| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XIII)
|
| Presentation Title |
Discerning Intragranular and Interfacial Plasticity in Cu/Nb Nanolaminates |
| Author(s) |
Xiaolong Ma, Bharat Gwalani, Jinhui Tao, Mert Efe, Matthew Olszta, Thomas J. Nizolek, John S. Carpenter, Arun Devaraj, Suveen Mathaudhu, Aashish Rohatgi |
| On-Site Speaker (Planned) |
Mert Efe |
| Abstract Scope |
Disentangling the intragranular and interfacial plasticity contribution to the overall strain accommodation is crucial to understanding the microstructural evolution and mass transport upon deformation in materials with the nanoscale feature size. In this talk, we present a new approach to tackle the issue by introducing shear strain gradients into Cu/Nb nanolaminates of different layer thicknesses with the shear perpendicular to the laminate interfaces. Measuring the strain gradient and the resultant lattice disorientation enables a quantitative understanding of the intragranular and interfacial plasticity contribution. We found that intragranular slip entirely governs the deformation in the 300 nm-layer laminate and, unexpectedly, contributes ∼80% of the total plasticity in the 30 nm-layer laminate. The high intragranular plasticity in the thin laminate is attributed to the large width of confined slip planes and their remnant potential for storing dislocations. Our method and findings shed light on the deformation mechanism behavior in nanostructured materials |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, |