|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Microstructure and Mechanical Properties of a Nanostructured High Entropy Alloy Processed via Severe Plastic Deformation
||Yaojun Lin, Zhigang Yan, Fei Chen, Enrique J. Lavernia
|On-Site Speaker (Planned)
As a new class of materials, high entropy alloys (HEAs) are attracting considerable interest worldwide. However, nanostructured HEAs have hitherto received limited attention. In this talk, we report microstructure and tensile properties of a nanostructured HEA Fe25Co25Cr25Ni25 (at.%) produced via severe plastic deformation: heavy rolling at room temperature with a thickness reduction ratio of 85-95%, followed by annealing. Microstructures in as-rolled and annealed materials are studied using transmission electron microscopy (TEM), high resolution TEM (HRTEM) and transmission Kikuchi diffraction (TKD). The mechanical properties of the HEA processed are measured via tensile testing. Our results indicate that nanostructured and ultra-fine grains can be attained via well-controlled annealing, and that the nanostructured HEA exhibits an acceptable combination of strength and ductility. Based on the results in the present work, we discuss the future directions to increase ductility of, and to achieve excellent combination of strength and ductility in, nanostructured HEAs.
||Planned: Supplemental Proceedings volume