Multi-scale computational modeling of lightweight aluminum-lithium alloys

dc.contributor.authorAcar, Pinaren
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2019-04-01T17:18:03Zen
dc.date.available2019-04-01T17:18:03Zen
dc.date.issued2019-03-07en
dc.description.abstractThe present study addresses the multi-scale computational modeling of a lightweight Aluminum-Lithium (Al-Li) 2070 alloy. The Al-Li alloys display significant anisotropy in material properties because of their strong crystallographic texture. To understand the relationships between processing, microstructural textures at different material points and tailored material properties, a multi-scale simulation is performed by controlling the texture evolution during deformation. To achieve the multi-scale framework, a crystal plasticity model based on a one-point probability descriptor, Orientation Distribution Function (ODF), is implemented to study the texture evolution. Next, a two-way coupled multi-scale model is developed, where the deformation gradient at the macro-scale integration points is passed to the micro-scale ODF model and the homogenized stress tensor at the micro-scale is passed back to the macro-scale model. A gradient-based optimization scheme which incorporates the multi-scale continuum sensitivity method is utilized to calibrate the slip system parameters of the alloy using the available experimental data. Next, the multi-scale simulations are performed for compression and tension using the calibrated crystal plasticity model, and the texture data is compared to the experiments. With the presented multi-scale modeling scheme, we achieve the location-specific texture predictions for a new generation Al-Li alloy for different deformation processes. © 2019 The Authoren
dc.description.notesThis work was supported by Virginia Polytechnic Institute and State University .en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1016/j.heliyon.2019.e01225en
dc.identifier.issn24058440en
dc.identifier.issue3en
dc.identifier.othere01225en
dc.identifier.urihttp://hdl.handle.net/10919/88793en
dc.identifier.volume5en
dc.language.isoen_USen
dc.publisherElsevier Ltden
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectMaterials scienceen
dc.titleMulti-scale computational modeling of lightweight aluminum-lithium alloysen
dc.title.serialHeliyonen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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