Ultrasound enhanced friction stir welding of aluminum and steel:Process and properties of EN AW 6061/DC04-Joints
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第1期
论文作者：Marco Thom? Guntram Wagner Benjamin Stra? Bernd Wolter
文章页码：163 - 172
摘 要：In this work, the joining of aluminum to steel was conducted by ultrasound enhanced friction stir welding（USE-FSW）. The power ultrasound was introduced into one of the metal sheets by an ultrasonic roll seam module synchronously to the FSW-process. The effect of the ultrasound on the resulting welds, their microstructure and their corrosion properties was investigated by light and scanning electron microscopy and corrosion investigations. The USE-FSW-joints showed less and smaller steel particles in the nugget zone as well as a thinner continuous intermetallic phase of FeAl3 at the interface. The nondestructive testing method of computed laminography proved the observations made by optic microscopy due to non-porous joints for both techniques. Corrosion investigations showed only low corrosion current densities and no enhanced galvanic corrosion for the EN AW-6061/DC04-hybrid joints in sodium chloride solution.
Marco Thom?1，Guntram Wagner1，Benjamin Stra?2，Bernd Wolter2
1. Chair of Composites and Material Compounds, Chemnitz University of Technology2. Fraunhofer Institute for Nondestructive Testing IZFP
摘 要：In this work, the joining of aluminum to steel was conducted by ultrasound enhanced friction stir welding（USE-FSW）. The power ultrasound was introduced into one of the metal sheets by an ultrasonic roll seam module synchronously to the FSW-process. The effect of the ultrasound on the resulting welds, their microstructure and their corrosion properties was investigated by light and scanning electron microscopy and corrosion investigations. The USE-FSW-joints showed less and smaller steel particles in the nugget zone as well as a thinner continuous intermetallic phase of FeAl3 at the interface. The nondestructive testing method of computed laminography proved the observations made by optic microscopy due to non-porous joints for both techniques. Corrosion investigations showed only low corrosion current densities and no enhanced galvanic corrosion for the EN AW-6061/DC04-hybrid joints in sodium chloride solution.
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