AUTHOR=Han Bin , He Feng , Xia Linfei , Wang Zhijun , Kai Ji Jung 

TITLE=Effect of Ti/Al Ratio on the Elemental Partitioning in the Face-Centered Cubic-Based γ-γ′ Dual-Phase High Entropy Alloy Studied by Atom Probe Tomography

JOURNAL=Frontiers in Materials

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2022.806237

DOI=10.3389/fmats.2022.806237

ISSN=2296-8016

ABSTRACT=<p>The effect of Ti/Al ratio on the elemental partitioning in the Ni<sub>2</sub>CoFeCrTi<sub>x</sub>Al<sub>y</sub> high entropy alloy was studied by atom probe tomography (APT). The APT results indicate that the γ′ nanoparticles have a composition of (NiCoFeCr)<sub>3</sub>TiAl which is independent of Ti/Al ratio. The effect of Ti/Al ratio on the partitioning behaviors of Fe and Cr are significantly different from that of Co. The decreasing of Ti/Al ratio significantly enhanced the incorporation of Fe and Cr into the γ′ nanoparticles. However, the concentration of Co in the γ′ nanoparticles declined with the decrease of Ti/Al ratio.</p>