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Interlaboratory mechanical property study for Cobalt-Chromium alloy Made by Laser Powder-Bed-Fusion Additive Manufacturing

Published

Author(s)

John A. Slotwinski, William E. Luecke, Eric Lass, Antonio M. Possolo

Abstract

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.
Citation
Technical Note (NIST TN) - 2006
Report Number
2006

Keywords

additive manufacturing, tensile testing, interlaboratory

Citation

Slotwinski, J. , Luecke, W. , Lass, E. and Possolo, A. (2018), 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)
Created September 19, 2018, Updated November 10, 2018