Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy Joints
Friction welding of aluminum alloys holds immense potential for replacing riveted joints in the structural sections of the aeronautical and automotive sectors. This research aims to investigate the effects on the microstructural and mechanical properties when AA5083 H116 joints are subjected to rota...
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MDPI AG
2023-07-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/7/1119 |
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| author | Aditya M. Mahajan K. Vamsi Krishna M. J. Quamar Ateekh Ur Rehman Bharath Bandi N. Kishore Babu |
| author_facet | Aditya M. Mahajan K. Vamsi Krishna M. J. Quamar Ateekh Ur Rehman Bharath Bandi N. Kishore Babu |
| author_sort | Aditya M. Mahajan |
| collection | DOAJ |
| description | Friction welding of aluminum alloys holds immense potential for replacing riveted joints in the structural sections of the aeronautical and automotive sectors. This research aims to investigate the effects on the microstructural and mechanical properties when AA5083 H116 joints are subjected to rotary friction welding. To evaluate the quality of the welds, optical and scanning electron microanalysis techniques were utilized, revealing the formation of sound welds without porosity. The microstructural examination revealed distinct weld zones within the weldment, including the dynamically recrystallized zone (DRZ), thermo-mechanically affected zone (TMAZ), heat-affected zone (HAZ), and base metal (BM). During the friction-welding process, grain refinement occurred, leading to the development of fine equiaxed grains in the DRZ/weld zone. Tensile testing revealed that the weldment exhibited higher strength (YS: 301 ± 6 MPa; UTS: 425 ± 7 MPa) in the BM region compared to the base metal (YS: 207 ± 5 MPa; UTS: 385 ± 9 MPa). However, the weldment demonstrated slightly lower elongation (%El: 13 ± 2) compared to the base metal (%El: 15 ± 3). The decrease in ductility observed in the weldment can be attributed to the presence of distinct weld zones within the welded sample. Also, the tensile graph of the BM showed serrations throughout the curve, which is a characteristic phenomenon known as the Portevin–Le Chatelier effect (serrated yielding) in Al-Mg alloys. This effect occurs due to the influence of dynamic strain aging on the material’s macroscopic plastic deformation. Fractography analysis showcased a wide range of dimple sizes, indicating a ductile fracture mode in the weldment. These findings contribute to understanding the microstructural and mechanical behavior of AA5083 H116 joints subjected to rotary friction welding. |
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| last_indexed | 2024-03-11T01:11:13Z |
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| series | Crystals |
| spelling | doaj.art-ee9cf1e3681f487e803328b0d2a0e6382023-11-18T18:54:45ZengMDPI AGCrystals2073-43522023-07-01137111910.3390/cryst13071119Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy JointsAditya M. Mahajan0K. Vamsi Krishna1M. J. Quamar2Ateekh Ur Rehman3Bharath Bandi4N. Kishore Babu5Department of Metallurgical and Materials Engineering, National Institute of Technology Warangal, Warangal 506004, IndiaDepartment of Metallurgical and Materials Engineering, National Institute of Technology Warangal, Warangal 506004, IndiaDepartment of Metallurgical and Materials Engineering, National Institute of Technology Warangal, Warangal 506004, IndiaDepartment of Industrial Engineering, College of Engineering, King Saud University, Riyadh 11451, Saudi ArabiaWarwick Manufacturing Group (WMG), University of Warwick, Coventry CV4 7AL, UKDepartment of Metallurgical and Materials Engineering, National Institute of Technology Warangal, Warangal 506004, IndiaFriction welding of aluminum alloys holds immense potential for replacing riveted joints in the structural sections of the aeronautical and automotive sectors. This research aims to investigate the effects on the microstructural and mechanical properties when AA5083 H116 joints are subjected to rotary friction welding. To evaluate the quality of the welds, optical and scanning electron microanalysis techniques were utilized, revealing the formation of sound welds without porosity. The microstructural examination revealed distinct weld zones within the weldment, including the dynamically recrystallized zone (DRZ), thermo-mechanically affected zone (TMAZ), heat-affected zone (HAZ), and base metal (BM). During the friction-welding process, grain refinement occurred, leading to the development of fine equiaxed grains in the DRZ/weld zone. Tensile testing revealed that the weldment exhibited higher strength (YS: 301 ± 6 MPa; UTS: 425 ± 7 MPa) in the BM region compared to the base metal (YS: 207 ± 5 MPa; UTS: 385 ± 9 MPa). However, the weldment demonstrated slightly lower elongation (%El: 13 ± 2) compared to the base metal (%El: 15 ± 3). The decrease in ductility observed in the weldment can be attributed to the presence of distinct weld zones within the welded sample. Also, the tensile graph of the BM showed serrations throughout the curve, which is a characteristic phenomenon known as the Portevin–Le Chatelier effect (serrated yielding) in Al-Mg alloys. This effect occurs due to the influence of dynamic strain aging on the material’s macroscopic plastic deformation. Fractography analysis showcased a wide range of dimple sizes, indicating a ductile fracture mode in the weldment. These findings contribute to understanding the microstructural and mechanical behavior of AA5083 H116 joints subjected to rotary friction welding.https://www.mdpi.com/2073-4352/13/7/1119rotary friction weldingaluminum alloysAA5083 H116microstructural analysismechanical properties |
| spellingShingle | Aditya M. Mahajan K. Vamsi Krishna M. J. Quamar Ateekh Ur Rehman Bharath Bandi N. Kishore Babu Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy Joints Crystals rotary friction welding aluminum alloys AA5083 H116 microstructural analysis mechanical properties |
| title | Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy Joints |
| title_full | Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy Joints |
| title_fullStr | Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy Joints |
| title_full_unstemmed | Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy Joints |
| title_short | Structure–Property Correlation between Friction-Welded Work Hardenable Al-4.9Mg Alloy Joints |
| title_sort | structure property correlation between friction welded work hardenable al 4 9mg alloy joints |
| topic | rotary friction welding aluminum alloys AA5083 H116 microstructural analysis mechanical properties |
| url | https://www.mdpi.com/2073-4352/13/7/1119 |
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