Print Email Facebook Twitter Physical metallurgy-guided machine learning and artificial intelligent design of ultrahigh-strength stainless steel Title Physical metallurgy-guided machine learning and artificial intelligent design of ultrahigh-strength stainless steel Author Shen, Chunguang (Northeastern University China) Wang, Chenchong (Northeastern University China) Wei, Xiaolu (Northeastern University China) Li, Yong (Northeastern University China) van der Zwaag, S. (TU Delft Novel Aerospace Materials) Xu, W. (TU Delft Novel Aerospace Materials; Northeastern University China) Date 2019 Abstract With the development of the materials genome philosophy and data mining methodologies, machine learning (ML) has been widely applied for discovering new materials in various systems including high-end steels with improved performance. Although recently, some attempts have been made to incorporate physical features in the ML process, its effects have not been demonstrated and systematically analysed nor experimentally validated with prototype alloys. To address this issue, a physical metallurgy (PM) -guided ML model was developed, wherein intermediate parameters were generated based on original inputs and PM principles, e.g., equilibrium volume fraction (Vf) and driving force (Df) for precipitation, and these were added to the original dataset vectors as extra dimensions to participate in and guide the ML process. As a result, the ML process becomes more robust when dealing with small datasets by improving the data quality and enriching data information. Therefore, a new material design method is proposed combining PM-guided ML regression, ML classifier and a genetic algorithm (GA). The model was successfully applied to the design of advanced ultrahigh-strength stainless steels using only a small database extracted from the literature. The proposed prototype alloy with a leaner chemistry but better mechanical properties has been produced experimentally and an excellent agreement was obtained for the predicted optimal parameter settings and the final properties. In addition, the present work also clearly demonstrated that implementation of PM parameters can improve the design accuracy and efficiency by eliminating intermediate solutions not obeying PM principles in the ML process. Furthermore, various important factors influencing the generalizability of the ML model are discussed in detail. Subject Alloy designMachine learningPhysical metallurgySmall sample problemStainless steel To reference this document use: http://resolver.tudelft.nl/uuid:f1254cd4-f218-49a9-a854-115742be8de0 DOI https://doi.org/10.1016/j.actamat.2019.08.033 Embargo date 2020-02-01 ISSN 1359-6454 Source Acta Materialia, 179, 201-214 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2019 Chunguang Shen, Chenchong Wang, Xiaolu Wei, Yong Li, S. van der Zwaag, W. Xu Files PDF 1_s2.0_S1359645419305452_main.pdf 4 MB Close viewer /islandora/object/uuid:f1254cd4-f218-49a9-a854-115742be8de0/datastream/OBJ/view