Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
THERMO-PHYSICAL ANALYSIS OF THE CHARACTERISTICS OF AL-FE-ZR-(1,8; 5,0)WT%MG ALLOYS SOLIDIFIED IN HORIZONTAL UNIDIRECTIONAL MOLD
Submission Author:
Yan Campo , PA
Co-Authors:
Yan Campo , Marcus Vinícius Wanderley, Rafael Assis da Silva, Mauro Lobato, JOSÉ MARIA DO VALE QUARESMA
Presenter: Yan Campo
doi://10.26678/ABCM.COBEM2017.COB17-1350
Abstract
The Al-Mg alloys constitute an important group of aluminum alloys. Beyond of mechanical resistance gains, the magnesium allows keep excellent corrosion resistance and weldability. This paper aims to analyze Al-0,20wt%Zr-1,8wt%Mg and Al-0,20wt%Zr-5,0wt%Mg alloys. For the solidification a horizontal unidirectional mold was used in the form of a cubic chamber with six faces containing a single metallic face. In this way, the thermal performance can be evaluated: as solidification rate and cooling rate, besides macro-structural behavior and solute rejection, correlating it with microhardness. In the results, the alloy with 5,0wt% Mg presented higher solidification rate from the 15,0 mm position. The alloy with 1,8wt% Mg presented higher cooling rate in the initial positions. The increase in magnesium composition caused a decrease in grain size. The results of microhardness followed the behavior of solute rejection of magnesium.
Keywords
Al-Mg alloys, Rejection of solute, Solidification, speed and rate of solidification, Thermo-physical analysis
