Liu, JianxinYang, XinyuChai, XingzaiBoccardo, AdrianChen, YefengWang, XiaoweiLeen, Seán BGong, Jianming2025-01-302025-01-302023-07-10Liu J, Yang X, Chai X, et al. Process-structure-property modeling for postbuild heat treatment of powder bed fusion Ti-6Al-4V. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2023;237(10):2137-21501464-4207https://hdl.handle.net/10115/70879This research was partially fund by Science Foundation Ireland as part of I-Form Advanced Manufacturing Research Centre under grant number 16/RC/3872.Postbuild heat treatment is an important component in optimized manufacturing processing for laser beampowder bed fusion (PBF-LB) Ti-6Al-4V. The development of predictive modeling, based on the understanding of the relationships between process parameters, microstructure evolution, and mechanical properties, is a potentially key ingredient in this optimization process. In this paper, a process-structure-property (PSP) model is developed to predict the effect of postbuild heat treatment on yield strength, which is a key tensile property for PBF-LB Ti-6Al-4V. The process-structure part is developed with a focus on the prediction of solid-state phase transformation, especially dissolution of martensite during the heating phase. Subsequent tensile properties are quantified by a microstructure-sensitive yield strength model based on the predicted microstructure variables. The integrated PSP model is validated via experimentally measured phase fraction, α lath width and monotonic tensile tests on PBF-LB Ti-6Al-4V with different heat treatment temperatures, for identification of optimal process parameters.enLaser beam powder bed fusionTi-6Al-4VSolid-state phase transformationYield strengthHeat treatmentArticle10.1177/14644207231174696info:eu-repo/semantics/closedAccess