Effect of thermomechanical treatment on the microstructure, phase composition, and mechanical properties of Al–Cu–Mn–Mg–Zr alloy
- Authors: Zuiko I.S.1, Gazizov M.R.1, Kaibyshev R.O.1
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Affiliations:
- Belgorod National Research University
- Issue: Vol 117, No 9 (2016)
- Pages: 906-919
- Section: Structure, Phase Transformations, and Diffusion
- URL: https://journals.rcsi.science/0031-918X/article/view/166303
- DOI: https://doi.org/10.1134/S0031918X16090088
- ID: 166303
Cite item
Abstract
The effect of the thermomechanical treatment on the microstructure, phase composition, and mechanical properties of heat-treatable AA2519 aluminum alloy (according to the classification of the Aluminum Association) has been considered. After solid-solution treatment, quenching, and artificial aging (T6 treatment) at 180°C for the peak strength, the yield stress, ultimate tensile strength, and elongation to failure are ~300 MPa, 435 MPa, and 21.7%, respectively. It has been shown that treatments that include intermediate plastic deformations with degrees of 7 and 15% (T87 and T815 treatments, respectively) have a significant effect on the phase composition and morphology of strengthening particles precipitated during peak aging T8X type, where X is pre-strain percent, treatments initiate the precipitation of significant amounts of particles of the θ′- and Ω-phases. After T6 treatment, predominantly homogeneously distributed particles of θ″-phase have been observed. Changes in the microstructure and phase composition of the AA2519 alloy, which are caused by intermediate deformation, lead to a significant increase in the yield stress and ultimate tensile strength (by ~40 and ~8%, respectively), whereas the plasticity decreases by 40–50%.
About the authors
I. S. Zuiko
Belgorod National Research University
Author for correspondence.
Email: zuiko_ivan@bsu.edu.ru
Russian Federation, ul. Pobedy 85, Belgorod, 308015
M. R. Gazizov
Belgorod National Research University
Email: zuiko_ivan@bsu.edu.ru
Russian Federation, ul. Pobedy 85, Belgorod, 308015
R. O. Kaibyshev
Belgorod National Research University
Email: zuiko_ivan@bsu.edu.ru
Russian Federation, ul. Pobedy 85, Belgorod, 308015