, Volume 67, Issue 12, pp 2908–2913 | Cite as

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


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.


Austenite Martensite Slip Plane Applied Strain Slip Trace 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



MLW and GBT acknowledge the NASA grant NNX09AO61A and the NASA FAP Supersonics project, Dale Hopkins, API. The authors would like to thank D. Frey & G. Buerki for technical assistance with the in situ SEM Indenter.


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Copyright information

© The Minerals, Metals & Materials Society 2015

Authors and Affiliations

  1. 1.Laboratory for Mechanics of Materials and NanostructuresEmpa, Swiss Federal Laboratories for Materials Science and TechnologyThunSwitzerland
  2. 2.Laboratory for Nanometallurgy, Department of Materials ScienceETH ZürichZurichSwitzerland
  3. 3.Structure and Nano-/Micromechanics of MaterialsMax-Planck-Institut für Eisenforschung GmbHDüsseldorfGermany
  4. 4.Department of Metallurgical and Materials EngineeringThe University of AlabamaTuscaloosaUSA

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