Process-structure-property modeling for postbuild heat treatment of powder bed fusion Ti-6Al-4V
Liu, Jianxin Yang, Xinyu Chai, Xingzai Boccardo, Adrian Chen, Yefeng Wang, Xiaowei Leen, Sean B. Gong, Jianming
Liu, Jianxin
Yang, Xinyu
Chai, Xingzai
Boccardo, Adrian
Chen, Yefeng
Wang, Xiaowei
Leen, Sean B.
Gong, Jianming
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Publication Date
2023-07-10
Type
Article
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Liu, Jianxin, Yang, Xinyu, Chai, Xingzai, Boccardo, Adrian, Chen, Yefeng, Wang, Xiaowei, Leen, Seán B., Gong, Jianming. (2023). 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, 14644207231174696. doi: 10.1177/14644207231174696
Abstract
Postbuild heat treatment is an important component in optimized manufacturing processing for laser beam powder 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.
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Publisher
SAGE Publications
Publisher DOI
10.1177/14644207231174696
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Attribution 4.0 International (CC BY 4.0)