Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
CHARACTERIZATION OF THE AA6082 MATRIX COMPOSITE WITH NBC OBTAINED THROUGH FRICTION STIR PROCESSING
Submission Author:
Hipolito Domingo Carvajal Fals , PR
Co-Authors:
Denner Traiano, Bruno Edu Arendarchuck, Simone do Rocio Ferraz Sabino, Luciano Lourençato, Hipolito Domingo Carvajal Fals
Presenter: Denner Traiano
doi://10.26678/ABCM.COBEM2023.COB2023-1878
Abstract
Towards the growing need to improve the wear performance and properties of aluminum alloys used in the automotive and industrial sectors, aluminum matrix surface composites (AMCs) have gained attention. Among the chief techniques, Friction stir processing (FSP) has emerged as a promising technology due to its energy efficiency and metallurgical advantages. So, in this work, an aluminum matrix alloy AA6082-T4 surface composite reinforced with niobium carbide (NbC) was obtained by FSP. A 200 μm thick layer of carbides was applied using thermal spraying for further processing. FSP was conducted with a threaded cylindrical pin tool, rotating at 1200 rpm and a feed speed of 40 mm/min. The FSP process involved different quantities of passes and a tilt angle of 2.5º in the feed direction. The samples were characterized using optical microscopy, scanning electron microscopy (SEM), x-ray spectroscopy (EDS), and Vickers microhardness tests. Scratching tests were performed to determine the coefficient of friction (CoF). The AMCs obtained on the base material's surfaces exhibited a reduced friction coefficient and improved microstructure with finer grain formation in the modified regions. Overall, it demonstrates the feasibility of using FSP to obtain surface composites and enhance the wear resistance of the AA6082-T4 alloy against friction.
Keywords
Friction Stir Processing, aluminum matrix composite, niobium carbide, Wear, microestruture
