Combinatorial search of thermoelastic shape-memory alloys with extremely small hysteresis width.
Reversibility of structural phase transformations has profound technological implications in a wide range of applications from fatigue life in shape-memory alloys (SMAs) to magnetism in multiferroic oxides. The geometric nonlinear theory of martensite universally applicable to all structural transitions has been developed. It predicts the reversibility of the transitions as manifested in the hysteresis behaviour based solely on crystal symmetry and geometric compatibilities between phases. In this article, we report on the verification of the theory using the high-throughput approach. The thin-film composition-spread technique was devised to rapidly map the lattice parameters and the thermal hysteresis of ternary alloy systems. A clear relationship between the hysteresis and the middle eigenvalue of the transformation stretch tensor as predicted by the theory was observed for the first time. We have also identified a new composition region of titanium-rich SMAs with potential for improved control of SMA properties.
Cui
Jun
J
Materials Analysis and Chemical Science, GE Global Research Center, Niskayuan, New York 12309, USA. cui@crd.ge.com
Chu
Yong S
YS
Famodu
Olugbenga O
OO
Furuya
Yasubumi
Y
Hattrick-Simpers
Jae
J
James
Richard D
RD
Ludwig
Alfred
A
Thienhaus
Sigurd
S
Wuttig
Manfred
M
Zhang
Zhiyong
Z
Takeuchi
Ichiro
I
D000465:Algorithms; D000497:Alloys; D001672:Biocompatible Materials; D001703:Biophysics / Q000379:methods*; D003300:Copper / Q000737:chemistry; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry; D004548:Elasticity; D005290:Ferric Compounds / Q000737:chemistry; D006358:Hot Temperature; D008280:Magnetics; D008422:Materials Testing; D015233:Models, Statistical; D008962:Models, Theoretical; D009532:Nickel / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D014961:X-Ray Diffraction
D000497:Alloys; D001672:Biocompatible Materials; D003722:Dental Alloys; D005290:Ferric Compounds; D010087:Oxides; C093826:Austenite; C000499:ferric oxide; D003300:Copper; D009532:Nickel; D014025:Titanium