Process stability and forming accuracy on wire arc additive manufactured Al–Zn–Mg–Cu alloy with different electrode positive/electrode negative ratios of CMT advance process
Yuwen Wang, Ji Chen, Maoai Chen, H. Su, Wenbin Zhang, Chuansong Wu
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引用次数: 2
Abstract
The influence of electrode positive/electrode negative (EP/EN) ratio on cold metal transfer advance-based wire arc additive manufacturing (WAAM) process for Al–Zn–Mg–Cu alloy was studied in this paper. The process stability was investigated via analysing electrical waveforms and arc/metal transfer images concurrently. A high EP/EN ratio (≥ 13:7) was beneficial to decrease abnormal long wait phase duration of current and spatter of droplet, which improved the stability of WAAM process. The forming accuracies of the samples increased first and then decreased with the increase of EP/EN ratio due to the incompatibility of the heat input and molten pool flow. The average width and effective width coefficient showed a positive correlation with EP/EN ratio.
期刊介绍：
Science and Technology of Welding and Joining is an international peer-reviewed journal covering both the basic science and applied technology of welding and joining.
Its comprehensive scope encompasses all welding and joining techniques (brazing, soldering, mechanical joining, etc.) and aspects such as characterisation of heat sources, mathematical modelling of transport phenomena, weld pool solidification, phase transformations in weldments, microstructure-property relationships, welding processes, weld sensing, control and automation, neural network applications, and joining of advanced materials, including plastics and composites.
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