Kumar K ,Presently working as a associate professor in the department of mechanical engineering ,RLJIT,doddaballapur,I am completed Ph.D., from
prestigious university 6 books,6 Patents,11 Journals,11 awards .etc.
Influence of particulates on microstructure, Mechanical and Fractured behaviour on Al-7075 alloy composite by FEA J Kumaraswamy, K C Anil, T R Veena, Mahadeva Reddy, K Sunil Kumar Australian Journal of Mechanical Engineering, 2025 Aluminium alloys are employed in advanced applications due to their desirable combination of low density, high strength, durability, availability, and cost vs. competing materials. The characteristics described above can be increased further by employing aluminium matrix composite materials reinforced with harder particles. The hybrid aluminium alloy (Al7075) composite was made in an electric resistance furnace using the sand mould process and reinforced with alumina (Al2O3) and boron carbide (B4C) particles. The purpose of this research to investigate the mechanical characteristics of Al7075-Al2O3-B4C hybrid composites with stable Al2O3 weight percentages (4%) and varied B4C weight percentages (2–6%). Mechanical characteristics includes tensile and compressive strength, hardness, and microstructure analysis were evaluated on the pure and cast specimens. In this study, which followed the ASTM standard, the mechanical characteristics of Al7075 alloy hybrid composites were examined experimentally and validated using FEA. The results showed that when hard ceramic particles (Al2O3/B4C) were added to matrix alloy (Al7075), mechanical characteristics such as compressive strength and hardness improved while tensile strength was reduced. The static structural tensile test was successfully simulated in ANSYS. It was observed that both FEA results and analytical results were correlated.
Effect of Silicon Carbide Particulates on Mechanical Behavior of Al5052 Alloy Metal Matrix Composites for Mining Applications V. Mohan, N. B. Doddapattar, K. Sunil Kumar Journal of Mines Metals and Fuels, 2024 In particular, the impact of Silicon Carbide (SiC) particles on the mechanical properties of stir-cast Al5052 alloy Metal Matrix Composites (MMCs) for rotor blade applications is examined in this work. The goal of integrating SiC particles is to improve mechanical characteristics including wear resistance, tensile strength, and hardness while preserving the ideal weight-tostrength ratio, which is essential for rotor blade performance. The Al5052 matrix was filled with SiC in a variety of compositions (0%, 2%, 4%, 6%, and 8% by weight), and the resultant composites underwent mechanical testing and microstructural examination. Due to the efficient load transfer and reinforcing processes, the results show a considerable improvement in tensile strength and hardness with the addition of SiC particles. Furthermore, microstructural analyses demonstrate a uniform dispersion of SiC in the matrix, which supports the improved performance attributes. Wear resistance of Al5052 alloy is greatly increased when Silicon Carbide (SiC) particles are added as reinforcement. This makes the composite material perfect for applications requiring great durability and longevity to survive hard mining conditions, such as wear plates, conveyor liners, and drill bits in mining machinery components.
Investigating the Mechanical Properties of Al 7075 Alloy for Automotive Applications: Synthesis and Analysis Kumaraswamy J, Anil K C, T R Veena, G. Purushotham, Sunil Kumar K Evergreen, 2023 : Due to their low weight, high strength and enhanced tribological properties, aluminium alloy composite materials are recognized globally after for highly scientific applications. Al7075 hybrid composite was created by using the sand mould process in an electric resistance furnace to reinforce aluminium oxide (Al 2 O 3 ) and boron carbide (B 4 C) particles. In this study, the mechanical behaviour of hybrid composites made of Al7075, Al 2 O 3 , and B 4 C with stable Al 2 O 3 contents of 2% and variable B 4 C weight percentages of 2% to 6% was examined. In both pure and cast specimens, the mechanical characteristics, such as tensile and compressive strength, hardness, and microstructure analysis, were assessed. In this study, the mechanical characteristics of the hybrid composites made from Al7075 alloy were experimentally studied and validated using the ASTM standard and FEA. The results showed that when hard ceramic particles (Al 2 O 3 /B 4 C) were added to a matrix alloy (Al7075), mechanical characteristics such as compressive strength and hardness improved while tensile strength was reduced. The static structural tensile test was successfully simulated in ANSYS. It was observed that both FEA results and analytical results were correlated.
Retrogression and re-aging of AL-7075 microstructure and corrosion behavior characterization Sunil Kumar K, , Dr P L Srinivasa Murthy, and International Journal of Engineering and Advanced Technology, 2019 In this movement I utilized all around naturally known as two stages heat treatment called RRA is connected on AL 7075 composite to inspect the corrosion behavior. this procedure incorporates the different phases of warmth medicines incorporates, strengthening, high temperature pre-precipitation, counterfeit maturing (T6), retrogression and re-maturing. The examples are at first aged to 473o and then extinguished in water medium .the examples are additionally aged to 18hr, 22hr, 26hr separately .after this examples are warmed 230o, 250o 270o, 290o with various time interims 7 and 14 min individually to improve the quality of the material this procedure we call it as retrogression and re-aging. After this directed test and came to realize that by utilizing RRA strategy we can expand the quality of the material to most extreme degree. With this RRA methodology we can increase the corrosion resistance of the material to next level.
Effect of retrogression and re-aging on fatigue crack growth behavior of Al 7075 Alloy Sunil Kumar K, , Dr P L Srinivasa Murthy, and International Journal of Innovative Technology and Exploring Engineering, 2019 In this activity I used very familiarly known as two steps heat treatment called RRA is applied on AL 7075 alloy to examine the fatigue behavior. this process includes the various stages of heat treatments includes, annealing, high temperature pre-precipitation, artificial aging (T6), retrogression and re-aging. The specimens are initially heated to 473o & then quenched in water medium .the specimens are further heated to 18hr, 22hr, 26hr respectively .after this specimens are heated 230o, 250o, 270o, 290o with different time intervals 7 & 14 min respectively to enhance the strength of the material this process we call it as retrogression and re-aging .after this conducted experiment and came to know that by using RRA method we can increase the strength of the material to maximum extent.
Study on tribological characterization of RRA treated aluminium 7075 alloy Journal of Advanced Research in Dynamical and Control Systems, 2019
