Deformation of nanocrystalline binary aluminum alloys with segregation of Mg, Co and Ti at grain boundaries
- Authors: Zinovev A.V.1,2,3, Bapanina M.G.1, Babicheva R.I.1,4, Enikeev N.A.5, Dmitriev S.V.1,6, Zhou K.4
-
Affiliations:
- Institute for Metals Superplasticity Problems
- Institute of Nuclear Materials Science
- Université Catholique de Louvain
- School of Mechanical and Aerospace Engineering
- Institute of Physics of Advanced Materials
- Scientific Research Laboratory Mechanics of New Nanomaterials
- Issue: Vol 118, No 1 (2017)
- Pages: 65-74
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/166838
- DOI: https://doi.org/10.1134/S0031918X16110144
- ID: 166838
Cite item
Abstract
The influence of the temperature and sort of alloying element on the deformation of the nanocrystalline (NC) binary Al alloys with segregation of 10.2 at % Ti, Co, or Mg over grain boundaries has been studied using the molecular dynamics. The deformation behavior of the materials has been studied in detail by the simulation of the shear deformation of various Al bicrystals with the grain-boundary segregation of impurity atoms, namely, Ti, Co, or Mg. The deformation of bicrystals with different grain orientation has been studied. It has been found that Co introduction into grain boundaries of NC Al has a strengthening effect due to the deceleration of the grain-boundary migration (GBM) and difficulty in the grain-boundary sliding (GBS). The Mg segregation at the boundaries greatly impedes the GBM, but stimulates the development of the GBS. In the NC alloy of Al–Ti, the GBM occurs actively, and the flow-stress values are close to the values characteristic of pure Al.
About the authors
A. V. Zinovev
Institute for Metals Superplasticity Problems; Institute of Nuclear Materials Science; Université Catholique de Louvain
Author for correspondence.
Email: zinovyev.alex.v@gmail.com
Russian Federation, ul. S. Khalturina 39, Ufa, 450001; Boeretang 200, Mol, B-2400; Av. Georges Lemaître, 4, Louvain-la-Neuve, B-1348
M. G. Bapanina
Institute for Metals Superplasticity Problems
Email: zinovyev.alex.v@gmail.com
Russian Federation, ul. S. Khalturina 39, Ufa, 450001
R. I. Babicheva
Institute for Metals Superplasticity Problems; School of Mechanical and Aerospace Engineering
Email: zinovyev.alex.v@gmail.com
Russian Federation, ul. S. Khalturina 39, Ufa, 450001; Nanyang Avenue, 50, Singapore, 639798
N. A. Enikeev
Institute of Physics of Advanced Materials
Email: zinovyev.alex.v@gmail.com
Russian Federation, ul. Karla Marksa 12, Ufa, 450008
S. V. Dmitriev
Institute for Metals Superplasticity Problems; Scientific Research Laboratory Mechanics of New Nanomaterials
Email: zinovyev.alex.v@gmail.com
Russian Federation, ul. S. Khalturina 39, Ufa, 450001; ul. Polytechnicheskaya 29, St. Petersburg, 195251
K. Zhou
School of Mechanical and Aerospace Engineering
Email: zinovyev.alex.v@gmail.com
Singapore, Nanyang Avenue, 50, Singapore, 639798