Deformation of nanocrystalline binary aluminum alloys with segregation of Mg, Co and Ti at grain boundaries

Deformation of nanocrystalline binary aluminum alloys with segregation of Mg, Co and Ti at grain boundaries

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...

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Bibliographic Details
Published in:Physics of metals and metallography Vol. 118; no. 1; pp. 65 - 74
Main Authors: Zinovev, A. V., Bapanina, M. G., Babicheva, R. I., Enikeev, N. A., Dmitriev, S. V., Zhou, K.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 2017
Springer
Springer Nature B.V
Subjects:
Aluminum
Aluminum (Metal)
Aluminum alloys
Aluminum base alloys
Bicrystals
Binary alloys
Chemistry and Materials Science
Deformation
Grain boundaries
Materials Science
Metallic Materials
Molecular dynamics
Segregations
Specialty metals industry
Strength and Plasticity
Titanium
molecular dynamics
segregation
grain-boundary migration
aluminum alloys
grain-boundary sliding
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Summary: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.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X16110144