Crack Resistance of an Alloy of the Al – Cu – Mg – Ag System


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Abstract

Cyclic crack resistance of an aluminum alloy of the Al – Cu – Mg – Ag system with a high content of doping elements is studied. It is shown that the alloy possesses a high threshold value of the stress intensity factor for nucleation of fatigue cracks. However, the nonuniform distribution of second-phase particles in the material reduces the crack resistance. Special features and main differences of the relief of fatigue fracture surfaces of the alloy in various regions of the kinetic diagram are considered. Coefficients of the Paris’ equation for the region of linear fatigue-crack growth are determined.

About the authors

D. A. Zhemchuzhnikova

Belgorod State University

Author for correspondence.
Email: zhemchuzhnikova@bsu.edu.ru
Russian Federation, Belgorod

M. R. Gazizov

Belgorod State University

Email: zhemchuzhnikova@bsu.edu.ru
Russian Federation, Belgorod

R. O. Kaibyshev

Belgorod State University

Email: zhemchuzhnikova@bsu.edu.ru
Russian Federation, Belgorod

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