Work

An integrated computational materials engineering framework for process–structure–property mapping in laser powder bed fusion

Year: 2025

Type: article

Abstract: This work presents a comprehensive, experimentally validated integrated computational materials engineering framework for mapping the process-structure-property relationships in laser powder bed fusion (l-PBF) of Hastelloy-X alloys. The framework couples heat transfer, cellular automata (CA) solidification, and crystal plasticity finite elements (CPFE) simulations within one workflow. The heat transfer model was calibrated using single-track experiments and Bayesian inference to accurately capture melt pool geometry and the transition from conduction to keyhole melting. The CA model, driven by thermal simulation data, successfully reproduced key microstructural features, including the equiaxed-to-columnar grain transition and the formation of a strong crystallographic texture. The mechanical behavior was then predicted by CPFE simulations on representative volume elements extracted from the CA microstructures, revealing a direct correlation between crystallographic texture and macroscopic mechanical properties. The framework was applied to the mapping of the (P,v) process space, identifying distinct regions based on defect formation, microstructure and mechanical response. This validated approach offers a robust and efficient alternative to experimental trial-and-error identification of optimal process window, paving the way for data-driven optimization of l-PBF processes. • Produces comprehensive process–microstructure maps across laser power–speed (P, v). • Enables systematic microstructure prediction over the full print parameter space. • Calibrated with single-track experiments; captures conduction–keyhole and texture trends. • Provides design-ready maps to select process windows for targeted microstructures.

Source: Materials & Design

DOI: 10.1016/j.matdes.2025.115097

Authors: Fabien Briffod, Phuangphaga Daram, Masahiro Kusano, Makoto Watanabe

Institution: National Institute for Materials Science

Language: English

Topic: Additive Manufacturing Materials and Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,650

Funders: American Theological Library Association, Japan Society for the Promotion of Science London, Japan Society for the Promotion of Science