This article is cited in 6 papers

Mechanical properties, strength physics and plasticity

Dynamics of a Lüders band and destruction of an aluminum-magnesium alloy, initiated by a stress concentrator

A. A. Shibkov, M. A. Zheltov, M. F. Gasanov, A. E. Zolotov

Tambov State University named after G.R. Derzhavin

Abstract: Spatio-temporal localization of deformation and the rupture of the aluminum-magnesium AlMg6 alloy, initiated by a geometrical stress concentrator, are studied in situ by video recording at a speed of 500 to 20000 frames/s. It is established that a stress concentrator in the form of a small notch with a depth about 1% of the width of a flat specimen is an attractor of bands of macrolocalized plastic deformation, starting from a Lüders band and ending with the start of the main crack. The key role of intersecting deformation macrobands in the development of the main crack is revealed. Possible micromechanisms of viscous destruction associated with the dynamics of the intersection of deformation bands are discussed.

Received: 16.05.2017
Revised: 05.07.2017

DOI: 10.21883/FTT.2018.02.45386.158

 English version: Physics of the Solid State, 2018, 60:2, 320–327

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