1. Investigation on the thermal expansion behavior of FeCoNi and Fe30Co30Ni30Cr10-xMnx high entropy alloys
- Author
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Lu Gan, An-Chou Yeh, Shih Ming Kuo, Jhuo Lun Lee, Hideyuki Murakami, Stéphane Gorsse, Seiji Mitani, Ming Yen Li, Chun Lin Lin, Department of Materials Science and Engineering, National Tsing Hua University [Hsinchu] (NTHU), National Institute for Materials Science (NIMS), High Entropy Materials Center, China Steel Corporation, Department of Nanoscience and Nanoengineering, Waseda University, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Authors would like to thank the financial and material supports from China Steel Corporation (Proposal No. RE105620). Chun-Lin Lin would like to thank NIMS for the provision of the international collaborative graduate program (ICGP) scholarship. This work is supported by NIMS under the International Cooperative Graduate Program, and Ministry of Science and Technology (MOST) in Taiwan under Grant MOST110-2221-E-007-020-MY3, MOST110-2224-E-007 -001, and MOST109-2634-F-007-024, and the 'High Entropy Materials Center' from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education.
- Subjects
Materials science ,Condensed matter physics ,Ferromagnetic material properties ,High entropy alloys ,Alloy ,02 engineering and technology ,[CHIM.MATE]Chemical Sciences/Material chemistry ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Thermal expansion ,0104 chemical sciences ,Condensed Matter::Materials Science ,Ferromagnetism ,engineering ,Antiferromagnetism ,Curie temperature ,General Materials Science ,0210 nano-technology ,Invar - Abstract
International audience; This work investigates the thermal expansion behaviors of Fe30Co30Ni30Cr10-xMnx High Entropy Alloys (HEAs) (x = 0, 5, 10 at.%) from 400 K to 1200 K. Interestingly, comparing to that of Cantor alloy, a decrease in Cr and Mn in Co–Cr–Fe–Mn–Ni system could significantly decrease the thermal expansion coefficient by 45.2%; Fe30Co30Ni30Cr10-xMnx (x = 0, 5, 10) also showed an abrupt change in thermal expansion behaviors similar to that of Invar alloys. Experimental and theoretical analysis suggest the abrupt change in thermal expansion behaviors of these HEAs were associated with the transition from ferromagnetism to paramagnetism, and these alloys appear to exhibit the dimensional stability of the Invar effect. Since the Invar effect is related to ferromagnetic properties, the amount of Cr and Mn in the HEAs would influence the suppression of thermal expansion due to different intensity of anti-ferromagnetic coupling effect. This research contributes to the understanding of the thermal expansion behaviors of Co–Cr–Fe–Mn–Ni high entropy alloys and the effects of antiferromagnetic elements
- Published
- 2021
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