Tensile behavior of B4C particulate reinforced Al2024 alloy metal matrix composites

• Main Authors: Nagaral Madeva, Pavan R., Shilpa P.S., Auradi V.
• Format: Article
• Language: English
• Published: University of Belgrade - Faculty of Mechanical Engineering, Belgrade 2017-01-01
• Series: FME Transactions
• Subjects: al2024 alloy; b4c particulates; ultimate tensile strength; yield strength; stir asting; percentage elongation
• Online Access: https://scindeks-clanci.ceon.rs/data/pdf/1451-2092/2017/1451-20921701093N.pdf

In the present investigation, microstructure study and tensile behavior of B4C particulate reinforced Al2024 alloy composites have been reported. Al2024 matrix composites containing boron carbide were fabricated by conventional stir casting method. The composites containing 3 and 6 wt. % of B4C (80 micron size)particulates were fabricated for the study. The micro- structure of the composite was examined by optical microscopy. Images were taken to identify the presence of B4C particle in aluminum matrix. Further, tensile behavior of as cast Al2024 alloy and Al2024-3 wt. % B4C and 6 wt. % B4C composites were studied. Tensile properties like ultimate tensile strength, yield strength and percentage elongation were evaluated as per ASTM standards. Microstructural observation revealed the uniform distribution of particles in the Al2024 alloy matrix. It was found from the analysis, that the ultimate tensile strength of composite was increased due to increasing amount of boron carbide particle in the composite and the yield strength was increased due to the higher value of boron carbide. Also percentage elongation of the composites decreases with increase of the order of boron carbide. Finally, it was found that in the stress - strain curve, the boron carbide was the main factor in improving the tensile strength of composites because of its high hardness. The composites in the present study have great potential for application as structural materials.