Table of Contents
Entropy, Volume 21, Issue 2 (February 2019)
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Cover Story (view full-size image) The compositionally complex alloy Al10Co25Cr8Fe15Ni36Ti6 stands out for its potential application [...] Read more. The compositionally complex alloy Al10Co25Cr8Fe15Ni36Ti6 stands out for its potential application around 800 °C. Its mechanical properties are influenced by the casting procedure and heat treatment. Directional solidification leads to better and reproducible high-temperature tensile test results. The microstructure and tensile properties can also be modified by adding Mo and Hf. The microstructure, consisting of fcc-matrix, γ' and Heusler phase, is retained, but shape and volume fractions of the phases change with these elements. After optimization of heat treatment, Hf promotes more cubic γ' precipitates, a globular Heusler phase, and better tensile strength than the base alloy. Mo has no influence on the Heusler phase but makes γ' precipitates rounder and decreases the tensile strength. View this paper.