Anomalous Strain Rate Sensitivity of Flow Stress in Ni3Ge Single Crystals. The role of Point Defects

The paper considers the strain rate sensitivity of flow stress in Ni 3 Ge single crystals having high-energy antiphase boundaries detected in experiments for the strain rate variation. The concentration of point defects is estimated by the model of plastic deformation of alloys having L1 2 structure...

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Bibliographic Details
Published in:Russian physics journal 2017-07, Vol.60 (3), p.494-501
Main Authors: Solov’eva, Yu. V., Starenchenko, V. A., Pantyukhova, O. D., Starenchenko, S. V., Solov’ev, A. N., Gettinger, M. V.
Format: Article
Language:English
Subjects:
Alloys
Analysis
Antiphase boundaries
Condensed Matter Physics
Condensed-State Physics
Crystal defects
Deformation
Deformation mechanisms
Dislocations
Hadrons
Heavy Ions
Intermetallic compounds
L1-2 structure (crystals)
Lasers
Mathematical and Computational Physics
Migration
Nuclear Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Plastic deformation
Point defects
Single crystals
Strain rate
Strain rate sensitivity
Stress concentration
Theoretical
Yield strength
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Summary:The paper considers the strain rate sensitivity of flow stress in Ni 3 Ge single crystals having high-energy antiphase boundaries detected in experiments for the strain rate variation. The concentration of point defects is estimated by the model of plastic deformation of alloys having L1 2 structure. These point defects generated by plastic deformation, annihilate both mutually and on dislocations. It is shown that at higher temperatures of deformation, the anomalous strain rate sensitivity of the flow stress observed during the strain rate variation, can be caused by the migration of and interaction between the point defects and dislocations.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-017-1099-2