The Effect of Termomechanical Treatment
on the Low-Cyclic Fatigue Behavior in an Al–Cu–Mg–Ag Alloy

M. R. Gazizov; Газизов М. Р.; M. Yu. Gazizova; Газизова М. Ю.; I. S. Zuiko; Зуйко И. С.; R. O. Kaibyshev; Кайбышев Р. О.

doi:10.31857/S001532302360034X

The Effect of Termomechanical Treatment on the Low-Cyclic Fatigue Behavior in an Al–Cu–Mg–Ag Alloy

Authors: Gazizov M.R.¹, Gazizova M.Y.¹, Zuiko I.S.¹, Kaibyshev R.O.¹
Affiliations:
1. Belgorod State National Research University (NRU “BelSU”)
Issue: Vol 124, No 5 (2023)
Pages: 434-442
Section: ПРОЧНОСТЬ И ПЛАСТИЧНОСТЬ
URL: https://journal-vniispk.ru/0015-3230/article/view/139465
DOI: https://doi.org/10.31857/S001532302360034X
EDN: https://elibrary.ru/OLOZMQ
ID: 139465

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Abstract
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Abstract

The mechanical behavior under monotonic and cyclic loadings has been studied in an Al–4.5Cu–0.56Mg–0.77Ag–0.42Mn–0.12Ti–0.05V–0.02Fe (wt %) alloy subjected to thermomechanical treatment (TMT), including a solution heat treatment, quenching in water, uniaxial tension with a plastic strain of 3%, and
peak aging at 190°C (state T83 according to the classification of the Aluminum Association). The T83-ed alloy demonstrates the lowest tensile strength properties in comparison with T6 state (traditional aging) and TMT,
including rolling with a 40%-reduction (T840). Compared to T6 and T840 states, the lowest cyclic strength and cyclic strain hardening coefficients in the Ramberg-Osgood relationship was found to be in T83-ed alloy. To achieve long fatigue life, it is advisable to reduce to the minimum values the degree of intermediate plastic deformation required for straightening Al–Cu–Mg–Ag sheets after their buckling during high-temperature heating for quenching.

Keywords

Al-Cu-Mg-Ag alloy, thermomechanical treatment, microstructure, mechanical properties, fatigue

References

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