Eventos Anais de eventos
COBEF 2019
COBEF 2019
PARÂMETROS TÉRMICOS DE SOLIDIFICAÇÃO E SEUS EFEITOS SOBRE AS CARACTERÍSTICAS MICROESTRUTURAIS DAS LIGAS Al-1%Sn e Al-1%Sn-1,5%Fe
Submission Author:
Camila Yuri Negrão Konno , SP
Co-Authors:
Camila Yuri Negrão Konno, Clarissa Cruz, Rafael Kakitani, Thiago Costa, Noé Cheung, Amauri Garcia
Presenter: Camila Yuri Negrão Konno
doi://10.26678/ABCM.COBEF2019.COF2019-0438
Abstract
The Al-1wt.%Sn and Al-1wt.%Sn-1.5wt.%Fe alloys were solidified under transient heat extraction and the thermal parameters imposed by the solidification process were correlated with the microstructural scale. The results obtained showed that for both investigated alloys, the microstructural morphology is composed by α-Al cells, and the intercellular regions were surrounded by β-Sn phase, in the binary alloy, and by β-Sn and Al3Fe-intermetallic, in the ternary alloy. The tip growth rate (¬VL) and cooling rate (Ṫ) ranges imposed during the upward solidification experiments in a water cooled mold, provided microstructural correlations against λC. Increasing VL and Ṫ lead to a more refined λC, following power laws equations, whose exponents are -0.55 and -1.1, respectively, for both alloys. The chemical composition profile of the alloys throughout the ingots showed that the transient solidification of the experiments provided conditions which avoided the occurrence of macrosegregation.
Keywords
Solidification, microstructural characterization, Al-Sn, Al-Sn-Fe, Thermal parameters
