Fig. 2 Examples of electron beam melting and casting processes. (a) Button melting with controlled solidification for quantitative determination of low-density inclusions. (b) Consolidation of raw material, chips, and solid scrap to consumable electrodes for vacuum arc or electron beam More

Fig. 6 Particle shape of niobium powder made by electron beam melting, hydriding, crushing, and degassing. 250× More

Fig. 7 Particle shape of tantalum powder produced by electron beam melting, hydriding, crushing, and degassing. Courtesy of Prabhat Kumar More

Fig. 1 Schematic of the electron beam melting process More

Fig. 35 Electron beam melting additive-manufactured copper cathode. (a) Design figure. (b) As-fabricated. (c) Final polished. (d) Assembly figures. (e) Installed in the Pegasus photoinjector. Source: Ref 40 More

Fig. 2 Configuration of an electron beam melting system. Adapted from Ref 45 More

Fig. 110 Rotating-beam fatigue strength of wrought electron-beam-melted tantalum. Sample impurities: <44 ppm C + N 2 More

Fig. 4 Scanning electron micrographs of electron-beam-melted alloy 718 processed at (a) lower temperature (915 °C, or 1680 °F) and (b) higher temperature (990 °C, or 1815 °F). (c) Time-temperature-transformation diagram of alloy 718 showing that between 900 and 1000 °C (1650 and 1830 °F More

Fig. 32 Microstructures of silver-copper alloys electron beam melted and resolidified at different velocities. (a) Ag-15Cu alloy resolidified at 0.025 m/s (1 in./s). Globular microsegregation pattern. Magnification: 32,000×. (b) Ag-15Cu alloy resolidified at 0.3 m/s (12 in./s). Cellular More

Fig. 106 Low-temperature tensile properties of electron-beam-melted tantalum bar. Sample impurities: <0.003% C, <0.003% O 2 , 0.0008% N 2 , <0.08% other. Bar was annealed for 3 h at 1200 °C: hardness, 83 HV; grain size, ASTM No. 5. Crosshead speed: unnotched specimens, 0.5 mm/min More