About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Multiscale Characterization of Deformation and Defect Structures During Continuous Bending Under Tension in Commercially Pure Titanium |
Author(s) |
Nathan Miller, David Fullwood, Michael Miles, Asher Webb, Addison McClure, Marko Knezevic, Brad Kinsey, Nicholas Pitkin, Tasnim Oishi, Desmond Mensah |
On-Site Speaker (Planned) |
Nathan Miller |
Abstract Scope |
Continuous bending under tension (CBT) has been shown to increase the room temperature elongation-to-failure (ETF) in various materials. However, microstructural mechanisms behind the improvements are still not well understood. This work, focusing on commercially pure titanium’s potential as a structural material, combines multiple characterization techniques, together with crystal plasticity and strain-gradient models, to illuminate the interrelated contributions from slip system activity, associated hardening rates, strain gradients and backstress, twinning and de-twinning, and damage evolution in the sheet. High resolution EBSD characterization of geometrically necessary dislocation (GND) structures, together with XRD-based evaluations of total dislocation density and observations of twinning/de-twinning activity, combined with digital image correlation (DIC), in-plane and through-thickness, are compared with simulation prediction to better understand mechanisms for deformation behavior. Initial observations indicate gradients in hardening and damage behavior between the sheet surfaces, which are subjected to cyclical load reversals, and the central region that is consistently in tension. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Characterization, Modeling and Simulation |