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- Title
High-rate deformation of nanocrystalline iron and copper.
- Authors
Sinani, A.; Shpeizman, V.; Vlasov, A.; Zil'berbrand, E.; Kozachuk, A.
- Abstract
Stress-strain curves are recorded during a high-speed impact and slow loading for nanocrystalline and coarse-grained iron and copper. The strain-rate sensitivity is determined as a function of the grain size and the strain. It is shown that the well-known difference between the variations of the strain-rate sensitivity of the yield strength with the grain size in fcc and bcc metals can be extended to other strain dependences: the strain-rate sensitivity of flow stresses in iron decreases with increasing strain, and that in copper increases. This difference also manifests itself in different slopes of the dependence of the strain-rate sensitivity on the grain size when the strain changes.
- Subjects
DEFORMATIONS (Mechanics); NANOCRYSTALS; STRAINS &; stresses (Mechanics); GRAIN size; MECHANICAL engineering
- Publication
Technical Physics, 2016, Vol 61, Issue 11, p1674
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784216110244