2024 - Sustainable Industrial Processing Summit
SIPS 2024 Volume 5. Leite Intl. Symp / Iron and Steel
| Editors: | F. Kongoli, P. Assis, R. Alvarenga Vilela, J.A. de Castro, B. Deo, W. Ferreira Santos Jr., GS. Mahobia, T. Usui |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2024 |
| Pages: | 328 pages |
| ISBN: | 978-1-998384-12-9 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
STUDY OF MICROHARDNESS, CORROSION RESISTANCE AND WEAR PROPERTIES OF SINTERED Ni-Ti ALLOYS
Gabriela Araujo Gois1; Paulo Assis1; Orimar Reis2;1FEDERAL UNIVERSITY OF OURO PRETO, Ouro Preto, Brazil; 2INSTITUTO FEDERAL DE MINAS GERAIS, Ouro Preto, Brazil;
Type of Paper: Regular
Id Paper: 265
Topic: 2
Abstract:
The Ni-Ti alloy exhibits exceptional properties that enhance its compatibility with the human body, notably its low density, mechanical strength, corrosion and wear resistance, shape memory effect, and superelasticity. The shape memory effect involves a thermal hysteresis due to phase transitions from martensite to austenite when the alloy is cooled and then heated above its transformation threshold, enabling it to revert to its original shape. The superelasticity effect allows the material to return to its original shape after deformation of up to 10% under applied load. In this study, three samples containing 49.5% Ti and 50.5% Ni were produced using the powder metallurgy technique. The chemical composition of these samples was analyzed. The Ni and Ti metal powder mixture was sintered in a controlled atmosphere furnace at 1118°C in the presence of an inert atmosphere with analytical argon 2.0. Following analysis under an optical microscope and scanning electron microscope (SEM), Vickers microhardness, corrosion, and wear tests were conducted to evaluate the alloy's suitability for prosthetics and orthopedic implants.