Abstract
Copper disks containing columns of aligned nanotwins were subjected to high-pressure torsion (HPT) involving a half turn under a 3 GPa compressive stress. The overall shear strain of 21 at 1 mm from the center of rotation is concentrated at the surfaces, where the columns of twins have been transformed into a 3-D grain structure to a depth of about 5 μm. The remaining columns of twins were sheared in the direction of the shear stress with little rotation of the twin boundaries.
Original language | English (US) |
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Pages (from-to) | 899-902 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 65 |
Issue number | 10 |
DOIs | |
State | Published - Nov 2011 |
Funding
The authors thank W.W. Jian for carrying out the HPT deformation. This work made use of shared facilities supported by the MRSEC Program of the National Science Foundation ( DMR-020513 ) at the Materials Research Center of Northwestern University.
Keywords
- Copper
- Deformation structures
- High-pressure torsion
- Nanotwins
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys