Eventos Anais de eventos
COBEF 2019
COBEF 2019
INFLUÊNCIA DAS VARIÁVEIS TÉRMICAS DE SOLIDIFICAÇÃO NA MICROESTRUTURA E DUREZA DA LIGA CU-14AL-5NI-5FE
Submission Author:
Givanildo Santos , SP
Co-Authors:
Rogerio Teram, Givanildo Santos, Maurício Nascimento, Francisco Yastami Nakamoto, Vinicius Torres dos Santos, Marcio Silva, Antonio Couto
Presenter: Rogerio Teram
doi://10.26678/ABCM.COBEF2019.COF2019-0542
Abstract
The objective of this work is to analyze the influence of the solidification variables of Cu-14% Al-5% Ni-5% Fe alloy on the hardness and microstructure obtained after the solidification of the ingot. The alloy was solidified in an upwardly unidirectional cooling device. Heat was extracted directionally through water cooling on an ABNT 1020 steel base. The microstructures were analyzed by scanning electron microscopy (MEV). The thermal variables of solidification of the displacement velocity of the liquidus isotherm (VL) and cooling rate (TR) were evaluated as a function of the distance of the heat extraction surface. The hardness was measured at the positions of the ingot thermocouples. As a result, it was observed that higher cooling rates have higher hardness values. The hardness values presented, when compared with Cu-10% Al-5% Ni-5% Fe alloy presented in previous works, were considerably higher.
Keywords
Bronze-alumínio, Solidificação, Resfriamento, Dureza
