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The effects of macrolocalization of deformation in Al‐based composites with Al 2 O 3 inclusions
Author(s) -
DERYUGIN YE. YE.,
PANIN V. E.,
SCHMAUDER S.,
SOPPA E.
Publication year - 2003
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.2003.00641.x
Subject(s) - materials science , tempering , composite material , annealing (glass) , deformation (meteorology) , tension (geology) , composite number , compression (physics)
Using a television optical TOMSC system, regular features of localization of macroplastic deformation are studied in composite aluminum‐based materials with hard inclusions of Al 2 O 3 under tension. Before investigation, the specimens are subjected to cold rolling, tempering for 30 min at 500 °C with subsequent cooling in air, and annealing at 550 °C during 2 h with subsequent cooling in furnace. It is shown that the tempered and annealed alloys exhibit mobile centers of active macrolocalization long before the formation of a stationary neck preceding material fracture. Physical mesomechanics, relying on the concepts of the leading role of different‐scale stress concentrators that relax and develop in a loaded heterogeneous material, is capable of providing a qualitative description of macrolocalization development.