Alloy Design and Properties Optimization of High-Entropy Alloys View Full Text


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Article Info

DATE

2012-07-10

AUTHORS

Y. Zhang, X. Yang, P. K. Liaw

ABSTRACT

This article reviews the recent work on the high-entropy alloys (HEAs) in our group and others. HEAs usually contain five or more elements, and thus, the phase diagram of HEAs is often not available to be used to design the alloys. We have proposed that the parameters of δ and Ω can be used to predict the phase formation of HEAs, namely Ω ≥ 1.1 and δ ≤ 6.6%, which are required to form solid-solution phases. To test this criterion, alloys of TiZrNbMoVx and CoCrFeNiAlNbx were prepared. Their microstructures mainly consist of simple body-centered cubic solid solutions at low Nb contents. TiZrNbMoVx alloys possess excellent mechanical properties. Bridgman solidification was also used to control the microstructure of the CoCrFeNiAl alloy, and its plasticity was improved to be about 30%. To our surprise, the CoCrFeNiAl HEAs exhibit no apparent ductile-to-brittle transition even when the temperatures are lowered from 298 K to 77 K. More... »

PAGES

830-838

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11837-012-0366-5

DOI

http://dx.doi.org/10.1007/s11837-012-0366-5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1050266430


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