Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 556, Issue -, Pages 801-806Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.07.070
Keywords
Dissolution; Second phase; Aluminium alloy; MAC; GP zone
Categories
Funding
- Natural Science Foundation of China [51171209]
- National Key Fundamental Research Project of China [012CB619506]
Ask authors/readers for more resources
The microstructure and Vickers hardness behavior of Al-4 wt.% Cu alloy bearing theta '' precipitates processed by multi-axial compression (MAC) and subsequent nature aging treatment has been studied. theta '' precipitates are almost completely dissolved after four passes (epsilon = 1.6) of MAC at room temperature, and a non-equilibrium supersaturated solid solution with a fine grain size of approximately 250 nm is obtained. A slight increase of the hardness occurs during the subsequent nature aging due to the formation of G.P. zones. This is attributed to a large number of vacancies formed during MA compressing, which is sufficient for substantial mass transfer of Cu atom and act as nucleation sites of G.P. zones. Meanwhile, vacancy flux and pipe diffusion of dislocation could greatly enhance the diffusivity and cause a much faster precipitation kinetics compared with the undeformed sample. (c) 2012 Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available