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Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints

The temperature and material flow gradients along the thick section of the weld seriously affect the welding efficiency of friction stir welding in medium-thick plates. Here, the effects of different gradients obtained by the two pins on the weld formation, microstructure, and mechanical properties...

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Autores principales: Ma, Xiaotian, Xu, Shuangming, Wang, Feifan, Zhao, Yaobang, Meng, Xiangchen, Xie, Yuming, Wan, Long, Huang, Yongxian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9571721/
https://www.ncbi.nlm.nih.gov/pubmed/36233931
http://dx.doi.org/10.3390/ma15196579
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author Ma, Xiaotian
Xu, Shuangming
Wang, Feifan
Zhao, Yaobang
Meng, Xiangchen
Xie, Yuming
Wan, Long
Huang, Yongxian
author_facet Ma, Xiaotian
Xu, Shuangming
Wang, Feifan
Zhao, Yaobang
Meng, Xiangchen
Xie, Yuming
Wan, Long
Huang, Yongxian
author_sort Ma, Xiaotian
collection PubMed
description The temperature and material flow gradients along the thick section of the weld seriously affect the welding efficiency of friction stir welding in medium-thick plates. Here, the effects of different gradients obtained by the two pins on the weld formation, microstructure, and mechanical properties were compared. The results indicated that the large-tip pin increases heat input and material flow at the bottom, reducing the gradient along the thickness. The large-tip pin increases the welding speed of defect-free joints from 100 mm/min to 500 mm/min compared to the small-tip pin. The ultimate tensile strength and elongation of the joint reached 247 MPa and 8.7%, equal to 80% and 65% of the base metal, respectively. Therefore, reducing the temperature and material flow gradients along the thickness by designing the pin structure is proved to be the key to improving the welding efficiency for thick plates.
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spelling pubmed-95717212022-10-17 Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints Ma, Xiaotian Xu, Shuangming Wang, Feifan Zhao, Yaobang Meng, Xiangchen Xie, Yuming Wan, Long Huang, Yongxian Materials (Basel) Article The temperature and material flow gradients along the thick section of the weld seriously affect the welding efficiency of friction stir welding in medium-thick plates. Here, the effects of different gradients obtained by the two pins on the weld formation, microstructure, and mechanical properties were compared. The results indicated that the large-tip pin increases heat input and material flow at the bottom, reducing the gradient along the thickness. The large-tip pin increases the welding speed of defect-free joints from 100 mm/min to 500 mm/min compared to the small-tip pin. The ultimate tensile strength and elongation of the joint reached 247 MPa and 8.7%, equal to 80% and 65% of the base metal, respectively. Therefore, reducing the temperature and material flow gradients along the thickness by designing the pin structure is proved to be the key to improving the welding efficiency for thick plates. MDPI 2022-09-22 /pmc/articles/PMC9571721/ /pubmed/36233931 http://dx.doi.org/10.3390/ma15196579 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
Ma, Xiaotian
Xu, Shuangming
Wang, Feifan
Zhao, Yaobang
Meng, Xiangchen
Xie, Yuming
Wan, Long
Huang, Yongxian
Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints
title Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints
title_full Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints
title_fullStr Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints
title_full_unstemmed Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints
title_short Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints
title_sort effect of temperature and material flow gradients on mechanical performances of friction stir welded aa6082-t6 joints
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9571721/
https://www.ncbi.nlm.nih.gov/pubmed/36233931
http://dx.doi.org/10.3390/ma15196579
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