Microstructural and Mechanical Properties Analysis of Fibre Laser Welding of Dissimilar AA6061 and AA2024 Aluminium Alloy

Arya, Pradyumn Kumar; Kumar, Vivek; Sathiaraj, Dan; Palani, I. A.; Jain, Neelesh Kumar

doi:10.1007/978-981-16-7787-8_55

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…They associated the softening behavior of alloy with increasing aging time and temperature. Since then, numerous studies have been done experimentally and numerically, to investigate the mechanical behavior and softening effects of weld joints in TIG [9][10][11][12][13][14][15][16] and laser welding [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Comparison Studies on Mechanical Properties, Microstructural Changes and Heat-Affected-Zone (HAZ) of Tig- And Laser Welded en AW 6082-T6

Fauzi,

Mokhtar

2024

Preprint

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During fusion welding of aluminium alloy, the heat-affected zone (HAZ) reduces mechanical strength of component, particularly in 6000 series alloys, where the reduction can be 30%-50%. This softening phenomenon is not adequately addressed in current design standards such as Eurocode 9 and the British Standard Institution (BSI) Standard. In the present study, comprehensive experimental work is conducted to investigate the influence of welding methods and parameters on the occurrence of HAZ. Through experimental analysis of tungsten inert gas (TIG) and laser welding coupons, the severity and extension of HAZ were compared using tensile strength, hardness values and microstructure distribution. From this study, it is evident that tensile strength and hardness values of welded components significantly depended on heat input, welding speed, and welding method. The strength reduction in laser-welded components was inconsistent with that of TIG-welded components. However, the extent of HAZ was much narrower in laser-welded components than in TIG welding. In terms of microstructural analysis, the grain size was significantly increased after the welding processes. The orientation of the grain was found to be different for each welding method and was greatly influenced by the welding speed and temperature gradient of the weld pool. From this work, a comparison of mechanical properties and microstructural changes in TIG and laser-welded components can provide a basis to further improve the current design standards, particularly on the softening factor of welded joining. The results will significantly contribute to the enhancement of welding quality in the industrial joining practice.

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Section: Introductionmentioning

confidence: 99%

Comparison Studies on Mechanical Properties, Microstructural Changes and Heat-Affected-Zone (HAZ) of Tig- And Laser Welded en AW 6082-T6

Fauzi,

Mokhtar

2024

Preprint

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“…The advancing side and retreating side play a significant role in FSW among specific alloys [10]. There remains a considerable difference in heat affected zone (HAZ) and thermo-mechanical affected zone (TMAZ) between the advancing and retreating sides [11]. Surface becomes irregular when Al sheet is fixed on advancing side whereas if Mg sheet is fixed on advancing side, the mixing is much more homogeneous [12].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical and corrosion properties of differently cooled friction stir welded joints of Al and Mg alloys

Arya¹,

Jain²,

Jayaprakash³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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Current analysis emphasizes on microstructural, mechanical, and corrosion behaviour of friction stir welding (FSW) joints of AA6061-T6 Al alloy and AZ31B Mg alloy using various cooling mechanisms i.e., air cooling, forced water cooling, and underwater cooling. The air-cooled, forced-water cooled, and underwater cooled FSW are abbreviated as Air-FSW, FCFSW, and UWFSW respectively. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDS) analysis established the formation of intermetallic compounds (IMCs) layers of varying thickness with composition of Al12Mg17 and Al3Mg2 at the bonding interaction of the joints. The surface appearance of Air-FSW joints was observed rougher and darker due to generation of more heat while the appearance of surface of UWFSW joints was smoother and brighter because the generated frictional heat was taken away by the water. Due to reduction of the heat and so the temperature in FCFSW and UWFSW joints, the development of IMCs got reduced, resulting in improved weld strength and joint efficiency. Occurrence of weld crack in the weld stir region was reduced in FCFSW joint as compared to Air-FSW joint. Whereas, very few or no cracks were observed in weld stir region of UWFSW joints. Maximum joint's strength of Air-FSW joints was observed 120.74 MPa, which increased to 151.56 MPa and 182.7 MPa with FCFSW and UWFSW respectively. Air-FSW joint exhibited a brittle fracture mode but in water medium, their fracture path was shifted to ductile mode which demonstrated the formation of enhanced ductility of the UWFSW joints. The corrosion resistance got improved when the joints were prepared in underwater medium.

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Effect of Welding Speed on Phase Transformation and Mechanical Properties of Laser-Welded NiTi Shape Memory Alloy

Kumar

Palani

Madhukar

2022

Lecture Notes in Mechanical Engineering

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Microstructural and Mechanical Properties Analysis of Fibre Laser Welding of Dissimilar AA6061 and AA2024 Aluminium Alloy

Cited by 5 publications

References 14 publications

Comparison Studies on Mechanical Properties, Microstructural Changes and Heat-Affected-Zone (HAZ) of Tig- And Laser Welded en AW 6082-T6

Comparison Studies on Mechanical Properties, Microstructural Changes and Heat-Affected-Zone (HAZ) of Tig- And Laser Welded en AW 6082-T6

Microstructure, mechanical and corrosion properties of differently cooled friction stir welded joints of Al and Mg alloys

Effect of Welding Speed on Phase Transformation and Mechanical Properties of Laser-Welded NiTi Shape Memory Alloy

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