Title of article
Assessment of the Microstructure and Solidification Characteristics of Al–20% Mg2Si Composite under Melt Superheating Treatment Using Thermal Analysis
Author/Authors
Shabestari, Saeed G. School of Metallurgy and Materials Engineering - Iran University of Science and Technology (IUST) - Narmak - Tehran, Iran , Ashkvary, Sahar School of Metallurgy and Materials Engineering - Iran University of Science and Technology (IUST) - Narmak - Tehran, Iran , Yavari, Farnaz School of Metallurgy and Materials Engineering - Iran University of Science and Technology (IUST) - Narmak - Tehran, Iran
Pages
9
From page
1
To page
9
Abstract
The influence of melt superheating treatment on the solidification characteristics and microstructure of
Al–20%Mg2Si in-situ composite has been investigated. The results revealed that melt superheating temperature has
significant effects on solidification parameters and morphology of primary Mg2Si particles. Solidification
parameters acquired using the cooling curve thermal analysis method, indicate that both nucleation temperature
and nucleation undercooling of primary Mg2Si particles increase by increasing melt superheating temperature,
while recalescence undercooling decrease under the same condition. Also, based on the microstructural evaluations,
melt superheating treatment can refine primary Mg2Si particles and alter their morphology from dendritic shape to
more spherical shape and the eutectic microstructure of α-Al + Mg2Si becomes finer and the distance between
eutectic layers becomes smaller..
Keywords
solidification , Al–20%Mg2Si in-situ composite , melt superheating treatment , cooling curve thermal analysis , microstructure
Journal title
Iranian Journal of Materials Science and Engineering
Serial Year
2021
Record number
2685714
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