Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
THE EFFECT OF HEAT TREATMENT ABOUT THE DUCTILITY AND THE STRAIN-HARDENING EXPONENT FOR THE AL-CU-FE-ZR ALLOY
Submission Author:
Vinicius Silva dos Reis , PA
Co-Authors:
Vinicius Silva dos Reis, BEATRIZ SEABRA MELO, Gregory Oliveira, Clóvis Santana, Carlos Vinícius de Paes Santos, MARCOS CARDOSO, JOSÉ MARIA DO VALE QUARESMA
Presenter: Vinicius Silva dos Reis
doi://10.26678/ABCM.COBEM2019.COB2019-1808
Abstract
The aim work is the influence of the heat treatment on the Strain-Hardening Exponent [η] of the Al-0.05%Cu-0.40%Fe-0.22%Zr alloy. The ingots were obtained by casting in a U-shape metallic mold, machined and separated into two lots: the first is the material without heat treatment; the second was heat treated for 2 hours at 150°C. Subsequently, the samples from both lots were cold rolled up to the [4.0, 3.8, 3.0, 2.7] mm diameters. The wires were subjected to the resistivity test and tensile test, in which it was determined the electrical and mechanical characteristics, respectively. The values of Strain-Hardening Exponent [η] were obtained by the Hollomon method, applying data from the tensile test. It was analyzed the variation of [η] compared to the UTS values, and correlated to the ductility evaluation, using the elongation [δ] and dimples ratio [ϑ], obtained by quantitative metallography applied to photomicrographs of the wire fractures. It was observed that the increasing values of [η], presented by the heat-treated specimens, showed a relation with increasing ductility of the material.
Keywords
Al-Zr alloys, Heat treatment, Mechanical Characterization, Strain-Hardening Exponent, Ductility
