TY - GEN
T1 - Two-way shape memory surfaces
AU - Zhang, Yijun
AU - Cheng, Yang Tse
AU - Grummon, David S.
PY - 2006
Y1 - 2006
N2 - Recently, we discovered that a two-way shape memory effect can be realized on NiTi shape memory alloy surfaces by spherical indentation. Either thermomechanical cycling or slip-plastic deformation under contact loading conditions is effective in inducing reversible indent depth changes: deeper indents in the low temperature martensitic phase and shallower indents in the high temperature austenitic phase [1,2]. By planarization of these spherical indents to restore a flat surface, circular reversible surface protrusions appear upon heating and disappear upon cooling. Nano-protrusions are also realized in sputter deposited NiTi thin films. Furthermore, two-way reversible line protrusions are made by planarizing scratch tracks on a NiTi shape memory alloy. Shape memory surfaces can be exploited for a wide range of potential applications, including information storage, optical devices, and smart tribological surfaces.
AB - Recently, we discovered that a two-way shape memory effect can be realized on NiTi shape memory alloy surfaces by spherical indentation. Either thermomechanical cycling or slip-plastic deformation under contact loading conditions is effective in inducing reversible indent depth changes: deeper indents in the low temperature martensitic phase and shallower indents in the high temperature austenitic phase [1,2]. By planarization of these spherical indents to restore a flat surface, circular reversible surface protrusions appear upon heating and disappear upon cooling. Nano-protrusions are also realized in sputter deposited NiTi thin films. Furthermore, two-way reversible line protrusions are made by planarizing scratch tracks on a NiTi shape memory alloy. Shape memory surfaces can be exploited for a wide range of potential applications, including information storage, optical devices, and smart tribological surfaces.
UR - http://www.scopus.com/inward/record.url?scp=41549134114&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=41549134114&partnerID=8YFLogxK
U2 - 10.1557/proc-979-0979-hh05-03
DO - 10.1557/proc-979-0979-hh05-03
M3 - Conference contribution
AN - SCOPUS:41549134114
SN - 9781604234282
T3 - Materials Research Society Symposium Proceedings
SP - 7
EP - 11
BT - Thermodynamics and Kinetics of Phase Transformations in Inorganic Materials
T2 - 2006 MRS Fall Meeting
Y2 - 27 November 2006 through 1 December 2006
ER -