[SY-F1] An Integrated Experimental and Computational Approach to Microstructure-Property Relationships in Structural Materials
Invited
Location-specific component design requires modeling capabilities that incorporate specific transformation and deformation mechanisms operating in alloys having different compositions and microstructures under different service conditions. In this presentation, we focus on how to utilize phase-field modeling techniques at different length scales to address this difficult challenge and develop mechanism-based and microstructure-sensitive modeling tools. In particular, using creep deformation in Ni-base superalloys as an example, we demonstrate how to integrate phase-field modeling with experimental characterization and use phase-field method to bridge ab initio calculations and crystal plasticity (CP) simulations to (a) identify transformation / deformation mechanisms and quantify activation pathways, (b) provide “mechanism maps” and microstructure-sensitive constitutive laws for dislocation - microstructure interaction and co-evolution, and (c) develop an integrated phase-field + full-field FFT-based CP modeling framework for collective behavior of precipitate and dislocation microstructures during creep deformation. The work is supported by the National Science Foundation under the DMREF program.