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Metallurgical and Materials Transactions A
Published in: Metallurgical and Materials Transactions A 4/2021

22-02-2021 | Brief Communication

Formation Mechanism of Layered Structure Near Fusion Boundary in Dissimilar-Filler Welding of Aluminum Alloys

Authors: Qipeng Dong, Xiaming Chen, Hiromi Nagaumi, Qingyu Zhang, Xiaonan Wang, Minqi Sheng, Bo Zhang, Xinzhong Li

Published in: Metallurgical and Materials Transactions A | Issue 4/2021

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Abstract

This study presents the formation mechanism of a layered structure consisting of coherent cellular and columnar solidification microstructure accompanied with the macrosegregation in aluminum dissimilar-filler welding. The filler-depleted zone resulted from the incomplete mixing of the solute; moreover, it solidifies before the surrounding mixed zone, wherein the subsequent dendritic growth is hindered by the pre-solidified microstructure. This solidification sequence leads to a layered solidification microstructure and segregation patterns.
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Appendix
Available only for authorised users
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Metadata
Title
Formation Mechanism of Layered Structure Near Fusion Boundary in Dissimilar-Filler Welding of Aluminum Alloys
Authors
Qipeng Dong
Xiaming Chen
Hiromi Nagaumi
Qingyu Zhang
Xiaonan Wang
Minqi Sheng
Bo Zhang
Xinzhong Li
Publication date
22-02-2021
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 4/2021
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-021-06146-3

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