Abstract
Tube spinning combined with thermomechanical processing is developed to fabricate thin-walled 2014 aluminum long tubes with high precision tolerance and improved mechanical properties via proper control of the spinning, heat treatment conditions, and material properties as verified by mechanical, stress corrosion, and hydraulic tests. Based on the microstructure investigations using optical, scanning, and transmission electron microscopy, the thermomechanically spun tubes contain distorted grains, strain lines, subgrains formed by tangled dislocations, and finely dispersed CuAl2 (θ″ or θ′) precipitates uniformly distributed in the deformed matrix. The strength, ductility improvement and corrosion resistance accruing from the combination of cold working and precipitation heat treating is a result of a significant dislocation network, refined grains, and uniformly dispersed fine precipitates due to the increased plastic strain.
| Original language | English |
|---|---|
| Pages (from-to) | 135-141 |
| Number of pages | 7 |
| Journal | Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques |
| Volume | 88 |
| Issue number | 2 |
| DOIs | |
| State | Published - 02 1997 |
Keywords
- 2014 aluminum alloy
- Aluminum alloys
- Aluminum corrosion
- Binary alloys
- Copper alloys
- Copper corrosion
- Corrosion resistance
- Corrosion resistant alloys
- Heat resistance
- Heat treatment
- Heat treatment conditions
- High resolution transmission electron microscopy
- High-precision
- Long tubes
- Mechanical stress
- Scanning electron microscopy
- Stress-corrosion
- Thermo-mechanical
- Thermomechanical processing
- Thin walled structures
- Thin-walled
- Tube spinning
- Tubes (components)