Abstract
The deposition time for fabricating the thin-wall part as well as the peak temperature of the substrate during the process was analyzed in the double electrode gas metal arc welding (DE-GMAW) based additive manufacturing (AM). The total deposition time and the interlayer idle time of the manufacturing process decreased with the increasing of the bypass current under the same interlayer temperature and the same deposition rate. The thermal cycling curves illustrated that the peak temperature of the substrate was lower in the DE-GMAW base AM under the same conditions. When depositing the thin-wall parts, the DE-GMAW based AM can reduce the heat input to the substrate and improve the fabrication efficiency, compared with the GMAW based AM.
Highlights
Additive manufacturing (AM) is an advanced fabrication technique that can make parts through a layer by layer deposition based on the virtual solid models
The metal wire was employed as the deposited raw materials in mostly welding arc based AM, it was a cleaner technique with fewer contamination issues, compared with the process using powder [4]
Based on the different welding processes using in AM, it can be classified into following categories: gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), and plasma arc welding (PAW)
Summary
Additive manufacturing (AM) is an advanced fabrication technique that can make parts through a layer by layer deposition based on the virtual solid models. According to the heat source utilized in the deposition process, metallic components AM technologies can be divided into following three categories mainly: laser, electron beam and welding arc. The metal wire was employed as the deposited raw materials in mostly welding arc based AM, it was a cleaner technique with fewer contamination issues, compared with the process using powder [4]. Based on the different welding processes using in AM, it can be classified into following categories: gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), and plasma arc welding (PAW). In GMAW based AM, the welding arc was directly struck between the wire and the substrate. GMAW based AM is more suitable for fabricating the medium and large scale structure metal parts [5]
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