How Atomic Bonding Plays the Hardness Behavior in the Al–Co–Cr–Cu–Fe–Ni High Entropy Family

Autor: Andrea Fantin, Giovanni O. Lepore, Michael Widom, Sergey Kasatikov, Anna M. Manzoni
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Small Science, Vol 4, Iss 2, Pp n/a-n/a (2024)
Druh dokumentu: article
ISSN: 2688-4046
DOI: 10.1002/smsc.202300225
Popis: A systematic study on a face‐centered cubic‐based compositionally complex alloy system Al–Co–Cr–Cu–Fe–Ni in its single‐phase state is carried out, where a mother senary compound Al8Co17Cr17Cu8Fe17Ni33 and five of its suballoys, obtained by removing one element at a time, are investigated and exhaustively analyzed determining the contribution of each alloying element in the solid solution. The senary and the quinaries are compared using experimental techniques including X‐ray absorption spectroscopy, X‐ray diffraction, transmission electron microscopy, and first principles hybrid Monte Carlo/molecular dynamics simulations. Chemical short‐range order and bond length distances have been determined both at the experimental and computational level. Electronic structure and local atomic distortions up to 5.2 Å have been correlated to the microhardness values. A linear regression model connecting hardness with local lattice distortions is presented.
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