首页> 外文期刊>Journal of Materials Engineering and Performance >Pulse MIG Welding of 6061-T6/A356-T6 Aluminum Alloy Dissimilar T-joint
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Pulse MIG Welding of 6061-T6/A356-T6 Aluminum Alloy Dissimilar T-joint

机译:脉冲MIG焊接6061-T6 / A356-T6铝合金不同T关节

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摘要

Dissimilar T-joints between 4-mm-thick wrought 6061-T6 and cast A356-T6 aluminum alloy plates are made with pulse metal inert gas welding (P-MIG) process, and the weld geometry, microstructure and mechanical properties of the joints are investigated. The average tensile load of the joints is 9488?N at travel speed 12?mm/s and welding current 165 A with 6061 aluminum alloy as web plate and A356 aluminum alloy as flange plate. The weld zone (WZ) is composed of dendrite zone and columnar zone, which is wide at bottom of weld making it become a weak zone. Besides, grain boundary (GB) liquation, consisting of GB eutectic and solute-depleted α-Al, occurs in the partially melted zone on 6061 aluminum alloy side. The T-joint with highest tensile load fails at the root of WZ and the flange plate near the weld with different fracture modes.
机译:用脉冲金属惰性气体焊接(P-MIG)工艺制造4毫米厚的锻造6061-T6和铸造A356-T6铝合金板之间的不同T关节,以及关节的焊接几何形状,微观结构和机械性能 调查。 接头的平均拉伸载荷在行进速度12?Mm / s和焊接电流165a,与6061铝合金为腹板和A356铝合金作为法兰板。 焊接区(WZ)由树突区和柱状区组成,焊缝底部宽度,使其成为薄弱区域。 此外,由GB共晶和溶质溶解的α-A1组成的晶界(GB)液相,在6061铝合金侧的部分熔化区中发生。 具有最高拉伸载荷的T关节在WZ的根部和焊缝附近的法兰板具有不同的裂缝模式。

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