Version 1
: Received: 24 July 2024 / Approved: 24 July 2024 / Online: 24 July 2024 (13:10:07 CEST)
How to cite:
Lastovich, M.; Kareem, S. A.; Bodunrin, M.; Rock, C.; Gwalani, B. Dual-Phase High Entropy Alloy for High-Temperature Application. Preprints2024, 2024071945. https://doi.org/10.20944/preprints202407.1945.v1
Lastovich, M.; Kareem, S. A.; Bodunrin, M.; Rock, C.; Gwalani, B. Dual-Phase High Entropy Alloy for High-Temperature Application. Preprints 2024, 2024071945. https://doi.org/10.20944/preprints202407.1945.v1
Lastovich, M.; Kareem, S. A.; Bodunrin, M.; Rock, C.; Gwalani, B. Dual-Phase High Entropy Alloy for High-Temperature Application. Preprints2024, 2024071945. https://doi.org/10.20944/preprints202407.1945.v1
APA Style
Lastovich, M., Kareem, S. A., Bodunrin, M., Rock, C., & Gwalani, B. (2024). Dual-Phase High Entropy Alloy for High-Temperature Application. Preprints. https://doi.org/10.20944/preprints202407.1945.v1
Chicago/Turabian Style
Lastovich, M., Christopher Rock and Bharat Gwalani. 2024 "Dual-Phase High Entropy Alloy for High-Temperature Application" Preprints. https://doi.org/10.20944/preprints202407.1945.v1
Abstract
High temperature Ni-superalloys are limited by reliance on critical elements and complex processing steps. High entropy alloys (HEAs) have demonstrated stable single/dual phase microstructures with strong ordering tendencies. A dual phase (FCC+BCC) Al0.5Co0.5CrFeNi1.5Ti0.25 alloy (developed using CALPHAD) was tested for room and high temperature compression behavior. The microstructure mainly comprises of coarse ordered FCC(L12) surrounding decomposed lamellae of ordered FCC(L12) and BCC(L21) phases, which coarsened upon annealing at high temperature (1100 °C) into a bi-continuous structure of disordered FCC+BCC(B2). Additionally, cold rollability of the cast alloy increased from <5% to ~40% after annealing, with a corresponding softening observed in room temperature compression mainly due to disordering of FCC and BCC phases. Peak flow stresses of 793.45MPa, 535.12MPa, and 324.40MPa were achieved at 800oC, 900oC, and 1000oC respectively for the high temperature annealed alloy.
Keywords
high entropy alloys; alloy design; high temperature properties; order-disorder transformations; Gleeble; in situ X-Ray diffraction; DSC; precipitation strengthening; compression; rollability
Subject
Engineering, Metallurgy and Metallurgical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
