Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Characterization of Nitinol alloy in the commercial state
Submission Author:
Rivaldo Filho , PB
Co-Authors:
Ricardo Francisco Alves, Luan Costa, Guilherme Oliveira, Thomas de Oliveira, Thiago Viana, Rivaldo Filho
Presenter: Rivaldo Filho
doi://10.26678/ABCM.COBEM2017.COB17-2690
Abstract
Shape memory alloys (SMA) are classified as active and intelligent materials. The nickel titanium (NiTi) alloy with composition around 55% by weight, better known commercially as Nitinol, corresponds to this group of metallic materials that have the ability to return to a format or size previously defined when subjected to a thermal cycle Appropriate, called "Shape Memory Effect" (SME). The phase transformation temperatures are defined as As (austenite start), Af (austenite finished), Ms (martensite start) and Mf (martensite finished), ie, beginning and end of austenitic transformation and beginning and end of martensitic transformation. The objective of the present work is the study of the NiTi alloy in relation to SME and the comparison of mechanical properties and structures by means of metallographic analyzes (optical and electron microscopy), SEM, XDR and EDS, Vickers microhardness tests under the conditions.
Keywords
Shape Memory Alloy, Nitinol, Shape Memory Effect.
