About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XII)
|
Presentation Title |
Control of Layer Instabilities during ARB Processing of Iron-based FCC/BCC Metallic Laminates |
Author(s) |
Thomas J. Nizolek, Rodney J. McCabe, Cody Miller, Yifan Zhang, Nan Li, Daniel R. Coughlin, John S. Carpenter |
On-Site Speaker (Planned) |
Thomas J. Nizolek |
Abstract Scope |
Accumulative roll bonding (ARB) is a severe plastic deformation technique capable of producing bimetallic laminates with layer thicknesses ranging from the millimeter scale to the sub-micron scale. However, in order to enable refinement of the layered structure to the nanoscale, it is necessary to preserve layer continuity and the associated constraints on co-deformation during processing. Here we show that ARB processed iron-copper, iron-silver, and iron-aluminum laminates all exhibit layer length scale instabilities, including necking and shear banding, at ARB processing strains between 2.2 and 4.5. The effects of ARB process modifications, including intermediate annealing steps, on the microstructure, phase-resolved mechanical properties as determined through nanoindentation, and flow stability of these laminates will be discussed. Ultimately, for the iron-copper and iron-silver systems, ARB synthesis routes are obtained that preserve layer continuity by minimizing constituent phase flow-stress mismatch, allowing material with sub-100 nanometers layer thicknesses to be produced. |
Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Nanotechnology, Mechanical Properties |