A study on effect of chill casting on A356 reinforced with Hematite metal matrix composite. (2021)

• Record Type: Journal Article
• Authors: Sunil Kumar, M.; Sathisha, N.; Chandra, Batluri Tilak
• Is Part Of: Materials today. Volume 35:Part 3(2021)
• Page Start: 450
• Page End: 455
• Publication Date: 2021
• Subjects: Metal matrix composite -- Stir casting technique -- With and without copper chill -- Al-A356 -- Hematite; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.02.963
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: The Present scenario in industries has huge demand in high strength and lightweight materials of aluminum alloy and its composites. In this paper an attempt is made to study the influence of copper chills in Aluminum alloy metal matrix composites. A356-Hematite particulate composites were fabricated through stir casting technique followed by sand moulds with and without copper chills, by varying weight percentage of Hematite particulates from 0 wt%, to 12 wt% in steps of 3 wt%. The test samples were prepared according to ASTM standards. The prepared samples have undergone microstructure, hardness, tensile and compression tests. The microstructure revealed that uniform distribution of Hematite particulates in the A356 matrix alloy and the rapid cooling rate helped to get fine grained structure. The use of copper chill in turn improved the hardness, tensile strength, and compressive strength of the chilled composite specimen as compared to as-cast specimen.