|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||Heat Treatment and Property Optimization Study of Refractory Complex Concentrated Alloys
||Cameron McNamara, David Smathers, Marie Thomas, Chris Kantner
|On-Site Speaker (Planned)
Complex Concentrated Alloys (CCAs), particularly those containing refractory elements, have the potential to surpass current high temperature alloy performance. A CALPHAD-informed Integrated Computational Materials Engineering (ICME) approach has been used to identify novel refractory CCA compositions of interest for these applications.
This paper describes results from an experimental program evaluating the effect of solution treatment and artificial aging on microstructure and mechanical properties of five Nb-based alloys. Prototype 15-lb ingots were cast, homogenized, and thermo-mechanically processed to produce material for this study. Solution and aging experiments were performed to validate calculated phase behavior and suggest temperature ranges in which to optimize processing and mechanical properties. Microstructural characterization and mechanical testing were performed to develop the process-structure-property relationship for these refractory CCAs.