|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Refractory Metallic Materials
||Refractory Development Framework Using Computational Modeling
||Nathan Daubenmier, Antonio Ramirez, Fredrick Michael, Jeffrey Sowards, Omar Mireles
|On-Site Speaker (Planned)
The high melting temperature of refractory alloys is beneficial for specialized flight applications including Nuclear Thermal Propulsion, green propulsion, and hypersonic flight. Refractory elements such as tungsten and molybdenum, however, often compromise material strength and microstructure due to post solidification cracking and low strength. The high cost of acquisition and production of refractory alloys makes a widescale study of substitutional and interstitial elemental additions difficult. Computational modeling methods including calculation of phase diagrams (CALPHAD) provide cost and time effective options for analyzing wide compositional ranges to determine the effect of alloying methods for target material properties. A comprehensive analysis of a refractory system investigated grain growth, grain pinning, strength, DBTT, and other thermodynamic results to allow for down selection of alloying elements for ideal post-solidification material properties. This procedure is suggested as a framework for refractory alloy development to improve the starting point of physical production and testing of alloys.
||Additive Manufacturing, Modeling and Simulation, Solidification