Nanostructured Nb reinforced NiTi shape memory alloy composite with high strength and narrow hysteresis

Shijie Hao, Lishan Cui, Daqiang Jiang, Cun Yu, Jiang Jiang, Xiaobin Shi, Zhenyang Liu, Shan Wang, Yandong Wang, Dennis E. Brown, Yang Ren

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

22 Citations (Scopus)

Abstract

An in-situ nanostructured Nb reinforced NiTi shape-memory alloy composite was fabricated by mechanical reduction of an as-cast Nb-NiTi eutectic alloy. The composite exhibits large elastic strain, high strength, narrow hysteresis, and high mechanical energy storage density and efficiency during tensile cycling. In situ synchrotron high-energy X-ray diffraction revealed that these superior properties were attributed to the strong coupling between nanostructured Nb and NiTi matrix during deformation. Furthermore, this study offers a good understanding of the deformation behavior of the nanoscale reinforcement embedded in the metal matrix deformed by stress-induced phase transformation. © 2013 AIP Publishing LLC.
Original languageEnglish
Article number231905
JournalApplied Physics Letters
Volume102
Issue number23
DOIs
Publication statusPublished - 10 Jun 2013
Externally publishedYes

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