Effect of Addition of Grain Refiner and Modifier on Microstructural and Mechanical Properties of Squeeze Cast A356 Alloy

Al-Si alloy of grade A356 is widely used in several industries such as automobile, aerospace, defense, and others owing to its low density as well as the combination of other properties such as high strength, excellent castability, excellent thermal conductivity, good corrosion resistance, and good...

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Bibliographic Details
Published in:Transactions of the Indian Institute of Metals 2022, Vol.75 (9), p.2395-2408
Main Authors: Tamuly, Reeturaj, Behl, Amit, Borkar, Hemant
Format: Article
Language:English
Subjects:
Abrasive wear
Alloys
Aluminum base alloys
Castability
Casting
Casting alloys
Chemistry and Materials Science
Corrosion and Coatings
Corrosion resistance
Corrosive wear
Foundry practice
Grain refinement
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Original Article
Silicon
Solution heat treatment
Squeeze casting
Thermal conductivity
Thermal resistance
Titanium
Tribology
Wear resistance
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Summary:Al-Si alloy of grade A356 is widely used in several industries such as automobile, aerospace, defense, and others owing to its low density as well as the combination of other properties such as high strength, excellent castability, excellent thermal conductivity, good corrosion resistance, and good wear/abrasive resistance. In previous studies, the mechanical properties of gravity die-cast Al–Si alloys were found to be improved by the addition of grain refiners such as boron and titanium and also with the addition of modifiers such as strontium. Squeeze casting is pressure-assisted casting process and has been found to improve the mechanical properties of Al alloys. In the current study, the effect of the addition of Al-Ti-B alloys used with the purpose of grain refinement as well as the effect of combined additions of Al-Ti-B and two Sr levels used with the purpose of microstructural modification in squeeze cast Al–Si alloy A356 are investigated. The microstructure developed in various alloy compositions of squeeze cast alloys and the mechanical properties are studied. The effect of T6 solution heat treatment on the squeeze cast alloys is also analyzed . The addition of grain refiner and modifier helped in improving the mechanical properties of the alloy and further heat treatment helped in increasing the properties of the alloy.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-022-02607-4