Combinatorial search of thermoelastic shape-memory alloys with extremely small hysteresis width

Jun Cui, Yong S. Chu, Olugbenga O. Famodu, Yasubumi Furuya, Jae Hattrick-Simpers, Richard D. James, Alfred Ludwig, Sigurd Thienhaus, Manfred Wuttig, Zhiyong Zhang, Ichiro Takeuchi

Research output: Contribution to journalArticlepeer-review

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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.

Original languageEnglish (US)
Pages (from-to)286-290
Number of pages5
JournalNature Materials
Issue number4
StatePublished - Apr 16 2006

Bibliographical note

Funding Information:
This work was supported by ONR-N000140110761, ONR-N000140410085, NSF DMR-0231291, NSF DMS-0074043 and MRSEC DMR-0520471. Use of the Advanced Photon Source was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No W-31-109-Eng-38. Correspondence and requests for materials should be addressed to J.C.


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