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Amit Misra1

1, University of Michigan–Ann Arbor, Ann Arbor, Michigan, United States

This presentation will review the recent progress in the understanding of plastic deformation and fracture in metallic materials that have hierarchical composite structures across nano-to-micro length scales. Examples will be presented from different model systems such as laser-processed Al-Al2Cu-Si eutectics, and vapor deposited Cu-Mo thin films. The role of in situstraining experiments in TEM and SEM, and integration with atomistic modeling, dislocation theory and crystal plasticity in understanding mechanical behavior will be emphasized. The common aspects in interface-dominated mechanical behavior in hierarchical metallic composites such as unusually high flow strengths, high strain hardening rates, plastic co-deformability and suppression of shear bands will be highlighted.

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