About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Estimating Stress on the Microstructural Length Scale Using the Measured Strain Field |
Author(s) |
Benjamin Cameron, Cem Tasan |
On-Site Speaker (Planned) |
Benjamin Cameron |
Abstract Scope |
A significant challenge in metallurgy is estimating the heterogeneous stress distribution at a microstructural length scale. Recently a new approach has been developed to compute the stress field from a measured strain field through solving a linear hyperbolic set of partial differential equations. We show how this approach can be applied to in-situ deformation experiments in order to accurately compute the stress. Specifically, in-situ tensile experiments are conducted in an electron microscope on samples of electrodeposited copper with columnar grains. This enables a number of assumptions such as transverse isotropy to be made. The strain field is measured by tracking points and the stress is computed by solving the equations mentioned above. Using these results, we analyze the variance in the stress-strain relationship and relate it to the local microstructural geometry. This gives insight into which microstructural geometries have desirable mechanical properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Characterization, Mechanical Properties |