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Study on factors affecting the droplet temperature in plasma MIG welding process

In the present study, the mechanism to control droplet temperature in the plasma MIG welding was discussed based on the measurements of the droplet temperature for a wide range of MIG currents with different plasma electrode diameters. The measurements of the droplet temperatures were conducted usin...

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Main Authors: Mamat, Sarizam, Tashiro, Shinichi, Tanaka, Manabu, Yusoff, Mahani
Format: Indexed Article
Published: 2018
Online Access:http://discol.umk.edu.my/id/eprint/7370/
https://iopscience.iop.org/article/10.1088/1361-6463/aab128
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spelling my.umk.eprints.73702022-05-23T09:58:13Z http://discol.umk.edu.my/id/eprint/7370/ Study on factors affecting the droplet temperature in plasma MIG welding process Mamat, Sarizam Tashiro, Shinichi Tanaka, Manabu Yusoff, Mahani In the present study, the mechanism to control droplet temperature in the plasma MIG welding was discussed based on the measurements of the droplet temperature for a wide range of MIG currents with different plasma electrode diameters. The measurements of the droplet temperatures were conducted using a two color temperature measurement method. The droplet temperatures in the plasma MIG welding were then compared with those in the conventional MIG welding. As a result, the droplet temperature in the plasma MIG welding was found to be reduced in comparison with the conventional MIG welding under the same MIG current. Especially, when the small plasma electrode diameter was used, the decrease in the droplet temperature reached maximally 500 K. Also for a particular WFS, the droplet temperatures in the plasma MIG welding were lower than those in the conventional MIG welding. It is suggested that the use of plasma contributes to reduce the local heat input into the base metal by the droplet. The presence of the plasma surrounding the wire is considered to increase the electron density in its vicinity, resulting in the arc attachment to expand upwards along the wire surface to disperse the MIG current. This dispersion of MIG current causes a decrease in current density on the droplet surface, lowering the droplet temperature. Furthermore, dispersed MIG current also weakens the electromagnetic pinch force acting on the neck of the wire above the droplet. This leads to a larger droplet diameter with increased surface area through lower frequency of droplet detachment to decrease the MIG current density on the droplet surface, as compared to the conventional MIG welding at the same MIG current. Thus, the lower droplet temperature is caused by the reduction of heat flux into the droplet. Consequently, the mechanism to control droplet temperature in the plasma MIG welding was clarified. 2018 Indexed Article NonPeerReviewed Mamat, Sarizam and Tashiro, Shinichi and Tanaka, Manabu and Yusoff, Mahani (2018) Study on factors affecting the droplet temperature in plasma MIG welding process. Journal of Physics D: Applied Physics, 51 (13). pp. 1-56. ISSN 0022-3727 https://iopscience.iop.org/article/10.1088/1361-6463/aab128
institution Universiti Malaysia Kelantan
building Perpustakaan Universiti Malaysia Kelantan
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Kelantan
content_source UMK Institutional Repository
url_provider http://umkeprints.umk.edu.my/
description In the present study, the mechanism to control droplet temperature in the plasma MIG welding was discussed based on the measurements of the droplet temperature for a wide range of MIG currents with different plasma electrode diameters. The measurements of the droplet temperatures were conducted using a two color temperature measurement method. The droplet temperatures in the plasma MIG welding were then compared with those in the conventional MIG welding. As a result, the droplet temperature in the plasma MIG welding was found to be reduced in comparison with the conventional MIG welding under the same MIG current. Especially, when the small plasma electrode diameter was used, the decrease in the droplet temperature reached maximally 500 K. Also for a particular WFS, the droplet temperatures in the plasma MIG welding were lower than those in the conventional MIG welding. It is suggested that the use of plasma contributes to reduce the local heat input into the base metal by the droplet. The presence of the plasma surrounding the wire is considered to increase the electron density in its vicinity, resulting in the arc attachment to expand upwards along the wire surface to disperse the MIG current. This dispersion of MIG current causes a decrease in current density on the droplet surface, lowering the droplet temperature. Furthermore, dispersed MIG current also weakens the electromagnetic pinch force acting on the neck of the wire above the droplet. This leads to a larger droplet diameter with increased surface area through lower frequency of droplet detachment to decrease the MIG current density on the droplet surface, as compared to the conventional MIG welding at the same MIG current. Thus, the lower droplet temperature is caused by the reduction of heat flux into the droplet. Consequently, the mechanism to control droplet temperature in the plasma MIG welding was clarified.
format Indexed Article
author Mamat, Sarizam
Tashiro, Shinichi
Tanaka, Manabu
Yusoff, Mahani
spellingShingle Mamat, Sarizam
Tashiro, Shinichi
Tanaka, Manabu
Yusoff, Mahani
Study on factors affecting the droplet temperature in plasma MIG welding process
author_facet Mamat, Sarizam
Tashiro, Shinichi
Tanaka, Manabu
Yusoff, Mahani
author_sort Mamat, Sarizam
title Study on factors affecting the droplet temperature in plasma MIG welding process
title_short Study on factors affecting the droplet temperature in plasma MIG welding process
title_full Study on factors affecting the droplet temperature in plasma MIG welding process
title_fullStr Study on factors affecting the droplet temperature in plasma MIG welding process
title_full_unstemmed Study on factors affecting the droplet temperature in plasma MIG welding process
title_sort study on factors affecting the droplet temperature in plasma mig welding process
publishDate 2018
url http://discol.umk.edu.my/id/eprint/7370/
https://iopscience.iop.org/article/10.1088/1361-6463/aab128
_version_ 1763303831862509568
score 13.211869

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