Multilevel Simulation of the Loss of High-Temperature Properties of Heat-Resistant Intermetallics

The macrolocalization and instability of plastic deformation, which lead to the loss of high-strength properties and fracture of high-temperature intermetallics with the L 1 2 superstructure at high deformation temperatures, are studied by mathematical simulation methods. A numerical experiment is c...

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Bibliographic Details
Published in:Russian metallurgy Metally 2021-10, Vol.2021 (10), p.1188-1195
Main Authors: Lipatnikova, Ya. D., Solov’eva, Yu. V., Starenchenko, V. A., Belov, N. N., Valuiskaya, L. A.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Compressive strength
Dimensional changes
Formability
High temperature
Intermetallic compounds
Materials Science
Mathematical analysis
Mathematical models
Metallic Materials
Numerical methods
Physical Foundations of Strength and Plasticity
Plastic deformation
Superstructures
Three dimensional models
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Summary:The macrolocalization and instability of plastic deformation, which lead to the loss of high-strength properties and fracture of high-temperature intermetallics with the L 1 2 superstructure at high deformation temperatures, are studied by mathematical simulation methods. A numerical experiment is carried out using a three-dimensional plastic deformation model, which is based on a synthesis of the mathematical models of dislocation kinetics and deformable body mechanics. A condition is formulated for the loss of stability resulting in the formation of superlocalization bands during compression. The influence of loading conditions, the strength properties of a deformable medium element, a change in the cross-sectional area of the sample, and stress concentrators on the formation of superlocalization bands is studied. As a result of calculations, three-dimensional pictures of changing the shape of deformed samples and the strain intensity distribution in their volumes are obtained.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029521100190