About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Illuminating Ductile Failure Via X-Ray Diffraction-Based Imaging |
| Author(s) |
Jose Javier Solano, Sven E. Gustafson, Philip J. Noell, Krzysztof S. Stopka, Jun-Sang Park, Peter Kenesei, Kyle L. Johnson, Michael D. Sangid |
| On-Site Speaker (Planned) |
Jose Javier Solano |
| Abstract Scope |
Ductile rupture is a common failure mode for metals. It is generally divided into three stages: nucleation, growth, and coalescence of microscopic voids. Standard models for ductile rupture have limited precision for predicting macroscopic failure because they have been calibrated using ex-situ observations of these three stages corroborated by strain or stress metrics calculated using classical plasticity. In this study, in-situ high-energy x-ray characterization was conducted at the Advanced Photon Source (under DOE Contract DE-AC02-06CH11357) to correlate sites of the three stages of ductile rupture with grain-scale stresses. There was no observed correlation between void nucleation via particle cracking and neighboring grain-average stress triaxiality, which disagrees with standard models. Crack growth first occurred through crystallographic slip, then through interconnectivity of secondary particles or voids. These observations demonstrate grain-scale mechanisms of ductile failure which differ from conventional specimen-scale approaches. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Other, Aluminum |