Dynamics of a Lüders Band and Destruction of an Aluminum-Magnesium Alloy, Initiated by a Stress Concentrator

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 wit...

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Bibliographic Details
Published inPhysics of the solid state Vol. 60; no. 2; pp. 320 - 327
Main Authors Shibkov, A. A., Zheltov, M. A., Gasanov, M. F., Zolotov, A. E.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.02.2018
Springer
Springer Nature B.V
Subjects
ALUMINIUM ALLOYS
Aluminum
Aluminum base alloys
Aluminum casting alloys
Concentrators
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRACKS
DEFORMATION
Destruction
Luders lines
MAGNESIUM
MAGNESIUM ALLOYS
Magnesium base alloys
MATERIALS SCIENCE
Mechanical Properties
Musical groups
Physics
Physics and Astronomy
Physics of Strength
Plastic deformation
PLASTICITY
Solid State Physics
Specialty metals industry
STRESSES
VELOCITY
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Summary: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.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783418020257