Interface-Driven Plasticity: The Presence of an Interface Affected Zone in Metallic Lamellar Composites: The Presence of an Interface Affected Zone…
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos NM 87545 USA
- Theoretical Division, Los Alamos National Laboratory, Los Alamos NM 87545 USA
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos NM 87545 USA; Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos NM 87545 USA
Large strain deformation is used to make fine nanolayered two-phase composites from stacks of conventional polycrystalline sheets. The final materials made by this technique possess a crystallographically highly oriented structure containing nearly atomically perfect interfaces prevailing ubiquitously throughout the material. How this ordered structure evolves with strain from the coarser, more disordered state is not known. Here, using microstructural analysis and computational modeling, we discover a local interface-affected zone (IAZ) possessing the same crystallographically sharp structure in coarse layered composites as the final nanolayered composites. This means that this strongly oriented interface “zone” survives the mechanical work and overtakes the structure as it refines to the nanoscale. In essence, through the formation of this interface zone, the crossover to a highly oriented nanostructure occurs. Using microstructural analysis and crystal plasticity simulations, we show that the IAZ is a consequence of slip accommodation at the interface. This insight is valuable for developing processing strategies for superior interface-dominated materials.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Materials at Irradiation and Mechanical Extremes (CMIME)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- 2008LANL1026
- OSTI ID:
- 1369958
- Journal Information:
- Advanced Engineering Materials, Vol. 17, Issue 1; Related Information: CMIME partners with Los Alamos National Laboratory (lead); Carnegie Mellon University; University of Illinois, Urbana Champaign; Massachusetts Institute of Technology; University of Nebraska; ISSN 1438-1656
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
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