Precision control of microstructure variation and tensile properties in dissimilar friction stir lap welding joints using an adjustable tool

Kar, Amlan; Morisada, Yoshiaki; Sharma, Abhishek et al.

Scientific Reports, 2025, 15(1), 27330

Number of Access:0（2025-11-20 12:55 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/102936

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Title
Precision control of microstructure variation and tensile properties in dissimilar friction stir lap welding joints using an adjustable tool
Creator
CreatorName
Kar, Amlan
NRID
1000000416356 1000000416356
researchmap permalink
morisada morisada
CreatorName
Morisada, Yoshiaki
NRID
1000050993705 1000050993705
ORCID
0000-0002-3384-861X 0000-0002-3384-861X
researchmap permalink
sharma_abhishek sharma_abhishek
Scopus Author ID
57214356255 57214356255
CreatorName
Sharma, Abhishek
NRID
1000000247230 1000000247230
ORCID
0000-0002-5023-3844 0000-0002-5023-3844
researchmap permalink
read0051741 read0051741
Scopus Author ID
7403071460 7403071460
CreatorName
Fujii, Hidetoshi
Subject
Adjustable too
Dissimilar friction stir lap welding
Intercalated structure
Microstructure evolution
Probe rotation speed
Shear strength
Weld interface morphology
Description
Kar A., Morisada Y., Sharma A., et al. Precision control of microstructure variation and tensile properties in dissimilar friction stir lap welding joints using an adjustable tool. Scientific Reports 15, 27330 (2025); https://doi.org/10.1038/s41598-025-12738-5.
Abstract
Friction-assisted plastic deformation at the joint interface is essential for achieving the desired joint properties in dissimilar friction stir lap welding (FSLW) of aluminum alloy (Al) with steel (Fe). This plastic deformation can be precisely controlled by using an adjustable tool, where shoulder and probe rotation speeds are independently controlled. This study explores the effect of microstructure evolution and probe rotation speed on the weld’s interface morphology and tensile properties of FSLW joints between an aluminum alloy and steel using an adjustable tool. Microstructure evolution is influenced by inherent material properties and process-induced stress inhomogeneity. Grain refinement in Fe is more gradual compared to Al, which exhibits a homogenous microstructure. Lower probe rotation speeds lead to more significant grain refinement in Al, while increasing probe rotation speeds promote the formation of intermetallic compounds. An intercalated structure with varying fractions and morphology is observed across the joint interface in all welds. The controlled evolution of microstructure and the differences in intercalated structure formation at the weld interface are attributed to variations in shear strength. This study demonstrates the ability of an adjustable tool to tailor the microstructure and tensile properties of FSLW joints, providing a promising approach for enhancing joint performance in dissimilar metal joining applications.
Publisher
Nature Research
Source Title
Scientific Reports
Volume (Issue)
15(1)
Page
27330
Date of Issued
2025-07-27
Language
English
Handle URL
https://hdl.handle.net/11094/102936
eISSN
20452322
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1038/s41598-025-12738-5
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article