|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||HH-7: Microstructural Characterization in AlxCrFeMnTix advanced Light Weight High-Entropy Alloys
||Chanho Lee, Peiyong Chen, Rui Feng, Michael Gao, Fan Zhang, Chuan Zhang, Peter K Liaw
|On-Site Speaker (Planned)
The high entropy-alloys (HEAs) have been highlighted due to their extraordinary mechanical properties, such as the great combination of high strength and ductility, compared to conventional materials. Especially, the AlCoCrCuFeNi system, which contains BCC and FCC solid solution phases, shows outstanding solid-solution hardening induced by the large lattice distortion. In this study, we attempt to develop a new HEA with low density and great mechanical properties, while retaining the simple solid-solution microstructure. To this end, AlxCrFeMnTi0.25 with x = 1.0, 2.0, 3.0 and 4.0 HEAs were designed by the CALculation of PHAse Diagrams (CALPHAD) approach and investigated using the synchrotron and X-ray diffraction (XRD). The HEAs with 1.0 and 2.0 atomic percent (at. %), Al contents are identified as the simple BCC solid-solution microstructure, whereas the further addition of Al (3 and 4 at. %) forms Laves and L21 phases distributed in the BCC solid solution matrix.
||Planned: A print-only volume