Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/87193
Title: The effect of crystallographic orientation on the deformation mechanisms of NiAl nanofilms under tension
Authors: Krylova, Karina A.
Babicheva, Rita I.
Zhou, Kun
Bubenchikov, Alexey M.
Ekomasov, Evgenii G.
Dmitriev, Sergey V.
Keywords: Crystallographic Orientation
Deformation Mechanism
Engineering::Mechanical engineering
Issue Date: 2018
Source: Krylova, K. A., Babicheva, R. I., Zhou, K., Bubenchikov, A. M., Ekomasov, E. G., & Dmitriev, S. V. (2018). The effect of crystallographic orientation on the deformation mechanisms of NiAl nanofilms under tension. Reviews on Advanced Materials Science, 57(1), 26-34. doi:10.1515/rams-2018-0044
Series/Report no.: Reviews on Advanced Materials Science
Abstract: Molecular dynamics is applied to study the effect of crystallographic orientation on the plastic deformation mechanisms and mechanical properties of NiAl intermetallic nanofilms subjected to uniaxial tension. It is observed that the deformation mechanisms qualitatively depend on the crystallographic orientation of the nanofilms with respect to the loading direction. Plastic deformation of the nanofilms along [557] crystallographic direction is associated with the edge dislocation sliding in the slip system [001](110). As for the nanofilms stretched along [554] and [111] directions, their deformation occurs first through the dislocation sliding followed by the formation of (112)[11 1] twins. Uniaxial tension of the nanofilms along [559] and [55 11] leads to the nucleation and growth of a martensitic phase followed by their rupture along an interface. The maximum (minimum) strength of 9.9 (7.0) GPa is observed for the nanofilms stretched along the [559] ([554]) crystallographic direction, while the largest (smallest) strain to failure of 27 (15)% is for [559] ([55 11]). Various deformation mechanisms of the nanofilms are explained through computing the Schmid factor for the operational slip system. The results indicate that the crystallographic orientation is among the key parameters controlling the deformation mechanisms and mechanical properties of intermetallic nanofilms.
URI: https://hdl.handle.net/10356/87193
http://hdl.handle.net/10220/49877
ISSN: 1606-5131
DOI: 10.1515/rams-2018-0044
Rights: © 2019 Karina A. Krylova, et al., published by Sciendo. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. CC BY-NC-ND 4.0
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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