A thin-walled product made of AZ31 magnesium alloy was successfully fabricated using wire-feed electron-beam additive manufacturing. The microstructure of the initial wire, used as a precursor, comprises a α-Mg(Al, Zn) solid solution and a minor amount of the Al₈Mn₅ intermetallic phase. The microstructure of the as-printed AZ31 alloy exhibits a three-phase structure: α-Mg(Al, Zn), Al₈Mn₅, and β-Mg₁₇Al₁₂. It was proposed that the secondary β-phase was formed via a primary solidification process upon the cooling of the welded layers. The texture effect was evident in the direction, corresponding to the printing direction, while other crystallographic orientations demonstrated near-equal pole densities as the XRD lines. The yield strength for the as-printed alloy was found to be 86 MPa; the tensile strength reached 240 MPa; and the relative elongation was 21.5%. For the first time, the corrosion resistance of an EBAM-fabricated AZ31 alloy was studied. It was revealed that the corrosion current density in the referenced as-cast and as-printed alloys was below 2·10⁻⁴ A/cm².

This article presents a spectral thermography method for monitoring the spatial temperature distribution in the molten bath during additive manufacturing of metal parts, along with the experimental setup designed to implement this method. The approach is based on multispectral imaging across four narrow-band spectral channels using a single image sensor. The method was experimentally tested on an electron beam additive manufacturing system. The raw experimental data exhibited characteristic distortions caused by partial material deposition on the protective camera window. A dedicated preprocessing algorithm was developed to compensate for these distortions. Experimental results from electron beam additive manufacturing system demonstrate the feasibility of detecting relative temperature changes during the additive synthesis process. At the selected frame capture rate, periodic temperature fluctuations are observable in the spatial temperature maps, correlating with the specific cladding mode parameters. The overall pattern of the spatial temperature distribution in the mol - ten bath shows a high degree of consistency with theoretical predictions reported in earlier publications. These findings confirm the potential for further application of the proposed approach in temperature regime monitoring during additive manufacturing processes.