About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Uncertainty Quantification in Data-Driven Materials and Process Design
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Presentation Title |
Anisotropic Creep Modeling and Uncertainty Quantification of an Electron Beam Melted AM Ni-Based Superalloy |
Author(s) |
Patxi Fernandez-Zelaia, Yousub Lee, Sebastien Dryepondt, Michael Kirka |
On-Site Speaker (Planned) |
Patxi Fernandez-Zelaia |
Abstract Scope |
Electron beam melting powder bed fusion is a promising technology for fabricating high temperature nickel based superalloys. The microstructure exhibits a strong build direction fiber texture which is believed to drive anisotropic creep behavior. In this work we present a crystal plasticity model, which incorporates non-Schmid effects, developed for additively manufactured IN738LC. The probabilistic calibration is performed to quantify model parameter uncertainty. A sequential design approach is utilized to infer the probability density of these constitutive parameters. The established model is utilized to study the behavior of equiaxed grain clusters sometimes observed within in the nominally columnar structure. Uncertainty is propagated from the constitutive model parameters to the full-field response. These features are a source of localized strain accumulation which agrees with experimentally obtained micrographs. |
Keywords |
Ceramics, |