Microstructure-property prediction of a Ni-based superalloy: A combined phase-field and finite element modelling approach

TL;DR

This paper presents a multiscale modeling approach combining phase-field and finite element methods to predict the microstructure and elastic properties of a Ni-based superalloy, aiding materials design.

Contribution

It introduces an integrated physics-based model linking microstructure evolution with mechanical properties using phase-field and finite element simulations.

Findings

Microstructure evolution regimes identified

Elastic properties correlated with composition and temperature

Model validated against experimental data

Abstract

Multiscale modelling is a new paradigm that has emerged in recent times to study the well-known problem of the process-structure-property relationship in the area of materials science and engineering. For obtaining the desired performance for materials of strategic importance, such as superalloys, it is essential to bridge different length and time scales in order to navigate the entire design space. In the present study, we develop a physics-based model for a Ni-based superalloy where the microstructures simulated using a phase-field model serve as input to finite-element computations. We examine the alloy's microstructure evolution and effective elastic properties quantitatively via phase-field and finite element methods integrated with CALPHAD database, by varying composition and aging temperature. The phase-field simulations provide us with an insight into the different regimes of microstructure evolution. The finite element analysis uncovers the relation of effective elastic properties with several system parameters.