Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
The influence of heat treatments on NiTi springs hysteresis loop
Submission Author:
HUGO DE SOUZA OLIVEIRA , DF , Brazil
Co-Authors:
Sérgio Alves Bandeira, Aline Souza de Paula, HUGO DE SOUZA OLIVEIRA
Presenter: Sérgio Alves Bandeira
doi://10.26678/ABCM.COBEM2017.COB17-0995
Abstract
The influence of heat treatments on shape memory alloys is investigated with respect to changes in hysteresis loop of NiTi springs. Some aging temperatures are evaluated regarding the precipitation and growth of Ti3Ni4. The influence of these precipitates is then evaluated in terms of the shape of hysteresis loop, hardness, distribution of precipitates, morphology of microstructure and transformation temperatures. The results are analyzed with respect the influence of Ti3Ni4 in the hysteresis loop and how it can be utilized in the design of dynamic systems devices such as adaptative dynamic absorbers of vibrations
Keywords
nonlinear vibrations, Shape Memory Alloys
