Interlaboratory mechanical property study for Cobalt-Chromium alloy Made by Laser Powder-Bed-Fusion Additive Manufacturing
John A. Slotwinski, William E. Luecke, Eric Lass, Antonio M. Possolo
An eight-laboratory study of the mechanical properties of provided the data to evaluate variability in tensile mechanical properties of cobalt-chrome alloy (UNS R31538) made by metal additive manufacturing. Six laboratories employed laser powder-bed-fusion additive manufacturing, and two additional laboratories employed electronbeam powderbed fusion. For the five laboratories that employed nominally identical laser powder-bed fusion systems, the between-laboratory variability in yield strength and tensile strength was several times larger than the within-laboratory variability. Microstructural analysis using scanning electron microscopy revealed that each laboratory produced slightly different microstructures. Thermodynamic modeling of the solidification and subsequent post-build annealing demonstrated that the final microstructure is sensitive to the exact heat-treating conditions.
, Luecke, W.
, Lass, E.
and Possolo, A.
Interlaboratory mechanical property study for Cobalt-Chromium alloy Made by Laser Powder-Bed-Fusion Additive Manufacturing, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.2006
(Accessed July 31, 2021)