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Mechanical Spectroscopy Study of CrNiCoFeMn High Entropy Alloys
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: Received: 4 April 2023 / Approved: 6 April 2023 / Online: 6 April 2023 (04:46:33 CEST)
A peer-reviewed article of this Preprint also exists.
Campari, E.G.; Casagrande, A. Mechanical Spectroscopy Study of CrNiCoFeMn High-Entropy Alloys. Materials 2023, 16, 3689. Campari, E.G.; Casagrande, A. Mechanical Spectroscopy Study of CrNiCoFeMn High-Entropy Alloys. Materials 2023, 16, 3689.
Abstract
Abstract: The high entropy alloy (HEA) of equiatomic composition CrNiFeCoMn and with FCC 11 crystal structure was prepared by either induction melting and additive manufacturing with a se- 12 lective laser melting (SLM) process, starting from mechanically alloyed powders. Unlike induction 13 melting, the as-produced SLM alloy showed fine nitride and Cr-rich s phase precipitates. Mechan- 14 ical spectroscopy measurements were performed on specimens cold worked and/or recrystallized. 15 Young’s modulus values of (140±10) GPa and (90±10) GPa were measured at 300 K for induction 16 melted and SLM samples, respectively. The values increased to (160±10) GPa and (170±10) GPa for 17 recrystallized samples. Damping measurements as a function of temperature showed two peaks 18 which were attributed to dislocations bending and grain boundaries sliding. The peaks were super- 19 posed on a temperature increasing background.
Keywords
high entropy alloys; selective laser melting; microstructure; mechanical properties; damping; Young’s modulus
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
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.
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