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Ghasem Eisaabadi bozcheloei

Ghasem Eisaabadi bozcheloei

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-3634-4433
Education: PhD.
ScopusId: 55228660500
HIndex:
Faculty: Engineering
Address: Arak University
Phone:

Research

Title
EFFECTS OF Sr ON THE MICROSTRUCTURE OF ELECTROMAGNETICALLY STIRRED SEMI SOLID HYPOEUTECTIC Al-Si ALLOYS
Type
Presentation
Keywords
Electromagnetic stirring, Semi solid, Al-Si alloys, Modification, Cooling Curve
Year
2016
Researchers Ghasem Eisaabadi bozcheloei ، Ali Sonboli ، Reza Beygi ، Majid Zarezadeh Mehrizi ، Ashkan Nouri

Abstract

The present study investigated the effects of Sr addition on the microstructure of semi-solid Al A356 alloy during electromagnetic stirring. Different amounts of Sr (0-300 ppm) were added to the alloy and the effect of Sr on eutectic nucleation and growth temperature of the eutectic silicon phase were determined. Also, effect of Sr addition on the characteristics of primary aluminum phase was determined using image analysis. The results indicate that addition of the Sr up to 90 ppm increased the solidification range (TL-TS) of the alloy and further addition of Sr decreased the value of TL-TS. Image analysis revealed that increasing of Sr up to 90 ppm increased the globularity (roundness) of primary aluminum particles. However, further addition of the Sr reduced the roundness of particles. Also, it was found that addition of Sr in all amounts increased the area percentage of primary aluminum particles compared to non-modified alloy. The mechanisms for changes in TL-TS, roundness and area percentage of primary aluminum phase are also discussed.