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

Published

September 19, 2018

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

NIST Pub Series

Technical Note (NIST TN)

Pub Type

NIST Pubs

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DOI Link

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 November 21, 2024)