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Fabrication, Characterization and Machining of Al6061 Reinforced with Red Mud Composite

Journal of Minerals and Materials Characterization and Engineering 2022年第1期10卷 28-42页

作者： Poorna Chandra V. Ravi Kumar R. Kiran D. V. Ravi Kumar C. R. Prakash Rao R. suresh Department of Mechanical Engineering Global Academy of Technology Bengaluru India Department of Industrial & Automation Engineering VTU PG Centre Mysuru India

The Metal Matrix Composites application has increased in many areas of science and technology, because of its additional physical, wear and mechanical properties. In comparison with all mmc’s, aluminum-based mmc’s are finding wide applications due to their better strength to weight ratio, better stiffness, and high thermal conductivity as well as very good wear and corrosion properties. The properties of a composite mainly depend on better distribution of reinforcement in the matrix, which is very difficult to achieve. Basically Redmud is a byproduct of alumina, and it is waste product obtained during Bayer’s process. This waste product must be recycled else it may be dangerous to the environment. Redmud can be used as reinforcement for aluminium composites in order to achieve better properties. The proposed research work includes preparation of Aluminum 6061-Red mud metal matrix composites using liquid metallurgy route following stir casting technique. An alloy Al6061 containing 0.60 percent silicon and Magnesium of 0.82 percent was used as the matrix material. Two different compositions of the Aluminum 6061-Red mud composites are prepared in addition to the base matrix and evaluated for mechanical properties also the force acting on the cutting tool at different spindle speeds during machining of the composite materials were analyzed.

关键词： Al6061 Redmud Machining mmc’s Cutting Force Measurement

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Role of Heat Treatment on Al6061- Frit Particulate Composites

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Journal of Minerals and Materials Characterization and Engineering 2012年第4期11卷 353-363页

作者： D. Ramesh R.P. swamy T.K. Chandrashekar Department of Mechanical Engineering Sri Siddhartha Institute of Technology Tumkur-572105 India Department of studies in Mechanical Engineering University B.D.T. College of Engineering Davangere-577004 India Research scholar Sri Siddhartha Institute of Technology Tumkur-572105 India

In recent decades, aluminium alloy based metal matrix composites are used in several applications. Al6061 has been used as matrix material due to its good formability, excellent mechanical properties and etc., wide spectrum of the applications in industrial sectors. Inclusion of Frit particulates as reinforcement in Al6061 alloy material system improves its hardness and decrease in density. In the present investigation Al6061-Frit particulate composites were produced by ‘VORTEX’ method with varying weight percentages of Frit particulate from 0 wt% to 10 wt% in steps of *** as cast matrix alloy and its composites have been subjected to solutionizing treatment at a temperature of 530℃ for 2 hours followed by quenching in different media such as air, water and ice. The quenched specimens were subjected to artificial ageing. Aged specimens were subjected to ultra-sonic test using ultra-sonic flaw detector testing apparatus to identify the common casting defects like porosity, blow holes. Macrostructure and microstructure studies were conducted on as cast and composites in order to investigate the distribution of frit particles retained in matrix material system. Micro structural studies were carried out to understand nature of structure. Density measurement was carried out on both Al6061matrix alloy and Al6061-Frit particulate composite. Hardness tests have been conducted both on Al6061 matrix alloy and Al6061-Frit particulate composite before and after heat treatment. It has been observed under identical heat treatment conditions adopted, Al6061-Frit particulate composites exhibited significant improvement in hardness when compared with Al6061 alloy.

关键词： mmc’s solutionizing Ageing Density Hardness

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