Atomistic simulation of shape memory effect (SME) and superelasticity (SE) in nano-porous NiTi shape memory alloy (SMA)
AffiliationUniv Arizona, Civil Engn & Engn Mech
Univ Arizona, Mat Sci & Engn
Shape memory effect
NiTi shape memory alloy
MetadataShow full item record
PublisherELSEVIER SCIENCE BV
CitationGur, S., Frantziskonis, G. N., & Muralidharan, K. (2018). Atomistic simulation of shape memory effect (SME) and superelasticity (SE) in nano-porous NiTi shape memory alloy (SMA). Computational Materials Science, 152, 28-37. https://doi.org/10.1016/j.commatsci.2018.05.031
JournalCOMPUTATIONAL MATERIALS SCIENCE
Rights© 2018 Elsevier B.V. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractPorosity can play an important role in altering the phase transformation characteristics of NiTi shape memory alloys (SMA), thus changing its shape memory as well as its superelasticity properties. This work, based on atomistic simulations of binary NiTi SMA, documents the effects of porosity at the nanometer length scale on phase fraction evolution kinetics, transformation temperatures, and stress-strain response. Classical molecular dynamics simulations are performed using a well-examined and verified Finnis-Sinclair type embedded-atom method interatomic potential. Simulation results for the nano-porous NiTi with various porosity configurations are compared to non-porous NiTi. The martensite phase fraction and transformation temperatures increase noticeably with increasing porosity, and the stress-strain response shows noticeable variation with porosity. The residual strain and hysteretic energy dissipation capacity increase significantly with increasing porosity.
Note24 month embargo; published online: 25 May 2018
VersionFinal accepted manuscript
SponsorsUniversity of Arizona