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Effect of Prior Deformation In Post Weld Heat Treatment of Aluminium Alloy 2219 Gas Tungsten Arc Welds

    Vijayalakshmi Manugula

International Research Journal on Advanced Science Hub, 2021, Volume 3, Issue Special Issue 7S, Pages 25-29
10.47392/irjash.2021.205

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Abstract

In this paper the effect of arc oscillation and pulsed current of gas tungsten arc welding (GTAW)on the microstructure and mechanical properties of aluminium alloy 2219 was studied. Microstructural characterisation of the weld region was carried out using optical micros copy and Electron probe micro analysis (EPMA). Hardness measurements were carried out using Vickers hardness tester to evaluate the hardness in the base metal and weld zone. The microstructures of Arc oscillation and pulsed current (AOPC) welds and continuous current (CC) welds were compared and their hardness were correlated. It was observed that arc oscillation and pulsed current weld resulted in fine equiaxed grain structure whereas continuous current welds resulted in columnar structure. The significant improvement in mechanical properties of arc oscillation and pulsed current welds may be attributed to the discrete copper segregation. Post weld deformation has improved the mechanical properties of arc oscillation and pulsed current welds significantly. Aging can be carried out at lower temperature with prior deformation to improve the mechanical properties of the weld
Keywords:
    GTA welds Arc Oscillation Pulsed current Continuous Current EPMA AA2219
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(2021). Effect of Prior Deformation In Post Weld Heat Treatment of Aluminium Alloy 2219 Gas Tungsten Arc Welds. International Research Journal on Advanced Science Hub, 3(Special Issue 7S), 25-29. doi: 10.47392/irjash.2021.205
Vijayalakshmi Manugula. "Effect of Prior Deformation In Post Weld Heat Treatment of Aluminium Alloy 2219 Gas Tungsten Arc Welds". International Research Journal on Advanced Science Hub, 3, Special Issue 7S, 2021, 25-29. doi: 10.47392/irjash.2021.205
(2021). 'Effect of Prior Deformation In Post Weld Heat Treatment of Aluminium Alloy 2219 Gas Tungsten Arc Welds', International Research Journal on Advanced Science Hub, 3(Special Issue 7S), pp. 25-29. doi: 10.47392/irjash.2021.205
Effect of Prior Deformation In Post Weld Heat Treatment of Aluminium Alloy 2219 Gas Tungsten Arc Welds. International Research Journal on Advanced Science Hub, 2021; 3(Special Issue 7S): 25-29. doi: 10.47392/irjash.2021.205
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