|About this Abstract
||MS&T23: Materials Science & Technology
||Interface-mediated Phenomena in Structural Materials
||3D Interface-enabled High Strength and Deformability in Cu/Nb Nanolaminates
||Justin Y. Cheng, Shuozhi Xu, Eric Hintsala, Jon K. Baldwin, Youxing Chen, Nicolas Fuchs-Lynch, Mauricio De Leo, Irene J. Beyerlein, Nathan A. Mara
|On-Site Speaker (Planned)
||Justin Y. Cheng
We explore the effect of 3D interfaces containing chemical, crystallographic, and structural nanoscale heterogeneities in all spatial dimensions on mechanical behavior and deformation mechanisms in Cu/Nb nanolaminates. In situ SEM/TEM pillar compression shows that 3D interfaces enable higher strength and increased deformability in 3D interface Cu/Nb (3D Cu/Nb) as compared to Cu/Nb with flat interfaces under multiple loading orientations. We experimentally demonstrate that an optimal combination of layer and 3D interface thickness maximizes strength (2500 MPa flow stress) and deformability (16% uniform plastic strain) in agreement with mesoscale simulation. This work establishes processing-microstructure-property relationships for 3D Cu/Nb that reveal design parameters for tailoring the mechanical behavior of nanostructured alloy through control of interface structure.