Semi Solid Casting of Aluminum Alloy Using a Cooling Slope Technic.

Hawzheen Abdulwahid Ibrahim; Mohammadtaher M. Saeed Mulapeer

doi:10.21271/ZJPAS.32.3.6

Authors

Hawzheen Abdulwahid Ibrahim Department of Mechanical and Mechatronics Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region, Iraq.
Mohammadtaher M. Saeed Mulapeer Department of Mechanical and Mechatronics Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region, Iraq.

DOI:

https://doi.org/10.21271/ZJPAS.32.3.6

Keywords:

Al alloy 6063, Semi-solid casting, Cooling slope, Mechanical properties, Structure morphology.

Abstract

In this study, semi-solid metal casting technology has been used to make castings from Al alloy 6063 scrap using different casting temperatures and a cooling slope of 30cm long. The purpose of the cooling slope was to cool down the liquid metal into a semi-solid state of about 60% liquid before entering the mold. The results showed that the semi-solid metal cast samples that pass over a cooling slope had higher strength and ductility as compared to the traditional direct casted samples due to the evolution of microstructure from dendritic into globular morphology. A ductility increase over 38%, 100%, and 34% is recorded for semi-solid casting over a cooling slope compared to direct casting for liquid metal at 750^oC, 800^oC, and 900^oC respectively. Strength is improved by about 8% for semi-solid casting at 750 and 900^oC compared to direct casting. For 800^oC no improvement is recorded in terms of the tensile strength for cooling slope over direct casting

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