Determining material parameters using phase-field simulations and experiments

Research output: Research - peer-reviewJournal article – Annual report year: 2017

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A method to determine material parameters by comparing the evolution of experimentally determined 3D microstructures to simulated 3D microstructures is proposed. The temporal evolution of a dendritic solid-liquid mixture is acquired in situ using x-ray tomography. Using a time step from these data as an initial condition in a phase-field simulation, the computed structure is compared to that measured experimentally at a later time. An optimization technique is used to find the material parameters that yield the best match of the simulated microstructure to the measured microstructure in a global manner. The proposed method is used to determine the liquid diffusion coefficient in an isothermal Al-Cu alloy. However, the method developed is broadly applicable to other experiments in which the evolution of the three-dimensional microstructure is determined in situ. We also discuss methods to describe the local variation of the best-fit parameters and the fidelity of the fitting. We find a liquid diffusion coefficient that is different from that measured using directional solidification.
Original languageEnglish
JournalActa Materialia
Volume129
Pages (from-to)229-238
ISSN1359-6454
DOIs
StatePublished - 2017

Bibliographical note

This is an open access article under the CC BY-NCND license

CitationsWeb of Science® Times Cited: 4

    Research areas

  • Phase-field method, X-ray tomography, Coarsening, Al alloys, Temporal evolution
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