Constitutive and transformation behavior of two-way shape memory (TWSM) nitinol

D. S. Ford; D. A. Hebda; Scott R. White

doi:10.1117/12.200919

2 February 1995 Constitutive and transformation behavior of two-way shape memory (TWSM) nitinol

D. S. Ford, D. A. Hebda, Scott R. White

Proceedings Volume 2427, Active Materials and Smart Structures; (1995) https://doi.org/10.1117/12.200919
Event: Symposium on Active Materials and Smart Structures: Society of Engineering Science 31st Annual Meeting, 1994, College Station, TX, United States

Abstract

Experimental data for 55/45 Ni-Ti alloy (Nitinol) is presented in this work for correlation to phenomenological and thermodynamic/micromechanical constitutive and transformation models for shape memory alloys. Hysteresis data is used to obtain the transformation temperatures M_s-martensitic start, M_f-martensitic finish, A_s-austenitic start, and A_f-austenitic finish. Nitinol wires are mechanically tested in tension at five different temperatures: below M_f, at (M_s + M_f)/2, at (M₂ + A_s)/2, at (A_s + A_f)/2, and above A_f. For the phenomenological models, several characterization parameters are required. These are obtained experimentally and the models are correlated with the data.

Citation Download Citation

D. S. Ford, D. A. Hebda, and Scott R. White "Constitutive and transformation behavior of two-way shape memory (TWSM) nitinol", Proc. SPIE 2427, Active Materials and Smart Structures, (2 February 1995); https://doi.org/10.1117/12.200919

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