Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
CHARACTERIZATION AND ANALYSIS OF AL-6%MG ALLOY MODIFIED WITH 0.30% ZR AND SUBJECTED TO STRESS RELIEF OF 400 °C/ 1H
Submission Author:
Andrey Coelho das Neves , PA
Co-Authors:
Andrey Coelho das Neves, Natália Luiza Abucater Brum, Brenda Daniel, Aélcio Santos, Emerson Prazeres, JOSÉ MARIA DO VALE QUARESMA
Presenter: Andrey Coelho das Neves
doi://10.26678/ABCM.COBEM2019.COB2019-2279
Abstract
The growing demand for electricity requires the production of increasingly efficient electrical cables for transmission and distribution of energy. This work aims to analyze the mechanical and electrical characteristics of Al-6% Mg alloy with the addition of 0.30% of Zr and the influence of the thermal stress relief treatment on these characteristics. The alloys were cast in a muffle furnace and cast in a copper mold (section of the Properzi wheel) cooled in water. Cross sections of each ingot were obtained and passed through sanding and polishing processes for metallographic characterization. From each ingot, the reference samples were cut and machined to 9.5mm in diameter and cold rolled until they reached the 3mm diameter. Afterwards, two groups were separated: those without heat treatment and those treated thermally, the heat treatment was at 400 ° C for 1 hour. The tensile test was performed for mechanical characterization and for electric characterization the electric resistance test was performed. The electrical conductivity test was performed and due to the amount of magnesium solute the alloys obtained an average electrical conductivity value of 30.34% IACS. The limits of tensile strength and elongation of the alloys before and after the heat treatment were evaluated. This treatment caused ultimate tensile strength loss and real strain gain of the samples. In the curves resulting from the tensile tests, in all the alloys, were observed the Portevin-Le Chatelier phenomenon.
Keywords
Aluminum alloys, stress relief, mechanical and electrical characterization, portevin-le chatelier effect
