Thermomechanical Tube Spinning of AA 2014 aluminum Alloy

摘要

Tube spinning combined with thermomechanical process- ing is developed to fabricate thin-walled 2014 aluminum long tubes with high precision tolerance and improved me- chanical properties via proper control of the spinning, heat treatment condition, 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 thermomechani- cally spun tubes contain distorted grains, strain lines, sub- grains formed by tangled dislocations, and finely dispersed CuAl_2 (θ" or θ') precipitates uniformly distributed in the Deformed matrix.