Twinning to slip transition in ultrathin BCC Fe nanowires

We report twinning to slip transition with decreasing size and increasing temperature in ultrathin BCC Fe nanowires. Molecular dynamics simulations have been performed on different nanowire size in the range 0.404–3.634 nm at temperatures ranging from 10 to 900 K. The results indicate that slip mode...

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Bibliographic Details
Published in:Physics letters. A 2018-04, Vol.382 (15), p.1047-1051
Main Authors: Sainath, G., Choudhary, B.K.
Format: Article
Language:English
Subjects:
BCC Fe nanowire
Dislocation slip
Molecular dynamics simulations
Size effects
Twinning
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Summary:We report twinning to slip transition with decreasing size and increasing temperature in ultrathin BCC Fe nanowires. Molecular dynamics simulations have been performed on different nanowire size in the range 0.404–3.634 nm at temperatures ranging from 10 to 900 K. The results indicate that slip mode dominates at low sizes and high temperatures, while deformation twinning is promoted at high sizes and low temperatures. The temperature, at which the nanowires show twinning to slip transition, increases with increasing size. The different modes of deformation are also reflected appropriately in the respective stress–strain behaviour of the nanowires. •We investigate the deformation behaviour of ultrathin BCC Fe nanowires.•Slip dominates at low sizes and high temperature.•Twinning is preferred at low temperatures and high sizes.•The temperature for twinning to slip transition increases with increasing size.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2018.02.007