Dear friends,

I want to share our recent research work on NiAl nanowire, which is published in Nanotechnology, IOP publishing. The abstract of the paper is given below. Further details can be found at "Vijay Kumar Sutrakar et al 2009 Nanotechnology 20 295705 (9pp) doi: 10.1088/0957-4484/20/29/295705"

Abstract.
Extensive molecular dynamics (MD) simulations have been performed in a B2-NiAl
nanowire using an embedded atom method (EAM) potential. We show a stress induced
-centered-tetragonal (BCT) phase transformation and a novel temperature and cross-section dependent
pseudo-elastic/pseudo-plastic recovery from such an unstable BCT phase with a recoverable strain
of ~30%
as compared to 5–8% in polycrystalline materials. Such a temperature and cross-section
dependent pseudo-elastic/pseudo-plastic strain recovery can be useful in various
interesting applications of shape memory and strain sensing in nanoscale devices.
Effects of size, temperature, and strain rate on the structural and mechanical
properties have also been analyzed in detail. For a given size of the nanowire
the yield stress of both the B2 and the BCT phases is found to decrease with
increasing temperature, whereas for a given temperature and strain rate the yield
stress of both the B2 and the BCT phase is found to increase with increase in
the cross-sectional dimensions of the nanowire. A constant elastic modulus of
~80 GPa of the B2 phase is observed in the temperature range of 200–500 K for nanowires of
cross-sectional dimensions in the range of 17.22–28.712 Å, whereas the elastic modulus of
the BCT phase shows a decreasing trend with an increase in the temperature.