NASA EBF3 - Electron Beam Free Form Fabrication

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The alloy composition of 2219/2319 Al is basically 6 wt% Cu with the balance Al. This is a common aerospace alloy used extensively on the Space Shuttle and Space Station, and is readily weldable. On the left, the microstructures show that a variety of microstructural features can be produced depending on the process parameters. The top microstructure shows that as-deposited structures can be equiaxed, similar to wrought products. The bottom microstructure shows some solidification structure (dendrites) – when heat treated, this solidification microstructure is transformed into a microstructure more typical to that shown in the top photograph. The tensile yield strength of EBF3 deposited material falls between O temper (annealed) and T4 (solutionized and quenched), based upon typical handbook values for wrought product forms like plate and sheet. After being exposed to a solutionization and artificial aging heat treatment (T6), the EBF3 material demonstrates properties equivalent to similarly heat treated wrought products.

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NASA EBF3 - Electron Beam Free Form Fabrication - Presentation Transcript

EBF 3 Electron Beam Free Form Fabrication from NASA
EBF 3 Build & repair anywhere
EBF 3 Simple beginnings
EBF 3 Structural properties
2219 Al Tensile properties after T62 heat treatment (comparable to handbook for T62 sheet/plate) 75.0 50.0 Tensile Strength, 25.0 1 Elongation, 0 0 Yield Ultimate Elongation EBF3 + T62 Deposition parameters yield equiaxed or dendritic grain structure forms T62 typical Karen.M.Taminger@nasa.gov / John.A.Wagner@nasa.gov
Ti-6Al-4V EBF3 Ti-6-4 equivalent to annealed wrought product 150 15 Elongation, % Strength, ksi 100 10 50 5 0 0 Yield Ultimate Elongation As-deposited Annealed (Wrought) Karen.M.Taminger@nasa.gov / John.A.Wagner@nasa.gov
EBF 3 Minimal machining
EBF 3 Complex geometries
EBF 3 Unusual geometries
EBF 3 Difﬁcult geometries
EBF 3 Structural components
EBF 3 Low power, transportable
EBF 3 Less power, portable
EBF 3 Components
EBF 3 Control, feedback, freedom
EBF 3 Microgravity
EBF 3 Learn more
http://www.fuentek.com/technologies/EBF3.htm
EBF 3 Electron Beam Free Form Fabrication from NASA