|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Microstructure and Mechanical Properties of FeCoNiCr High-entropy Alloy Strengthened by Nano-Y2O3 Dispersion
||Xiong-Jun Liu, Bei Jia, Hui Wang, Yuan Wu, Zhao-Ping Lu
|On-Site Speaker (Planned)
In this talk, we will deliver our recent studies on the oxide-dispersion-strengthened (ODS) single-phase FCC FeCoNiCr high-entropy alloy. The FeCrCoNi high-entropy alloy strengthened by nano-Y2O3 particles was synthesized via mechanical alloying and spark plasma sintering. Effects of Y2O3 additions on the microstructure and mechanical properties were investigated. The ODS high-entropy alloy bearing 5wt% Y2O3 was found to have a finer grain with respect to the alloy without oxides. As a consequence, the yield strength is increased from 654 to 1754 MPa, and the fracture strength reaches up to 2325 MPa while the plasticity decreased appreciably for the ODS high-entropy alloy. The synergistic effects of grain size hardening and particle strengthening on mechanical properties of the ODS high-entropy alloy were discussed. This finding indicates that the addition of nano-scaled oxides is an effective and feasible approach to designing high-entropy alloys with superior mechanical properties.
||Planned: Supplemental Proceedings volume