|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Microstructural Evolution and Mechanical Behavior of NbTaTiV Refractory High-entropy Alloy at Elevated Temperatures
||Chanho Lee, Gian Song, Michael C Gao, Rui Feng, Peiyong Chen, Yan Chen, Ke An, Wei Guo, Jonathan Poplawsky, Song Li, Alice Hu, Wei Chen, Hahn Choo, Peter K Liaw
|On-Site Speaker (Planned)
The design and development of single-phase high-entropy alloys (HEAs) with uniform elemental distributions is important to explicitly understand the widely-proposed effect of maximized entropy of mixing, such as lattice distortion, and sluggish diffusion. However, there is a still challenge of developing single phase HEAs with homogeneous elemental distributions, because of the occurrence of elemental segregation and presence of secondary phases after alloying or heat treatments. In this study, we have developed and systematically investigated a NbTaTiV refractory HEA with a single body-centered cubic (BCC) structure using integrated experimental and modeling methods. A single BCC solid-solution throughout the sample was achieved by systematic heat-treatment, and this HEA alloy exhibits excellent mechanical properties at room as well as elevated temperatures. The effect of the high entropy of mixing on the mechanical properties will be discussed in terms of heavy lattice-distortion and solid-solution strengthening.
||Planned: Supplemental Proceedings volume