Effect of weld thermal cycle on metallurgical and corrosion behavior of friction stir weld joint of AA2014 aluminium alloy
Effect of weld thermal cycle on metallurgical and corrosion behavior of friction stir weld joint of AA2014 aluminium alloy
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DOI：
10.1016/j.jmapro.2018.12.001
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发表时间：
2019-01-01
影响因子：
6.2
通讯作者：
Dwivedi, Dheerendra Kumar
中科院分区：
文献类型：
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作者：
Sinhmar, Sunil;Dwivedi, Dheerendra Kumar
在7种不同速度组合下对AA2014铝合金进行了搅拌摩擦焊试验。在所有的速度参数下测量焊接热循环，并在较高的工具旋转速度和较低的焊接速度下观察到相应的峰值温度。通过硬度和拉伸试验研究了焊接接头的力学性能。采用浸泡、塔菲尔和电化学阻抗谱测试研究了腐蚀行为。采用光学显微镜、场发射扫描电镜、X射线衍射仪和透射电子显微镜对焊接接头的冶金行为进行了研究。在低转速和高横移速度下，显微硬度和耐蚀性较高。从微观结构的角度讨论了腐蚀行为。
Friction stir welding of AA2014 aluminium alloy was performed at seven different speed combinations. Weld thermal cycles were measured at all the speed parameters and corresponding peak temperatures were observed at higher tool rotation speed and lower welding speed. Hardness and tensile tests were performed to study the mechanical properties of the weld joints. Corrosion behavior was studied using immersion, Tafel and electrochemical impedance spectroscopy tests. Optical microscopy, FESEM, XRD and transmission electron microscopy were used to investigate the metallurgical behavior of the weld joints. Microhardness and corrosion resistance were found higher at low rotation speed and high traverse speed. Corrosion behavior has been discussed in light of microstructure.