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Title: Effect of annealing on structure and mechanical behavior of an AA2139 alloy
Authors: Tagirov, D.
Zhemchuzhnikova, D.
Gazizov, M.
Kaibyshev, R.
Keywords: technique
metal science
aluminum alloys
high temperature deformation
mechanical properties
Issue Date: 2014
Citation: Effect of annealing on structure and mechanical behavior of an AA2139 alloy / D. Tagirov [et al.] // Materials Science Forum. - 2014. - Vol.783-786.-P. 258-263.
Abstract: An AA2139 alloy with a chemical composition of Al-4.35Cu-0.46%Mg-0.63Ag-0.36Mn-0.12Ti (in wt.%) and an initial grain size of about 155 μm was subjected to annealing at 430°C for 3 h followed by furnace cooling. This treatment resulted in the formation of a dispersion of coarse particles having essentially plate-like shape. The over-aged alloy exhibits lower flow stress and high ductility in comparison with initial material in the temperature interval 20-450°C. Examination of microstructural evolution during high-temperature deformation showed localization of plastic flow in vicinity of coarse particles. Over-aging leads to transition from ductile-brittle fracture to ductile and very homogeneous ductile fracture at room temperature
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