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Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process

This paper presents an original design of a test apparatus for calorimetric measurements of arc efficiency η and melting efficiency η(m) in welding processes. The construction and principle of operation of a new flow calorimeter are described, as well as the method for determining the η and η(m) val...

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Autores principales: Mróz, Marek, Orłowicz, Antoni Władysław, Lenik, Magdalena, Trytek, Andrzej, Tupaj, Mirosław
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9607354/
https://www.ncbi.nlm.nih.gov/pubmed/36295454
http://dx.doi.org/10.3390/ma15207389
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author Mróz, Marek
Orłowicz, Antoni Władysław
Lenik, Magdalena
Trytek, Andrzej
Tupaj, Mirosław
author_facet Mróz, Marek
Orłowicz, Antoni Władysław
Lenik, Magdalena
Trytek, Andrzej
Tupaj, Mirosław
author_sort Mróz, Marek
collection PubMed
description This paper presents an original design of a test apparatus for calorimetric measurements of arc efficiency η and melting efficiency η(m) in welding processes. The construction and principle of operation of a new flow calorimeter are described, as well as the method for determining the η and η(m) values in the process of the surface melting of aluminium–silicon alloy casting surfaces with a concentrated heat flux generated by the TIG (Tungsten Inert Gas) method. The results obtained indicate the advisability of using calorimetric testing to assess the arc efficiency of welding processes. It was demonstrated that changing the welding current and arc scanning speed, as well as changing the chemical composition of the silumin, has an effect on the arc efficiency value η. This has the effect of introducing a different amount of heat into the area of the heated material. The consequence of this is a change in the value of the melting efficiency η(m), which results in a change in the width and depth of the surface melting areas, through this, the cooling conditions of the material. As is well known, this will affect the microstructure of the welds and the width and microstructure of the heat-affected zone, and thus the performance of the welded joints.
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spelling pubmed-96073542022-10-28 Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process Mróz, Marek Orłowicz, Antoni Władysław Lenik, Magdalena Trytek, Andrzej Tupaj, Mirosław Materials (Basel) Article This paper presents an original design of a test apparatus for calorimetric measurements of arc efficiency η and melting efficiency η(m) in welding processes. The construction and principle of operation of a new flow calorimeter are described, as well as the method for determining the η and η(m) values in the process of the surface melting of aluminium–silicon alloy casting surfaces with a concentrated heat flux generated by the TIG (Tungsten Inert Gas) method. The results obtained indicate the advisability of using calorimetric testing to assess the arc efficiency of welding processes. It was demonstrated that changing the welding current and arc scanning speed, as well as changing the chemical composition of the silumin, has an effect on the arc efficiency value η. This has the effect of introducing a different amount of heat into the area of the heated material. The consequence of this is a change in the value of the melting efficiency η(m), which results in a change in the width and depth of the surface melting areas, through this, the cooling conditions of the material. As is well known, this will affect the microstructure of the welds and the width and microstructure of the heat-affected zone, and thus the performance of the welded joints. MDPI 2022-10-21 /pmc/articles/PMC9607354/ /pubmed/36295454 http://dx.doi.org/10.3390/ma15207389 Text en © 2022 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
Mróz, Marek
Orłowicz, Antoni Władysław
Lenik, Magdalena
Trytek, Andrzej
Tupaj, Mirosław
Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process
title Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process
title_full Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process
title_fullStr Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process
title_full_unstemmed Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process
title_short Calorimetric Method for the Testing of Thermal Coefficients of the TIG Process
title_sort calorimetric method for the testing of thermal coefficients of the tig process
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9607354/
https://www.ncbi.nlm.nih.gov/pubmed/36295454
http://dx.doi.org/10.3390/ma15207389
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