High-rate deformation of nanocrystalline iron and copper
- Authors: Sinani A.B.1, Shpeizman V.V.1, Vlasov A.S.1, Zil’berbrand E.L.1, Kozachuk A.I.1
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Affiliations:
- Ioffe Physical-Technical Institute
- Issue: Vol 61, No 11 (2016)
- Pages: 1674-1678
- Section: Solid State
- URL: https://journals.rcsi.science/1063-7842/article/view/198439
- DOI: https://doi.org/10.1134/S1063784216110244
- ID: 198439
Cite item
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.
About the authors
A. B. Sinani
Ioffe Physical-Technical Institute
Email: shpeizm.v@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021
V. V. Shpeizman
Ioffe Physical-Technical Institute
Author for correspondence.
Email: shpeizm.v@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021
A. S. Vlasov
Ioffe Physical-Technical Institute
Email: shpeizm.v@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021
E. L. Zil’berbrand
Ioffe Physical-Technical Institute
Email: shpeizm.v@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021
A. I. Kozachuk
Ioffe Physical-Technical Institute
Email: shpeizm.v@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021