Abstract
A nanostructured surface layer was fabricated on 1420 aluminum alloy by high-energy shot peening. Microstructures were characterized by X-ray diffractometer (XRD), transmission electron microscope (TEM) and high-resolution electron microscope (HRTEM), and microhardness measurement was conducted along the depth from top surface layer to matrix of the sample peened for 30 min. The results show that a nanocrystalline layer about 20 μm in thickness is formed on the surface of the sample after high-energy shot peening, in which the grain size is changed from about 20 nm to 100 nm. In the surface layer of 20-50 μm in depth, the microstructure consists of sub-micron grains. The surface nanocrystallization is accomplished by dislocation slip. The microhardness of the top surface nanostructured layer is enhanced obviously after high-energy shot peening (HESP) compared with that of the coarse-grained matrix.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 615-618 |
| Number of pages | 4 |
| Journal | Transactions of Nonferrous Metals Society of China (English Edition) |
| Volume | 15 |
| Issue number | 3 |
| State | Published - Jun 1 2005 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Geotechnical Engineering and Engineering Geology
- Metals and Alloys
- Materials Chemistry