A general strategy for the reliable joining of Al/Ti dissimilar alloys via ultrasonic assisted friction stir welding
A general strategy for the reliable joining of Al/Ti dissimilar alloys via ultrasonic assisted friction stir welding
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DOI：
10.1016/j.jmst.2018.09.022
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发表时间：
2019-01-01
影响因子：
10.9
通讯作者：
Li, Qinghua
中科院分区：
文献类型：
--
作者：
Ma, Zhongwei;Jin, Yanye;Li, Qinghua
采用超声辅助搅拌摩擦焊（UaFSW）连接6061-T6铝合金和Ti6Al4V合金。采用小的插入深度和低的热输入，获得了无明显减厚的良好接头。在接头界面处观察到无金属间化合物层的扩散型键合。超声波提高了扩散厚度，减小了晶粒和钛合金破片的平均尺寸。在UaFSW接头底部界面处形成钩状结构，提高了连接长度和机械联锁性能。超声进一步细化晶粒，提高了搅拌区的显微硬度。UaFSW接头的最大抗拉强度为236 MPa，达到6061-T6合金基体的85%。(C) 2018年由爱思唯尔有限公司代表《材料科学与技术杂志》编辑部出版。
Ultrasonic assisted friction stir welding (UaFSW) was used to join 6061-T6 aluminum and Ti6Al4V alloys. A small plunge depth endowed with the low heat input was used and the sound joints without obvious thickness reduction were achieved. A diffusion-type bonding without the intermetallic compounds layer was observed at the joint interface. The ultrasonic improved the diffusion thickness and decreased the average size of grains and titanium alloy fragments. A hook-like structure was formed at the bottom interface of the UaFSW joint, which improved the bonding length and the mechanical interlocking. The microhardness of the stir zone was increased because of the further grain refinement induced by ultrasonic. The maximum tensile strength of the UaFSW joint was 236 MPa, which reached 85% of the base 6061-T6 alloy. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.