| Abstract |
| Deformation behavior of nanocrystalline (nc) aluminum ana aluminum alloys, Al93(Fe2Cr1.5Ti1.5) Mn2 and Al93(Fe2Cr1.5Ti1.5)Si2, has been investigated. The specimens are fabricated by hot-extrusion of the nc powders produced by mechanical ball milling. X-ray diffraction and transmission electron microscopy analyses reveal that grain sizes of aluminum and aluminum alloys are around 50 nm and 56 nm, respectively. The nc aluminum shows superior strength around 460 MPa, and Al93(Fe2Cr1.5Ti1.5)Mn2 alloy containing nano-scale particles exhibits 2 times higher strength than that of nc aluminum. Since there is no ability of accumulating dislocations within the nano-scale grains during deformation, the nc aluminum shows negligible work hardening capacity. |
|
|
| Key Words |
| Nanocrystalline metal, Aluminum, Mechanical properties, Deformation behavior |
|
|
 |
|
