The effect of cobalt element addition on the characteristics of equiatomic NiTi shape memory alloy

Autor:	Ali A. Aljubouri, Mudhafer A. Mohammed, Safa H. Mohammed
Rok vydání:	2020
Předmět:	History Materials science chemistry Nickel titanium chemistry.chemical_element Shape-memory alloy Composite material Cobalt Computer Science Applications Education
Zdroj:	Journal of Physics: Conference Series. 1660:012038
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/1660/1/012038
Popis:	The influence of cobalt addition on the transformation temperatures, microstructure, and micro-hardness of equiatomic NiTi shape memory alloy was studied. The alloys composition was (50 % at. Ni, 50% at. Ti) and (43.45 % at. Ni, 54.728 % at. Ti and Co 1.815 % at.). Vacuum induction melting method is used to produce the shape memory alloys. The investigation of the characteristics of the samples was carried out using, scanning electron microscope conducted with energy dispersive X- ray spectrometer, differential scanning calorimeter, x-ray diffraction measurement and vickers micro-hardness testing. The results show the microstructure of two alloys contain Ti2Ni precipitate phase, the martensite phase layers increase with cobalt addition. The micro-hardness increased, the austenite starts temperature and austenite finish temperature decreases, and thermal hysteresis becomes narrower, after adding a small amount of cobalt.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::db958ed2af24924b0204532b43eb22c2 https://doi.org/10.1088/1742-6596/1660/1/012038 Zobrazit plný text záznamu