Elevated Temperature, In Situ Micromechanical Characterization of a High Temperature Ternary Shape Memory Alloy

J. M. Wheeler, C. Niederberger, R. Raghavan, G. Thompson, M. Weaver, J. Michler

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The microthermomechanical behavior of a precipitation-hardenable Ni-48Ti-25Pd (at.%) shape memory alloy has been investigated as a function of temperature. Micropillars were fabricated within a large 〈145〉-oriented grain and compressed in situ in the SEM at elevated temperatures corresponding to the martensite and austenite phase transformation temperatures. The precipitation-strengthened alloys exhibited stable pseudoelastic behavior with little or no residual strains when near the transformation temperatures. In the plastic regime, slip was observed to occur via pencil glide, circumventing the fine scale precipitates along multiple slip planes.

    Original languageEnglish
    Pages (from-to)2908-2913
    Number of pages6
    JournalJOM
    Volume67
    Issue number12
    DOIs
    Publication statusPublished - 1 Dec 2015

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