Experimental and numerical analysis of intermetallics in Al–Mg friction stir welds
In this research work, it was aimed to analyse the thermal behaviour during FSW in order to understand the diffusion behaviour of Al (AA6061)-Mg (AZ31B) dissimilar joints. Three heat input levels at different weld pitch ratios (WPR) of 0.087, 0.068 and 0.051 are accounted for the analysis. Finite el...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ad09a8 |
| _version_ | 1797627652435083264 |
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| author | M Naveenkumar M Subramanian R Ranjith |
| author_facet | M Naveenkumar M Subramanian R Ranjith |
| author_sort | M Naveenkumar |
| collection | DOAJ |
| description | In this research work, it was aimed to analyse the thermal behaviour during FSW in order to understand the diffusion behaviour of Al (AA6061)-Mg (AZ31B) dissimilar joints. Three heat input levels at different weld pitch ratios (WPR) of 0.087, 0.068 and 0.051 are accounted for the analysis. Finite element modelling (FEM) is employed to predict temperature evolutions. From the FEM results and fundamental diffusion equations, the intermetallic thickness and the diffusion behaviour between the Al and Mg material were analyzed and found that the Al-rich intermetallic phases Al _3 Mg _2 grow faster and wider than the Mg-rich phase Al _12 Mg _17 . Tensile test demonstrates that a lower welding pitch ratio (WPR) leads to the formation of thicker intermetallic layers, resulting in reduced tensile strength and joint efficiency. In contrast, a higher WPR (0.087) minimizes intermetallic thickness, yielding superior tensile properties (138mpa). Microhardness measurements at the stir zone reveal a broad range from 70 to 164 HV, signifying mechanical heterogeneity. Microstructural reveals that a complex interplay between Al and Mg materials, resulting in fine equiaxed grains, intermetallic compounds, and distinct flow patterns in the stir zone. |
| first_indexed | 2024-03-11T10:27:24Z |
| format | Article |
| id | doaj.art-28f78b7d2a514c16a5b57cf12de3962f |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-11T10:27:24Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-28f78b7d2a514c16a5b57cf12de3962f2023-11-15T11:03:22ZengIOP PublishingMaterials Research Express2053-15912023-01-01101111651110.1088/2053-1591/ad09a8Experimental and numerical analysis of intermetallics in Al–Mg friction stir weldsM Naveenkumar0https://orcid.org/0000-0001-8022-2049M Subramanian1https://orcid.org/0000-0002-1979-1733R Ranjith2https://orcid.org/0000-0001-5278-5039Department of Mechanical Engineering, Arjun College of Technology , Coimbatore, IndiaDepartment of Mechanical Engineering, SNS College of Technology , Coimbatore, IndiaDepartment of Mechanical Engineering, SNS College of Technology , Coimbatore, IndiaIn this research work, it was aimed to analyse the thermal behaviour during FSW in order to understand the diffusion behaviour of Al (AA6061)-Mg (AZ31B) dissimilar joints. Three heat input levels at different weld pitch ratios (WPR) of 0.087, 0.068 and 0.051 are accounted for the analysis. Finite element modelling (FEM) is employed to predict temperature evolutions. From the FEM results and fundamental diffusion equations, the intermetallic thickness and the diffusion behaviour between the Al and Mg material were analyzed and found that the Al-rich intermetallic phases Al _3 Mg _2 grow faster and wider than the Mg-rich phase Al _12 Mg _17 . Tensile test demonstrates that a lower welding pitch ratio (WPR) leads to the formation of thicker intermetallic layers, resulting in reduced tensile strength and joint efficiency. In contrast, a higher WPR (0.087) minimizes intermetallic thickness, yielding superior tensile properties (138mpa). Microhardness measurements at the stir zone reveal a broad range from 70 to 164 HV, signifying mechanical heterogeneity. Microstructural reveals that a complex interplay between Al and Mg materials, resulting in fine equiaxed grains, intermetallic compounds, and distinct flow patterns in the stir zone.https://doi.org/10.1088/2053-1591/ad09a8aluminium alloymagnesium alloyfriction stir weldingheat inputfinite element methoddiffusion |
| spellingShingle | M Naveenkumar M Subramanian R Ranjith Experimental and numerical analysis of intermetallics in Al–Mg friction stir welds Materials Research Express aluminium alloy magnesium alloy friction stir welding heat input finite element method diffusion |
| title | Experimental and numerical analysis of intermetallics in Al–Mg friction stir welds |
| title_full | Experimental and numerical analysis of intermetallics in Al–Mg friction stir welds |
| title_fullStr | Experimental and numerical analysis of intermetallics in Al–Mg friction stir welds |
| title_full_unstemmed | Experimental and numerical analysis of intermetallics in Al–Mg friction stir welds |
| title_short | Experimental and numerical analysis of intermetallics in Al–Mg friction stir welds |
| title_sort | experimental and numerical analysis of intermetallics in al mg friction stir welds |
| topic | aluminium alloy magnesium alloy friction stir welding heat input finite element method diffusion |
| url | https://doi.org/10.1088/2053-1591/ad09a8 |
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