Optimization of artificial aging of forged and rolled semi-finished products from heat-resistant aluminum alloy AK4-1h.

Selivanov A.A., Antipov K.V., Astashkin A.I., Ovsyannikov B.V.
UDC
699.715:621.785.784
DOI
10.18577/2307-6046-2018-0-4-9-19
Article PDF (Russian) (923.81 KB)
How to cite
Selivanov A.A., Antipov K.V., Astashkin A.I., Ovsyannikov B.V. Optimization of artificial aging of forged and rolled semi-finished products from heat-resistant aluminum alloy AK4-1h. // Proceedings of VIAM. 2018. No. 4. DOI: 10.18577/2307-6046-2018-0-4-9-19. URL: https://test.viam.ru/en/journal/2018/4/2
Keywords
aluminum deformable alloys, heat-resistant deformable alloys of the Al–Cu–Mg system, forgings, rolled plates, aging kinetics, mechanical properties, fracture toughness, fatigue resistance.
Abstract

The article presents the results of the study of the effect of aging regimes on the mechanical and corrosion properties of semi-finished products from AK4-1 alloy - rolled plates from 12 to 60 mm thick and forgings 135 and 225 mm thick. The temperature of artificial aging was varied in the range 190–200C, the holding time varied from 5 hours to 22 hours. It was found that with an increase in the holding time from 5 to 18 hours at a temperature of 190 and 200°C, the temporary resistance and the yield strength of the plates is reduced by 10–30 MPa, and in the interval of exposures of 14–18 hours the relative elongation of the plates decreases, especially in the altitude direction . The influence of the temperature-time parameters of aging on the propensity of plates to delaminating and intergranular corrosion in the investigated interval of aging regimes has not been revealed. The study of forgings from the AK4-1h alloy aged at 190 and at 200°C showed that the temporary resistance (

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