About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales III
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Presentation Title |
Now On-Demand Only - An Integrated Modeling-experiment Approach to Investigating Metallic Interfaces Containing 3D Character |
Author(s) |
Nathan A. Mara, Justin Y. Cheng, Zezhou Li, Shuozhi Xu, Youxing Chen, Jonathan Poplawsky, Nan Li, Irene J. Beyerlein |
On-Site Speaker (Planned) |
Nathan A. Mara |
Abstract Scope |
2-dimensional (2-D) sharp interfaces with distinct boundaries demarcating an abrupt discontinuity in material properties in nanolayered composites been shown to be responsible for enhanced behaviors such as strength, radiation damage tolerance, and deformability. However, 2-D interfaces have limitations with respect to deformability and toughness. 3-D interfaces are defined as heterophase interfaces that extend out of plane into the two crystals on either side and are chemically, crystallographically, and/or topologically divergent, in three dimensions, from both crystals they join. Here, we focus on the thermal stability and mechanical behavior of nanolayered Cu/Nb containing interfaces with 3-D character. Micropillar compression results show that the strength and deformability of Cu/Nb nanocomposites containing 3-D interfaces is significantly greater than those containing 2-D interfaces. We will present our recent results on deformation of such 3-D interfaces and structures, and describe their structural evolution mechanistically through the use of atomistic and mesoscale simulations. |