Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
CORRELATION BETWEEN ELECTRICAL CONDUCTIVITY AND STRAIN HARDENING EXPONENT OF Al-Cu-Fe-Zr ALLOY SUBMITTED TO HEAT TREATMENT (150 ° / 2h)
Submission Author:
Gregory Oliveira , PA , Brazil
Co-Authors:
Gregory Oliveira, MARCOS CARDOSO, Larissa Afonso, Vinicius Silva dos Reis, Gustavo Rebelo, Clóvis Santana, JOSÉ MARIA DO VALE QUARESMA
Presenter: Mateus José Araújo de Souza
doi://10.26678/ABCM.COBEM2019.COB2019-2261
Abstract
Recently, aluminium alloys with zirconium have been widely used for electrical applications (including wires for high-voltage transmission lines) since they create the best combination of strength, electrical conductivity, and thermal resistance to heating (up to 300 ıC). The aim of this work is to analyze the influence of the heat treatment on the electrical conductivity and Strain Hardening Exponent [η] of Al-0,05% Cu-0,40% Fe-0,22% Zr alloy, whose ingots were obtained by die casting in "U" shape, machined and separated into two batches: the first is the material without heat treatment; the second was heat treated for two hours at 150 ° C. Subsequently, samples from both batches were cold rolled in diameters [4.0; 3.8; 3.0; 2.7] mm. The obtained wires were submitted to the electrical resistivity test and to the tensile test, in which the Electrical Conductivity and Strain Hardening Exponent [η] were determined through the tensile test data applied to the Hollomon method. It was observed that the wires with diameter 3.0 mm showed the highest values of Electrical Conductivity.
Keywords
Al-Zr alloy, Heat treatment, thermoresistivity, Strain-Hardening Exponent
