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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Effect of friction stir lap weld and post weld heat treatment on corrosion behavior of dissimilar aluminum alloys
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Effect of friction stir lap weld and post weld heat treatment on corrosion behavior of dissimilar aluminum alloys

机译：摩擦搅拌液焊接的影响和焊接热处理对不同铝合金腐蚀行为的影响

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摘要

This study has been undertaken to evaluate the electrochemical behavior of friction stir lap welded V-95CHT1 and D19CHT plates and to study the effect of post weld heat treatment on the corrosion characteristics of the welded alloys. The corrosion characteristics were tested as per ASTM G-34 standard by immersion in EXCO solution and analyzing the corroded plates through optical imaging and scanning electron microscopic analysis. Cyclic polarization tests were also undertaken to validate the results of the immersion test. It was observed that friction stir lap weld had sensitized the V-95 plate with the heat-affected zone of the joint found most susceptible and weld nugget least susceptible to corrosion. Corrosion resistance of the welded plates was also found to be higher for those joints that were welded employing process parameters providing higher weld heat input. Post weld retrogression and re-aging heat treatment was also found to be beneficial in increasing the corrosion resistance of the alloy.
机译：本研究已经开展，以评估摩擦搅拌圈焊接V-95CHT1和D19CHT板的电化学行为，并研究后焊接热处理对焊接合金腐蚀特性的影响。通过浸入Exco溶液中的每种ASTM G-34标准测试腐蚀特性，并通过光学成像和扫描电子显微镜分析分析腐蚀板。还进行了循环偏振试验以验证浸渍试验的结果。观察到摩擦搅拌圈焊接致敏V-95板与接头的热影响区域，发现最易感和焊缝最不易受腐蚀。对于那些采用工艺参数的接头，也发现焊接板的耐腐蚀性更高，该接头采用提供更高的焊接热输入的工艺参数。焊接后倒置和再老化热处理也有利于增加合金的耐腐蚀性。

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