|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||Design of Novel Precipitate Strengthened Al-Co-Cr-Fe-Nb-Ni High-entropy Alloys
||Martin Detrois, Stoichko Antonov, Sammy Tin
|On-Site Speaker (Planned)
A series of non-equiatomic Al-Co-Cr-Fe-Nb-Ni high-entropy alloys, with varying levels of Co and Nb, were investigated in an effort to obtain microstructures similar to conventional Ni-base superalloys. Although elevated levels of Nb and Co were observed to increase the solvus temperature of the γ’ precipitates, they also promoted the formation of Nb-rich intermetallic phases that formed during solidification and remained undissolved during homogenization. Lowering the content of either the Nb or Co prevented the formation of undesirable phases and resulted in finer γ’ precipitates while lowering the Co content alone resulted in a higher number and density of the γ’ precipitates. Various aging treatments were studied and allowed to control the size and distribution of the strengthening phase that formed during cooling. Results from the microstructural characterization and mechanical property assessments of these two-phase high-entropy alloys will be presented and discussed.
||Planned: Supplemental Proceedings volume