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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
Presentation Title Strain and Temperature Effects on Homogenization Length Scales of Slip System Activity in α-Titanium via Grain-Resolved X-Ray Diffraction
Author(s) Rachel Lim, Paul A. Shade, Darren C. Pagan
On-Site Speaker (Planned) Rachel Lim
Abstract Scope Predictive modeling of polycrystalline materials deformation relies on a robust understanding of grain-scale heterogeneity and the statistical representativeness of measured micromechanical properties. This study investigates the strain and temperature dependence of homogenization length scales and slip system activity at 25°C and 355°C using high energy X-ray diffraction microscopy (HEDM). By systematically varying subvolume size, and by analyzing spatial heterogeneity in resolved shear stress (RSS) across prismatic <a>, basal <a>, and pyramidal <c+a> slip systems, we demonstrate that statistical representativeness is strongly slip-system- and condition-dependent. These findings highlight the limitations of traditional bulk-based approaches and underscore the necessity for slip-system-aware strategies in experimental design and micromechanical modeling.
Proceedings Inclusion? Planned:
Keywords Characterization, Mechanical Properties,

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