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Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW

Ultrasonic-magnetic field coaxial hybrid GTAW(U-M-GTAW) is a new non-melting electrode welding method proposed by combining ultrasonic assisted GTAW(U-GTAW) and magnetic assisted GTAW(M-GTAW) on the regulation characteristics of the GTAW arc. U-M-GTAW introduces ultrasonic and magnetic field effects...

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Detalles Bibliográficos
Autores principales: Du, Wenbo, Li, Wenlong, Li, Yue, Chen, Chao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9692962/
https://www.ncbi.nlm.nih.gov/pubmed/36431617
http://dx.doi.org/10.3390/ma15228130
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author Du, Wenbo
Li, Wenlong
Li, Yue
Chen, Chao
author_facet Du, Wenbo
Li, Wenlong
Li, Yue
Chen, Chao
author_sort Du, Wenbo
collection PubMed
description Ultrasonic-magnetic field coaxial hybrid GTAW(U-M-GTAW) is a new non-melting electrode welding method proposed by combining ultrasonic assisted GTAW(U-GTAW) and magnetic assisted GTAW(M-GTAW) on the regulation characteristics of the GTAW arc. U-M-GTAW introduces ultrasonic and magnetic field effects into GTAW to improve arc characteristics. The orthogonal experiment was designed to investigate the degree of influence of different process parameters on the arc. The degree of influence of ultrasonic power P, radiator height H, magnetic field current C(W), welding current C(W) and tungsten electrode height H(T) on ΔL(1) (degree of arc root diameter change), ΔL(2) (degree of maximum diameter change) and ΔS (degree of area change) were analyzed. In the parameter range, P has the greatest degree of influence on ΔL(1) and ΔL(2). As all process parameters increase, L(1) shows a tendency to decrease, indicating an increase in the compression of the arc root. ΔL(2) with the increase in P and C(W) shows a trend of first decreasing and then increasing. ΔL(2) with the increase in H decreases, indicating that the acoustic radiation force increases, the arc energy increases, and the dark region decreases. The magnetic field current increases, the bottom of the arc expands, and the height of the tungsten electrode increases, the arc dispersion and thus the difference between the dark and luminous regions at the bottom increases, resulting in ΔL(2) with the increase in C(M) and H(T) increases. C(W) has the greatest degree of influence on ΔS. ΔS decreases and then increases as P and H increase, which indicates that the force on acoustic radiation increases and then decreases in the range. An increase in the magnetic field current increases the rotation of the arc, leading to an increase in the arc area. An increase in welding current leads to an increase in arc energy, expansion of the arc morphology, and an increase in ΔS. The tungsten electrode height increases, the arc diverges, the dark region increases, the luminous area decreases, and ΔS increases. Finally, combined with the analysis of ultrasonic field and magnetic field theory, changes in process parameters will affect the force of the arc and thus the arc morphology. The U-M-GTAW arc under the action of acoustic radiation force, the plasma flow is shifted in the direction of the arc axis, and the arc contraction, under the action of magnetic field force to generate circumferential current, the arc undergoes periodic rotation, which improves GTAW arc characteristics.
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spelling pubmed-96929622022-11-26 Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW Du, Wenbo Li, Wenlong Li, Yue Chen, Chao Materials (Basel) Article Ultrasonic-magnetic field coaxial hybrid GTAW(U-M-GTAW) is a new non-melting electrode welding method proposed by combining ultrasonic assisted GTAW(U-GTAW) and magnetic assisted GTAW(M-GTAW) on the regulation characteristics of the GTAW arc. U-M-GTAW introduces ultrasonic and magnetic field effects into GTAW to improve arc characteristics. The orthogonal experiment was designed to investigate the degree of influence of different process parameters on the arc. The degree of influence of ultrasonic power P, radiator height H, magnetic field current C(W), welding current C(W) and tungsten electrode height H(T) on ΔL(1) (degree of arc root diameter change), ΔL(2) (degree of maximum diameter change) and ΔS (degree of area change) were analyzed. In the parameter range, P has the greatest degree of influence on ΔL(1) and ΔL(2). As all process parameters increase, L(1) shows a tendency to decrease, indicating an increase in the compression of the arc root. ΔL(2) with the increase in P and C(W) shows a trend of first decreasing and then increasing. ΔL(2) with the increase in H decreases, indicating that the acoustic radiation force increases, the arc energy increases, and the dark region decreases. The magnetic field current increases, the bottom of the arc expands, and the height of the tungsten electrode increases, the arc dispersion and thus the difference between the dark and luminous regions at the bottom increases, resulting in ΔL(2) with the increase in C(M) and H(T) increases. C(W) has the greatest degree of influence on ΔS. ΔS decreases and then increases as P and H increase, which indicates that the force on acoustic radiation increases and then decreases in the range. An increase in the magnetic field current increases the rotation of the arc, leading to an increase in the arc area. An increase in welding current leads to an increase in arc energy, expansion of the arc morphology, and an increase in ΔS. The tungsten electrode height increases, the arc diverges, the dark region increases, the luminous area decreases, and ΔS increases. Finally, combined with the analysis of ultrasonic field and magnetic field theory, changes in process parameters will affect the force of the arc and thus the arc morphology. The U-M-GTAW arc under the action of acoustic radiation force, the plasma flow is shifted in the direction of the arc axis, and the arc contraction, under the action of magnetic field force to generate circumferential current, the arc undergoes periodic rotation, which improves GTAW arc characteristics. MDPI 2022-11-16 /pmc/articles/PMC9692962/ /pubmed/36431617 http://dx.doi.org/10.3390/ma15228130 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
Du, Wenbo
Li, Wenlong
Li, Yue
Chen, Chao
Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW
title Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW
title_full Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW
title_fullStr Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW
title_full_unstemmed Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW
title_short Arc Characteristics of Ultrasonic-Magnetic Coaxial Hybrid GTAW
title_sort arc characteristics of ultrasonic-magnetic coaxial hybrid gtaw
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9692962/
https://www.ncbi.nlm.nih.gov/pubmed/36431617
http://dx.doi.org/10.3390/ma15228130
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