Fabrication, modeling, and characterization of porous shape memory alloys
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This paper will present powder metallurgical methods for producing porous NiTi from elemental powders of 50at% Ni and 50at% Ti using a sintering approach in a high pressure environment. Different pore sizes and volume fractions of NiTi SMAs are fabricated and characterized in terms of composition and phase transformation characteristics using calorimetric measurements. Quasi-static and dynamic loading experiments are conducted on samples produced with the presented methodology and their shape recovery and energy absorption characteristics are measured during the forward and reverse phase transformation and detwinning. A micromechanical averaging method for modeling the behavior of porous SMAs is presented. Correlation of experimental results with theoretical predictions of the micromechanical method for the case of quasi-static loading is discussed.
name of conference
SPIE's 8th Annual International Symposium on Smart Structures and Materials
author list (cited authors)
Lagoudas, D. C., Entchev, P. B., & Vandygriff, E. L.
editor list (cited editors)