Toward ICME-Based Development of Co-Based Gamma/Gamma-Prime Superalloys: An MGI Case Study

Two-phase gamma (FCC)/gamma-prime (L12) alloys based on the Co-W-Al ternary system exhibit promising high temperature strength and creep resistance; and could potentially operate at higher temperatures compared to their Ni-based analogs presently used in turbine blade and other high temperature applications. Essential to the development of these alloys are accurate descriptions of the microstructural evolution, phase equilibrium, and diffusion in ternary Co-Al-W. These composition-dependent descriptions are being develop as part of a case study under the Materials Genome Initiative (MGI), that is developing and implementing the tools necessary to facilitate efficient materials design via Integrated Computational Materials (Science &) Engineering (ICME). This talk will discuss NIST’s collaborative efforts in the development of a working ontology for phase-based materials data; the construction of data curation tools; and the development and use of open-access federated file repositories; as well as progress in developing phase-based descriptions of thermo-physical properties in Co-W-Al alloys and ultimately employing them in physics based modeling tools to predict mechanical behavior and performance.