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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Recent Investigations and Developments of Titanium-containing High Entropy Alloys
Presentation Title Effect of elemental combination on microstructure and mechanical properties of refractory medium entropy alloys
Author(s) Shuhei Yoshida, Qian He, Hideyuki Yasuda, Nobuhiro Tsuji
On-Site Speaker (Planned) Shuhei Yoshida
Abstract Scope Refractory medium entropy alloys (RMEAs) are alloys composed of four or fewer refractory elements (e.g., Nb and Ta) with near equiatomic composition. The present study clarified the effect of elemental combination on microstructure and mechanical properties of RMEAs. Ingots of RMEAs (e.g., HfNbTiZr) having various compositions, which are sub-systems of the HfNbTaTiZr high entropy alloy, were fabricated by using vacuum arc-melting of pure metals. Microstructures of the as-cast materials were found to be classified into three groups depending on the location along solidification direction. Homogenization was performed to remove segregation originated from the solidification process. Tensile tests at room temperature revealed that the as-cast RMEAs mainly exhibited brittle fracture, while they became ductile after the homogenization. We attributed this change in mechanical properties to the removal of elemental segregation through the homogenization process. The relationship among the chemical composition, segregation behavior, and mechanical properties will be discussed in the presentation.
Proceedings Inclusion? Planned: None Selected
Keywords High-Entropy Alloys, Mechanical Properties, Solidification

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A data-driven analysis for selection of Ti-containing high entropy alloys and future directions
Biocompatible titanium containing medium and high entropy alloys
Compositional Dependence of the (TiZrHf)50Ni25Co10Cu15 High Entropy Alloy Shape Memory Properties
Design and characterization of novel Ti-Zr-Nb-Mn-Fe medium and high entropy alloys for biomedical applications
Designing porous refractory high entropy alloy using the dealloying method
Effect of elemental combination on microstructure and mechanical properties of refractory medium entropy alloys
Effect of Hf and Zr composition on the phase equilibria and transformation temperatures of the (TiZrHf)50Co10Ni25Cu15 multi-principal element shape memory alloy
Enhanced mechanical properties of Ti60(NbVCr)34Al6 medium entropy by thermomechanical treatment
Evolution of Microstructure and Deformation Substructure in Al1 Mo0.5 Nb1Ta0.5Ti1Zr1, a Refractory HEA Alloy with Disordered BCC Precipitates Embedded in a Continuous Ordered B2 Matrix
Gas tungsten arc welding of Cr29.7Co29.7Ni35.4Al4Ti1.2 (at.%) high entropy alloy
In-Situ Laser-Deposited Ti-Based High Entropy Alloys for Aerospace Applications
INFLUENCE OF LASER IN-SITU DIRECT ENERGY DEPOSITION ON THE MECHANICAL PROPERTIES OF HIGH ENTROPY ALLOYS
Investigation of the BCC Phase Formation Region in the Al-Cr-Fe-Ti-V High-Entropy Alloys by Using High-Throughput Computational Method.
Investigation of the Temperature Dependence of Tensile Deformation Substructures in NbTiZr , Single Phase Equiatomic BCC Refractory High Entropy Alloy (RHEA)
Neural-Network based atomistic simulation on chemical ordering formation and its kinetics in medium entropy alloys
Phase stability and the role of Ti in W-Ta-Ti-Cr-V high-entropy alloys from the first principles thermodynamic study with experimental validation
Phase stability of hcp-HEAs containing Ti
Predicting the compositions of an Al-Co-Fe-Ni-Ti high-entropy system by the calculation of phase diagrams method coupled with high-throughput computations
Single-crystal mechanical properties of equiatomic and non-equiatomic high-entropy alloys
Solidification Microstructure of High Entropy Alloys Composed with 3d transition metal and silicon

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