Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 13 1 2026 04 01 Reinforcement Surface Modification Effect on the Microstructure, Mechanical, and Tensile Fractography of Al2219 Alloy B4C Composites 197 210 9951 10.22075/macs.2025.34881.1705 EN Subhashchandra Ganiger Department of Mechanical Engineering, B.L.D.E.A’s Dr. P. G. Halakatti College of Engineering and Technology, Vijayapur-586103, Karnataka, India Mahadev Sakri Department of Mechanical Engineering, B.L.D.E.A’s Dr. P. G. Halakatti College of Engineering and Technology, Vijayapur-586103, Karnataka, India Naveen Kumar Bannuru Karagaiah Department of Mechanical Engineering, M S Ramaiah Institute of Technology, Bengaluru, India Halkur Siddagangaiah Kumar Department of Mechanical Engineering, Nitte (Deemed to be University), NMAM Institute of Technology, Karkala-574110, Karnataka, India Manjunath Yadav Siriyanna Department of Mechanical Engineering, Government Engineering College, Gangavathi-583227, Karnataka, India Vijayendra Kukanur Department of Mechanical Engineering, H.K.E. Society’s SiR M. Visvesvaraya College of Engineering, Raichur-584135, Karnataka, India Madeva Nagaral Aircraft Research and Design Centre, Hindustan Aeronautics Limited, Bangalore-560037, Karnataka, India Fazil Nalband Department of Mechanical Engineering, Ballari Institute of Technology and Management, Ballari, Karnataka, India Virupaxi Auradi Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumakuru-572103, Karnataka, India Nagaraj Namdev Department of Mechanical Engineering, APS Polytechnic, Bangalore-560082, Karnataka, India Journal Article 2024 07 28 Al2219 alloy composites were produced through the stir cast process, with varying amounts of copper-coated B₄C particles (2%, 4%, 6%, 8%, and 10%) incorporated. The mechanical performance of surface-modified B₄C additions to Al2219 alloy was examined by conducting tensile tests on the prepared composites. The synthesized composites' microstructural, mechanical, and tensile fractured surfaces were evaluated. Characterization of the samples' microstructure using SEM microscopy and EDS patterns. B₄C particle existence was verified by the EDS findings. The inclusion of Cu-coated B₄C reinforcement enhanced the hardness, tensile, and bending strength of the metal composite in contrast to the uncoated B₄C particles. Hardness of Al2219 alloy was improved by 92.4% with the 10 wt.% of Cu coated B₄C in the Al matrix. Further, there was a 73.5 % improvement in the ultimate strength. The Al2219 alloy composite's ductility decreased with the reinforcement's incorporation. Tensile fractured surfaces SEM micrographs show strong bonding between the matrix and boron carbide particles. The particle shear was observed in the case of copper-coated B₄C reinforced composites due to increased wettability. Various fractured surfaces were studied using SEM micrographs to determine fracture mechanisms in composites. https://macs.semnan.ac.ir/article_9951_0779b1428243e4e11ab7f77d8b9a34fb.pdf