Open AccessResearch on Homogenization Treatment of Mg-8wt.% Sn-1.5 wt.% Al Alloy
Author(s) -
Sun Zhaoqian,
Yongjun Li,
Kui Zhang,
Xinggang Li,
Minglin Ma,
Guoliang Shi,
Jiawei Yuan
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1907/1/012023
Subject(s) - eutectic system , differential scanning calorimetry , homogenization (climate) , alloy , microstructure , scanning electron microscope , optical microscope , materials science , endothermic process , diffraction , microscope , analytical chemistry (journal) , metallurgy , crystallography , composite material , thermodynamics , chemistry , optics , physics , biodiversity , ecology , organic chemistry , adsorption , chromatography , biology
The microstructure and morphology of Mg-8wt.%Sn-1.5wt.%Al alloy during homogenization were investigated by optical microscope (OM), scanning electron microscope (SEM), energy dispersive analysis (EDS) and HCT-3 comprehensive thermal analyzer. The results show that plenty of dendrite segregation arise in the as-cast alloy, and non-equilibrium eutectic phases distribute along the grain boundaries; at the same time, a large number of Sn and Al atoms segregated. The differential scanning calorimetry (DSC) curve shows that only one endothermic peak (549 °C) exists, which is caused by the redissolution of Mg 2 Sn phase; according to the homogenization empirical formula, 460 °C to 500 °C is the appropriate heat period. However, surface oxidation appears when treated at 500 °C; so atmosphere (Ar2) protect was used, after treating for 500 °C×48 h, ideal resolution effect has been achieved.