## 2 Materials and Methods  
### Base Metal and Filler Wires  
The base metal used in this study was AA5083-H112, with a thickness of 25 mm; the chemical composition is shown in Table 1. This study designated the filler wires as W1, W2, and W3, according to the magnesium and manganese contents. Table 2 shows the chemical composition of the aluminum 5183 alloy wire and the wires, W1, W2, and W3, used in the experiment. The diameters of the four wires are all the same at 4.8 mm. The reason for selecting the contents of magnesium and manganese, as shown in Table 2, is that the solid solubility and drawing characteristics of the aluminum alloy were taken into consideration when manufacturing the aluminum alloy wire. Magnesium and manganese improve the mechanical properties due to solid solution strengthening, but, if the content is excessive, defects occur when drawing the wire. The aluminum alloy wires used in the experiment were created in several steps. First, aluminum alloy billets were continuously cast using continuous casting equipment. Then, an extruded metal with a diameter of 9.5 mm was produced through a multi-filament wire extrusion process. Lastly, an aluminum alloy wire with a diameter of 4.8 mm was produced by drawing using an extruded metal.  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Base MetalElement** & **Si** & **Fe** & **Cu** & **Mn** & **Mg** & **Cr** & **Ti** & **Al** \\ \hline AA5083 & 0.13 & 0.27 & 0.04 & 0.66 & 4.40 & 0.05 & 0.02 & Bal. \\ \hline \hline \end{tabular}
\end{table}
Table 1: Chemical composition of base metal (wt.%).  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Base MetalElement** & **Si** & **Fe** & **Cu** & **Mn** & **Mg** & **Cr** & **Ti** & **Be** & **Ca** & **Al** \\ \hline W1 & 0.03 & 0.09 & 0.003 & 0.003 & 7.33 & 0 & 0.03 & 0 & 0.07 & Bal. \\ \hline W2 & 0.02 & 0.07 & 0.002 & 0.004 & 6.38 & 0.001 & 0.03 & 0 & 0.06 & Bal. \\ \hline W3 & 0.08 & 0.04 & 0.002 & 0.46 & 6.56 & 0.01 & 0.03 & 0 & 0.05 & Bal. \\ \hline AA5183 & 0.07 & 0.17 & 0 & 0.66 & 5.10 & 0.07 & 0.07 & 0 & 0 & Bal. \\ \hline \hline \end{tabular}
\end{table}
Table 2: Chemical composition of filler wires (wt.%).  
In this study, the effects of the addition of magnesium and manganese on the aluminum filler wire were analyzed, respectively. First, the mechanical properties were analyzed, according to the difference in magnesium content, by comparing the weld using W1 with the highest magnesium content and the weld using W2 with a relatively low magnesium content. Whether the residual amount of magnesium and the strength of the weld were different after vaporization occurred during welding was analyzed depending on whether the magnesium content of the filler wire was different. Next, the mechanical properties were compared according to the difference in manganese content by comparing the weld using W2 and the weld using W3. Whether the strength of the weld was different due to solid solution strengthening was analyzed depending on whether manganese was added to the filler wire or not. Lastly, welding was performed using a commercial aluminum 5183 alloy wire, and the strengths were compared amongst all welds.