Abstract
The influence of Ni addition to the phase transformation in the Co–17Re–23Cr high-temperature alloy was studied using neutron diffraction techniques. Three different alloys with 8, 15 and 25% of Ni were analyzed. The Ni effect on stabilization of cubic phase of Co matrix was confirmed, and the influence on σ-phase was reported. Formation of the secondary cubic phase with the smaller cell during heating and cooling associated with the creation of Re-rich σ-phase was observed. The summary phase diagrams for heating and cooling are created to depict the overall Ni influence on Co–17Re–23Cr alloy.
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ACKNOWLEDGMENTS
The authors thank the Heinz Maier-Leibnitz Zentrum in Garching, Germany, for providing beamtime.
Funding
This work was supported by the German Research Foundation (DFG) (grant no. GI 242/4-1|RO 2045/32-1) at TU Muenchen/TU Braunschweig, and by The Czech Science Foundation (grant no. 14-36566G).
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Beran, P., Mukherji, D., Strunz, P. et al. In Situ Neutron Diffraction Study of Ni Addition in Co–Re–Cr High-Temperature Alloys and Influence on Phase Transformations. J. Surf. Investig. 14 (Suppl 1), S179–S184 (2020). https://doi.org/10.1134/S1027451020070071
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DOI: https://doi.org/10.1134/S1027451020070071