Weldability and mechanical properties of dissimilar aluminum-copper lap joints made by friction stir welding
Weldability and mechanical properties of dissimilar aluminum-copper lap joints made by friction stir welding
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DOI：
10.1016/j.jallcom.2009.10.127
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发表时间：
2010-02-04
影响因子：
6.2
通讯作者：
Sazgari, B.
中科院分区：
文献类型：
--
作者：
Saeid, T.;Abdollah-zadeh, A.;Sazgari, B.
采用搅拌摩擦焊方法制备了1060铝合金与工业纯铜的搭接接头，研究了焊接速度对接头界面形貌、显微组织和接头强度的影响。实验结果表明，在靠近Al/Cu界面的铝中，形成暗区。在该区域检测到Al_4Cu_9和Al_2Cu金属间化合物以及一些微裂纹。随着焊接速度的提高，这种微裂纹的出现频率降低，而在较高的焊接速度（118和190 mm/min）下，由于热输入不足，接头内部会形成空洞缺陷。拉伸剪切试验结果表明，焊接速度为95 mm/min时接头拉伸剪切强度最大，在此焊接速度下，焊缝无空洞缺陷，微裂纹较少。(C)2009爱思唯尔有限公司版权所有。
Lap joints of 1060 aluminum alloy and commercially pure copper was produced by friction stir welding and the effect of welding speed on interface morphology, microstructure, and joint strength was investigated. The experimental results revealed that in the aluminum close to the Al/Cu interface, a dark area was formed. In this area the intermetallic compounds of Al4Cu9 and Al2Cu, and some microcracks were detected. The frequency of such microcracks decreased with increasing welding speed.On the other hand, at higher welding speeds of 118 and 190 mm/min, the cavity defects were formed inside the joints as a result of insufficient heat input. The results of tensile shear test revealed that the maximum tensile shear strength of joint was obtained at welding speed of 95 mm/min. At this welding speed, no cavity defects, and few microcracks were observed in the weld. (C) 2009 Elsevier B.V. All rights reserved.