Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
CORROSION BEHAVIOR SPRAY FORMING OF CU-AL-NI SHAPE MEMORY ALLOY
Submission Author:
EDELIZE ANGELICA GOMES , MG
Co-Authors:
EDELIZE ANGELICA GOMES, Vanessa Lins
Presenter: EDELIZE ANGELICA GOMES
doi://10.26678/ABCM.COBEM2019.COB2019-2241
Abstract
Shape Memory Alloys (SMA) have some exceptional properties, such as shape memory effect and superelasticity. Both are associated with a martensitic/austenitic phase transformation. Alloys of the Cu-Al-Ni, Cu-ZnAl and NiTi system belong to this class of material. Interest in the study of Cu as the SMA base arises from the fact that they are cheaper than NiTi and can achieve better properties in specific applications. In this way, the electrochemical properties of the Cu-Al-Ni system processed by spray conformation in 3.5% m/v NaCl solution were measured by polarization and electrochemical impedance spectroscopy. The polarization results showed that the corrosive behavior of the Cu-Al-Ni alloy in the NaCl solution was dominated by the Cu component. The impedance modulus increased with the immersion time due to the continuous growth of the passive film on the alloy surface. This system attracts the attention of the scientific community because it is a good candidate in the application of high temperature shape memory alloys (HTSMA), operating above 100 ° C.
Keywords
Cu-Al-Ni shape memory alloy, SPRAY FORMING, corrosion, electrochemical impedance spectroscopy
