Structure / Property (Constitutive and Dynamic Strength / Damage) Characterization of Additively Manufactured (AM) Tantalum

Certification requirements generally involve meeting engineering and physics requirements tied to the functional requirements of the engineering component and finally process and product qualification. In this presentation, the results of a study quantifying the constitutive behavior of Tantalum (Ta) fabricated using an EOS laser-powder-bed machine is presented. The microstructure of the AM-Ta is detailed and compared / contrast to wrought Ta. The mechanical behavior of the AM build methods was characterized using compression testing as a function of strain rate. The dynamic damage evolution and failure response of the AM-Ta material, as well as wrought Ta, was probed using flyer-plate impact driven spallation experiments. The damage evolution of the AM and wrought Ta were characterized using optical metallography and electron-back-scatter diffraction (EBSD).