Mr. A. Arunnath

Scopus Publications

Exploring the effect of bio-silica on the mechanical, microstructural, and corrosion properties of aluminium metal matrix composites
K. Periasamy, P. Prathap, A. Arunnath, S. Madhu
Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2026
The role of silica in the aluminium alloy is to enhance its mechanical properties. Silica is an eco-friendly material that lowers the melting temperature which in turn enhances the fluidity of alloys. Low-cost synthesis, abundant natural resources, and mass production are other merits of silicon. In this investigation, plant-based bio-silica particles were incorporated in aluminium 7075 hybrid composites. The rice husk is rich in silica, and when it is burned or processed, it turns into ash, known as rice husk ash (RHA). After purification, the silica in RHA can be extracted using alkali fusion. Stir casting processes were used to fabricate hybrid composite material. Aluminium 7075 hybrid composites reinforced with different wt.% (0, 3, 6, and 9) of bio-silica extracted from rice husk were fabricated. Mechanical properties such as tensile, hardness, and impact were evaluated. Also, corrosion resistance was studied for the fabricated composites. The samples with different proportional values such as AlB (Al7075), AlBS1 (97 wt. % Al7075 + 3 wt. % bio-silica), AlBS2 (94% Al7075 + 6 wt. % bio-silica), and AlBS3 (91 wt. % Al7075 + 9 wt. % bio-silica) were fabricated by the stir casting process. Detailed microstructure characterization has been investigated using scanning electron microscopy (SEM). AlBS3 hybrid composites demonstrate a notable enhancement of 303.66 Mpa tensile strength and we observed a remarkable 10% increase in ductility compared to other composites. It was noticed that the sample AlBS3 shows an increased hardness of 162.4 HV and an impact energy of 26.67 kJ/mm2 due to the increased number of bio-silica particles. SEM-based fractography analysis of tensile and impact test specimens revealed the presence of dimples, cleavage facets, and intergranular cracks offering valuable insights into the failure mode.
Advancement in the Micro-Structural and Mechanical Behaviour of AA 7075 Alloy Through Incorporation of Boron Carbide and Zirconia Reinforcements
K. Ravikumar, S. Dinesh Kumar, V. Nirmal Kannan, A. Arunnath, Rajadurai Narayana Murthy
Aip Conference Proceedings, 2026
AN OVERVIEW on the MICROSTRUCTURAL, MECHANICAL, and BIO-PROPERTIES of TITANIUM-BASED MATERIALS SUBJECTED to EQUAL CHANNEL ANGULAR PRESSING PROCESS; METHODS and APPLICATIONS
K. RAVIKUMAR, S. DINESH KUMAR, NIRMAL KANNAN, G. RATHINASABAPATHI, A. ARUNNATH
Surface Review and Letters, 2025
Equal channel angular Pressing (ECAP) is a thermomechanical treatment generally applied to metals, alloys, and composite materials to alter the coarse grain structure into ultrafine structure, thereby improving the strength, corrosion resistance, and biocompatibility behaviors. The advanced nano-material science urges to enhance the innovative methods for developing the properties of current materials. The effects of ECAP on microstructural refinement and the development of mechanical and biocompatibility behaviors of Ti materials were investigated. The distinctiveness of ECAP is that the severe plastic deformation (SPD) employs great strains on the material without changing its original dimensions. The alteration of microstructure through initial dislocation slip and the domination of mechanical twinning lead to the grain refinement in Ti materials. The refinement of grain develops the yield strength (YS), ultimate tensile strength (UTS), hardness, corrosion resistance, and biocompatibility of ECAPed Ti materials, which find wide usage in automobile, aerospace, and biomedical applications. This review mainly focused on the recent evolution of ECAP on the microstructural, mechanical, and biocompatibility behaviors of Ti-based materials.
Experimental Investigation and Optimization of Material Removal Rate and Tool Wear in the Machining of Aluminum-Boron Carbide (Al-B4C) Nanocomposite Using EDM Process
A. Arunnath, S. Madhu, Mebratu Tufa
Advances in Materials Science and Engineering, 2022
Electrical discharge machining (EDM) is a cost-effective unconventional machining method used for machining any composites materials. EDM is based on the thermoelectric energy between the electrode and workpiece. In this work, boron carbide particles of 50 nm (6 wt.%) are reinforced with aluminum 7075 (94 wt.%) prepared using stir casting method. The stir casting process is carried out at speed of 700–800 rev/min. The fabricated aluminum-boron carbide nanometal matrix composites are used as workpiece (anode); copper electrode is used as tool (cathode). This work investigates the influence of EDM process parameters such as current (I), pulse on-time (ton), and tool diameter (d) during machining of Al-B4C composite on metal removal rate (MRR) and tool wear rate (TWR). The design of experimental plan is executed by Taguchi approach, and the responses of each parameter are influenced by analysis of variances (ANOVA). Response table for average value of MRR and TWR shows that the current is the significant parameter affecting MRR and TWR. From this work, it was observed that material removal rate increased with increasing the current, and the tool wear rate decreases.
Optimization of process parameters in CNC turning process on machining SCM440 steel by uncoated carbide and TiCN/Al2O3/TiN coated carbide tool under dry conditions
A. Arunnath, P. Haja Syeddu Masooth
Materials Today Proceedings, 2020
Experimental investigations on machining performance of tungsten carbide (WC) by modification of wire-cut electric discharge machining work holding setup into turning process
P. Haja Syeddu Masooth, A. Arunnath
Materials Today Proceedings, 2020