| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales IV
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| Presentation Title |
In Situ Studies on Room Temperature Deformability of Nanolaminates and Nanocrystalline Intermetallics |
| Author(s) |
Xinghang Zhang, Ruizhe Su, Dajla Neffati, Yashashree Kulkarni, Nick A. Richter |
| On-Site Speaker (Planned) |
Nick A. Richter |
| Abstract Scope |
Interfaces play an important role on deformation mechanisms of metallic materials with nanoscale microstructures. In this presentation, we will cover two examples of nanostructured materials. In the first example, we will compare the deformation behavior of three Cu/Co multilayer systems with identical layer thickness but different types of layer interfaces. In situ SEM micropillar compression tests show that the three systems have drastically different mechanical behaviors. Molecular dynamics (MD) simulations reveal an unexpected interplay between pre-existing twin boundaries, stacking faults, and incoherent layer interfaces. In the 2nd example, we present a deformable nanocrystalline CoAl intermetallics. In situ studies show that nanocrystalline CoAl exhibits ultra-high yield strength and prominent work hardening ability. TEM studies combined with MD simulations reveal unique deformation mechanisms of the nanocrystalline intermetallics. |