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Meeting Materials Science & Technology 2020
Symposium Multiscale Modeling of Microstructure Deformation in Material Processing
Presentation Title Modeling Mechanical Response of Microtextured Regions in Hexagonal Metals
Author(s) Joseph C. Tucker, Sushant Jha, Sean Donegan, James Larsen, Adam Pilchak
On-Site Speaker (Planned) Joseph C. Tucker
Abstract Scope Crystallographic texture affects most physical properties in anisotropic materials. A particular spatial arrangement in hexagonal metals known to adversely affect fatigue properties are clusters of similarly oriented grains known as microtextured regions (MTRs), which may behave as larger individual features depending on the details of their internal crystallography. This work briefly introduces leveraging electron backscatter diffraction (EBSD) to segment and characterize MTRs with automated tools, while the focus is on Fast Fourier Transform (FTT) simulations evolving mechanical response at the mesoscale to interrogate MTR behavior. A case study using representative titanium EBSD data containing MTRs is presented, including the FFT boundary conditions, elastic and plastic properties, and imposed stress state. The reliability of the EBSD segmentation is assessed and the segmentations are compared to the FFT result thus establishing confidence in the segmentation and simulation. The results of the segmentation are used in a microtexture and dwell-time-dependent crack growth model.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Development of the Coupled Cellular Automata/Finite Difference Model of Phase Transformation during Continuous Cooling
Modeling Mechanical Response of Microtextured Regions in Hexagonal Metals
Multiscale Approach to Model Deformation Behavior of Multilayered Sheets Produced by Explosive Cladding
The Research Thermoplastic Deformation Modes of Dual-phase Special Alloys for Obtaining Rational Intermetallic Structure

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