies revealed the presence of martensitic and ferritic phases in the weld zone, which could be associated with a high rate of its cooling. This made it possible to obtain good strength of the weld, while maintaining sufficient ductility. A relationship between the microstructural features and mechanical properties of welds made in the investigated steels has been established. The highest hardness was found in the alloying region of steels due to the formation of martensite. The hardness test results showed a very narrow soft zone in the heat affected zone (HAZ) adjacent to the weld interface, which does not affect the tensile strength of the weld. The ultimate tensile strength of welds for HSLA steel was 340–450 MPa, for DP600 steel: 580–670 MPa, for TRIP steel: ~700 MPa, respectively, exceeding the strength of base steels. MDPI 2021-04-16 /pmc/articles/PMC8073344/ /pubmed/33923701 http://dx.doi.org/10.3390/ma14082002 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
Viňáš, Ján
Brezinová, Janette
Sailer, Henrich
Brezina, Jakub
Sahul, Miroslav
Maruschak, Pavlo
Prentkovskis, Olegas
Properties Evaluation of the Welded Joints Made by Disk Laser
title Properties Evaluation of the Welded Joints Made by Disk Laser
title_full Properties Evaluation of the Welded Joints Made by Disk Laser
title_fullStr Properties Evaluation of the Welded Joints Made by Disk Laser
title_full_unstemmed Properties Evaluation of the Welded Joints Made by Disk Laser
title_short Properties Evaluation of the Welded Joints Made by Disk Laser
title_sort properties evaluation of the welded joints made by disk laser
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073344/
https://www.ncbi.nlm.nih.gov/pubmed/33923701
http://dx.doi.org/10.3390/ma14082002
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