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|Title:||The effect of crystallographic orientation on the deformation mechanisms of NiAl nanofilms under tension||Authors:||Krylova, Karina A.
Babicheva, Rita I.
Bubenchikov, Alexey M.
Ekomasov, Evgenii G.
Dmitriev, Sergey V.
|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  crystallographic direction is associated with the edge dislocation sliding in the slip system (110). As for the nanofilms stretched along  and  directions, their deformation occurs first through the dislocation sliding followed by the formation of (112)[11 1] twins. Uniaxial tension of the nanofilms along  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  () crystallographic direction, while the largest (smallest) strain to failure of 27 (15)% is for  ([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
|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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