High-temperature ESL-EDXRD studies on the compositional and structural evolution of complex 3d transition metal alloys
Document Type
Article
Publication Date
4-25-2025
Abstract
Questions about temperature-dependent structural and compositional stability persist as new alloys are developed for additive manufacturing (AM) applications. The accuracy of phase diagram predictions using CALPHAD was evaluated with energy-dispersive X-ray diffraction (ED-XRD) on electrostatically levitated samples at high temperatures, concurrently measuring composition through X-ray fluorescence (XRF) emissions. A set of AM-relevant alloys comprising 3d transition metals was tested, including NiCu, Ni51Cu44Cr5, Ni38Co33Cu29, Ni29Co33Cu38, Ni38Co33Cr29 and CoCrFeNi. While it was found that experimental results partially aligned with CALPHAD predictions for many binary and ternary alloys, they proved inaccurate for more complex alloys, such as the CoCrFeNi quaternary. Additionally, XRF measurements indicated that among the tested alloys, those containing Cu became Cu deficient in the near-surface at high temperatures, raising questions about the viability of these alloys for specific AM processes.
Publication Source (Journal or Book title)
Journal of Alloys and Compounds
Recommended Citation
McKay, F., Bergeron, K., Britt, S., Simon, B., Phillips, B., Young, D., Raush, J., & Sprunger, P. (2025). High-temperature ESL-EDXRD studies on the compositional and structural evolution of complex 3d transition metal alloys. Journal of Alloys and Compounds, 1025 https://doi.org/10.1016/j.jallcom.2025.180319