Characterization and Mechanical Properties of 2014 Aluminum Alloy Reinforced with Al2O3p Composite Produced by Two-Stage Stir Casting Route

• Published in: Journal of the Institution of Engineers (India) Series C Vol. 100; no. 2; pp. 277 - 282
• Main Authors: Bharath, V., Ajawan, Santhrusht S., Nagaral, Madev, Auradi, Virupaxi, Kori, Shivaputrappa Amarappa
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 05.04.2019; Springer Nature B.V
• Subjects: Aerospace industry; Aerospace Technology and Astronautics; Aluminum; Aluminum base alloys; Density; Electrical resistivity; Engineering; Grain refinement; Hardness; Industrial and Production Engineering; Industrial applications; Materials selection; Mechanical Engineering; Mechanical properties; Metal matrix composites; Original Contribution; Scanning electron microscopy; Stiffness; Tensile strength; Weight reduction; 2014 Al alloy; Two stage stir casting; Al; Scanning electron microscopy (SEM); O
• ISSN: 2250-0545; 2250-0553
• DOI: 10.1007/s40032-018-0442-x

Metal matrix composites (MMC’s) form appropriate choice of materials where there is a demand for stiffness, strength combined with low weight for different applications. The applications of Aluminum based MMC’s as engineering materials has been exceedingly increased in almost all industrial sectors. Aluminum strengthened with Al 2 O 3p gives excellent physical and mechanical properties like high hardness, low density, high electrical conductivity etc., which are generally used in the field of aerospace, automobile and industrial applications. In present work, an attempt is being made to integrate 2014 Al alloy with Al 2 O 3p by two stage stir casting with addition level of reinforcement maintained at 9 and 12 wt%. Microstructural characterization carried out using scanning electron microscopy showed fairly uniform distribution of Al 2 O 3p with grain refinement of the matrix. These prepared composites are mechanically characterized as per the ASTM standards using computerized universal testing machine. Improvements in tensile strength, density and hardness of the prepared composites were observed with increase in the reinforcement wt%. Percentage improvements of 5.09% (9 wt%), 17.65% (12 wt%) in terms of tensile strength and 29.18% (9 wt%), 43.69% (12 wt%) in terms of hardness were obtained respectively.