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In this study we conducted single V-groove butt welding (GTAW) on three types of heat treatable aluminum alloys2024-T351, 6061-T6 and 7075-T6 and compared the angular distortion levels of the three aluminum alloys at differentVee preparation angles with or without restraint. Experimental results demonstrated that when the Vee preparationangle was 0° (I-shaped groove), the angular distortion level of the restrained weldment can exceed that of theunrestrained weldments. Moreover, when the Vee preparation angle was 45°, 60° or 90°, the restrained weldmenthad lower angular distortion than the unrestrained weldments. The single Vee preparation angle (amount of fillermetal) in butt welding affected the angular distortion of the weldment. Without restraint, the angular distortiontended to increase with the single Vee preparation angle. Meanwhile, the angular distortion tended to decrease whenthe single Vee preparation angle was 60°. Additionally, a restrained weldment had high angular distortion when thesingle Vee preparation angle was 0°. Notably, the angular distortion tended to reduce with increasing single Veepreparation angle. The angular distortion of the weldment was minimized at an angle of 60°. However, the angulardistortion increased when the Vee preparation angle exceeded 60°. The high-temperature yield strength of a materialalso affected its angular distortion. Angular distortion increased with high-temperature yield strength. Experimentalresults also showed that, from the strongest to the weakest, the high-temperature yield strength of the three typesof aluminum alloys followed the order 6061-T6 and 2024-T351>7075-T6.
In this study we conducted single V-groove butt welding (GTAW) on three types of heat treatable aluminum alloys 2024-T351, 6061-T6 and 7075-T6 and compared the angular distortion levels of the three aluminum alloys at different Veee preparation angles with or without restraint. Experimental results of that when the Vee preparationangle was 0 ° (I-shaped groove), the angular distortion level of the restrained weldment can exceed that of the restored weldments. Moreover, when the Vee preparation angle was 45 °, 60 ° or 90 °, the restrained weldmenthad lower angular distortion than the unrestrained weldments. The single Vee preparation angle (amount of fillermetal) in butt welding affected the angular distortion of the weldment. Without restraint, the angular distortion of to increase with the single Vee preparation angle , the angular distortion tended to decrease whenthe single Vee preparation angle was 60 °., additionally, a restrained weldment had high angular di The angular distortion of the weldment was minimized at an angle of 60 °. However, the angular distortion of increased when the Vee preparation angle was 0 °. 60 °. The high-temperature yield strength of a materialalso affected its angular distortion. Experimental results also showed that from the strongest to the weakest, the high-temperature yield strength of the three types of aluminum alloys followed the order 6061-T6 and 2024-T351> 7075-T6.