Senary Refractory High-Entropy Alloy HfNbTaTiVZr
Document Type
Article
Publication Date
7-1-2016
Abstract
Discovery of new single-phase high-entropy alloys (HEAs) is important to understand HEA formation mechanisms. The present study reports computational design and experimental validation of a senary HEA, HfNbTaTiVZr, in a body-centered cubic structure. The phase diagrams and thermodynamic properties of this senary system were modeled using the CALPHAD method. Its atomic structure and diffusion constants were studied using ab initio molecular dynamics simulations. The microstructure of the as-cast HfNbTaTiVZr alloy was studied using X-ray diffraction and scanning electron microscopy, and the microsegregation in the as-cast state was found to qualitatively agree with the solidification predictions from CALPHAD. Supported by both simulation and experimental results, the HEA formation rules are discussed.
Publication Source (Journal or Book title)
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
First Page
3333
Last Page
3345
Recommended Citation
Gao, M., Zhang, B., Yang, S., & Guo, S. (2016). Senary Refractory High-Entropy Alloy HfNbTaTiVZr. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 47 (7), 3333-3345. https://doi.org/10.1007/s11661-015-3105-z