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Effect of Temperature on the Deformation Behavior of B2 Austenite in a Polycrystalline Ni49.9Ti50.1 (at.Percent) Shape Memory AlloySuperelasticity in austenitic B2-NiTi is of great technical interest and has been studied in the past by several researchers [1]. However, investigation of temperature dependent deformation in B2-NiTi is equally important since competing mechanisms of stress-induced martensite (SIM), retained martensite, plastic and deformation twinning can lead to unusual mechanical behaviors. Identification of the role of various mechanisms contributing to the overall deformation response of B2-NiTi is imperative to understanding and maturing SMA-enabled technologies. Thus, the objective of this work was to study the deformation of polycrystalline Ni49.9Ti50.1 (at. %) above A(sub f) (105 C) in the B2 state at temperatures between 165-440 C, and generate a B2 deformation map showing active deformation mechanisms in different temperature-stress regimes.
Document ID
20150009941
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Garg, A. (NASA Glenn Research Center Cleveland, OH, United States)
Benafan, O. (NASA Glenn Research Center Cleveland, OH, United States)
Noebe, R. D. (NASA Glenn Research Center Cleveland, OH, United States)
Padula, S. A., II (NASA Glenn Research Center Cleveland, OH, United States)
Clausen, B. (Los Alamos Neutron Science Center Los Alamos, NM, United States)
Vogel, S. (Los Alamos Neutron Science Center Los Alamos, NM, United States)
Vaidyanathan, R. (University of Central Florida Orlando, FL, United States)
Date Acquired
June 5, 2015
Publication Date
May 20, 2013
Subject Category
Metals And Metallic Materials
Report/Patent Number
E-664428
Meeting Information
Meeting: SMST 2013: The International Conference on Shape Memory and Superelastic Technologies
Location: Prague
Country: Czechoslovakia
Start Date: May 20, 2013
End Date: May 24, 2013
Sponsors: Shape Memory and Superelastic Technologies
Funding Number(s)
WBS: WBS 794072.02.03.03.01
CONTRACT_GRANT: DE-AC52-06NA25396
Distribution Limits
Public
Copyright
Public Use Permitted.

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