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Determining Recoverable and Irrecoverable Contributions to Accumulated Strain in a NiTiPd High-Temperature Shape Memory Alloy During Thermomechanical CyclingWhen Ni(29.5)Ti(50.5)Pd30 shape memory alloy is thermally cycled under stress, significant strain can accumulate due to elasticity, remnant oriented martensite and plasticity. The strain due to remnant martensite can be recovered by further thermal cycling under 0 MPa until the original transformation-induced volume change and martensite coefficient of thermal expansion are obtained. Using this technique, it was determined that the 8.15% total accumulated strain after cycling under 200 MPa consisted of 0.38%, 3.97% and 3.87% for elasticity, remnant oriented martensite and creep/plasticity, respectively.
Document ID
20110016169
Document Type
Reprint (Version printed in journal)
Authors
Monroe, J. A. (Texas A&M Univ. College Station, TX, United States)
Karaman, I. (Texas A&M Univ. College Station, TX, United States)
Lagoudas, D. C. (Texas A&M Univ. College Station, TX, United States)
Bigelow, G. (NASA Glenn Research Center Cleveland, OH, United States)
Noebe, R. D. (NASA Glenn Research Center Cleveland, OH, United States)
Padula, S., II (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
July 1, 2011
Publication Information
Publication: Scripta Materialia
Volume: 65
Issue: 2
Subject Category
Mechanical Engineering
Report/Patent Number
E-17926
Funding Number(s)
WBS: WBS 561581.02.08.03.15.13
CONTRACT_GRANT: NNX07AB56A
Distribution Limits
Public
Copyright
Other