Journal
VACUUM
Volume 171, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2019.108944
Keywords
7055 aluminum alloy; Precipitate phase; Heat treatment; Microstructure
Funding
- National Natural Science Foundation of China [51705270]
- Natural Science Foundation of Shandong Province [ZR2016EEP03]
- Technology Project of Higher Education Shandong Province Science [J17KA0031]
Ask authors/readers for more resources
7055 aluminum alloy is a typical age-hardening alloy whose properties change with microstructural evolution as a result of heat treatment. In this paper, the microstructural evolution of the alloy after solid solution treatment and manual aging is examined using SEM and TEM. Results show that, as aging proceeds, the precipitation phase gradually enlarges and thickens following the precipitation sequence of supersaturated solid solution (SSSS) -> GPI zone -> GPII zone -> eta '' phase -> eta phase; some n phases formed during aging, which have two different nucleation mechanisms: homogeneous nucleation and heterogeneous nucleation, the S phases of the latter being marginally larger in size than those of the former. There is a transition in the transformation of (A13Cu) in GPII zone into eta'-phase.
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