Multiple Memory Shape Memory Alloys

Authors

  • Mohammad Ibraheem Khan,

    1. Smarter Alloys, Inc., MaRS Centre, South Tower, 101 College Street, Suite 200, Toronto, ON M5G 1L7, Canada
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  • Andrew Pequegnat,

    Corresponding author
    1. Centre for Advanced Materials Joining (CAMJ), University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
    2. Centre for Bioengineering and Biotechnology (CBB), University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
    • Smarter Alloys, Inc., MaRS Centre, South Tower, 101 College Street, Suite 200, Toronto, ON M5G 1L7, Canada.
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  • Y. Norman Zhou

    Corresponding author
    1. Centre for Advanced Materials Joining (CAMJ), University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
    2. Centre for Bioengineering and Biotechnology (CBB), University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
    • Smarter Alloys, Inc., MaRS Centre, South Tower, 101 College Street, Suite 200, Toronto, ON M5G 1L7, Canada.
    Search for more papers by this author

  • The Authors would like to acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC). Also, a special thanks to Siu Kei Tang, Billy Tam, Matt Daly, and Jeff Wang of the microwelding subgroup of the Centre for Advanced Materials Joining (CAMJ). Supporting Information is available from the Wiley Online Library or from the author.

Abstract

Until now, shape memory alloys (SMAs) have been largely limited to “remembering” a single memory. In other words, monolithic components only possess a single set of functional properties. The current work describes how theorized change to local chemical composition induced through laser processing enables controlled augmentation of transformation temperatures. Proof of concept was demonstrated by locally embedding multiple shape memories into a monolithic NiTi component. This novel technique overcomes traditional fabrication challenges and promises to enhance SMA functionality and facilitate novel applications through producing a new class of smart materials; namely multiple memory materials (MMMs).

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