Open AccessДинамика полосы Людерса и разрушение алюминий-магниевого сплава, инициированные концентратором напряжений
Author(s) -
А.А. Шибков,
М.А. Желтов,
М.Ф. Гасанов,
А.Е. Золотов
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.02.45386.158
Subject(s) - deformation bands , deformation (meteorology) , concentrator , materials science , intersection (aeronautics) , stress (linguistics) , composite material , stress concentration , alloy , geometry , optics , fracture mechanics , physics , engineering , mathematics , linguistics , microstructure , philosophy , aerospace engineering
patio-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.