Mechanical and Corrosion Properties of Friction Stir Welded and Tungsten Inert Gas Welded Phosphor Bronze

IF 1.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Advances in Materials Science Pub Date : 2023-12-01 DOI:10.2478/adms-2023-0024

S. Gopi, D. Mohan, E. Natarajan

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Abstract

Abstract This study investigated the mechanical and corrosion properties of Friction Stir Welded (FSW) and Tungsten Inert Gas (TIG) welded phosphor bronze (CuSn4) joints. Corrosion tests were conducted on the welded joints, and the percentage of weight loss due to corrosion was measured at different time intervals. Results revealed that the percentage of weight loss due to corrosion of the TIG joint increased with time, whereas the percentage of weight loss due to corrosion of the FSW welded joint remained constant. This could be attributed to recrystallisation that happened in the solid-state welding, which reduced corrosion in the FSW welded joint. In addition, tensile tests were conducted to evaluate the strength of the joints. FSW with a spindle speed of 1300 rpm, weld speed of 0.06mm/sec, plunge depth of 0.25mm, pin profile of pentagon, and flat shoulder profile was found to produce good results. TIG welding with a welding speed of 1.75mm/sec, a gas flow rate of 7.5 cm3/min and an amperage of 120A also produced good results. The tensile strength of FSW was found to be approximately 1.6 times higher than that of TIG welding.

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摩擦搅拌焊接和钨极惰性气体焊接磷青铜的机械和腐蚀特性

摘要本研究调查了摩擦搅拌焊（FSW）和钨极惰性气体（TIG）焊接磷青铜（CuSn4）接头的机械性能和腐蚀性能。对焊点进行了腐蚀试验，并在不同时间间隔测量了腐蚀导致的重量损失百分比。结果显示，氩弧焊接点的腐蚀失重百分比随着时间的推移而增加，而焊接点的腐蚀失重百分比则保持不变。这可能是由于在固态焊接过程中发生了再结晶，从而减少了 FSW 焊点的腐蚀。此外，还进行了拉伸试验以评估焊点的强度。在主轴转速为 1300 转/分、焊接速度为 0.06 毫米/秒、切入深度为 0.25 毫米、销轴轮廓为五边形、肩部轮廓为平面的情况下，FSW 焊接效果良好。焊接速度为 1.75 毫米/秒、气体流量为 7.5 立方厘米/分钟、安培数为 120 安培的氩弧焊也取得了良好的效果。结果发现，FSW 焊接的抗拉强度比 TIG 焊接高出约 1.6 倍。

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Advances in Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-

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