Nonlocal Superelastic Model of Size-Dependent Hardening and Dissipation in Single Crystal Cu-Al-Ni Shape Memory Alloys
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Qiao-2011-Nonlocal Superelastic Model of Size-Dependent Hardening and Dissipation.pdf
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Author(s)
Qiao, Lei
Rimoli, Julian J.
Chen, Ying
Schuh, Christopher A.
Radovitzky, Raul
Date Issued
February 2011
Journal
Physical review letters
Publisher
American Physical Society
Citation
Qiao, Lei et al. “Nonlocal Superelastic Model of Size-Dependent Hardening and Dissipation in Single Crystal Cu-Al-Ni Shape Memory Alloys.” Physical Review Letters 106.8 (2011) : n. pag. © 2011 American Physical Society
Version
Final published version
Abstract
We propose a nonlocal continuum model to describe the size-dependent superelastic effect observed in recent experiments of single crystal Cu-Al-Ni shape memory alloys. The model introduces two length scales, one in the free energy and one in the dissipation, which account for the size-dependent hardening and dissipation in the loading and unloading response of micro- and nanopillars subject to compression tests. The information provided by the model suggests that the size dependence observed in the dissipation is likely to be associated with a nonuniform evolution of the distribution of the austenitic and martensitic phases during the loading cycle.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.106.085504
