Influence of grain size on the mechanism of fracture of the aluminum alloy V95 |
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| Authors: | A. N. Petrova I. G. Brodova I. G. Shirinkina E. A. Lyapunova O. B. Naimark |
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| Affiliation: | 1. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Ekaterinburg, 620990, Russia
2. Institute of Continuos Media Mechanics, Ural Branch, Russian Academy of Sciences, ul. Akademika Koroleva, 1, Perm, 614013, Russia
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| Abstract: | Mechanical behavior and mechanisms of fracture of the ultrafine-crystalline (UFC) and the coarse-crystalline (CC) aluminum alloy V95 (Al-6.0 Zn-2.3 Mg-2.0 Cu-0.4 Mn (wt %)) manufactured via using severe plastic deformation, namely, by dynamic equal-channel angular pressing (DCAP), have been studied. It has been demonstrated that the UFC material exhibits improved mechanical properties in comparison with the CC analog. A correlation analysis of fracture surfaces and the determination of the Hurst exponent have made it possible to perform a comparative estimation of the uniformity of the fracture structure and of the fractions of ductile and brittle fractures in the samples with the structure-scale characteristics different in value. |
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