Advanced Manufacturing
Processing of bulk nanomaterials
Metal Forming
51
Scopus Publications
1188
Scholar Citations
17
Scholar h-index
27
Scholar i10-index
Scopus Publications
Optimisation of Parameters for Abrasive Water Jet Machining of Aluminium 7075 Alloys using Taguchi Method C. Sravanthi, S. Gajanana, A. Krishnaiah, Ch. Venkateswarlu International Journal of Vehicle Structures and Systems, 2026 This research focuses on the experimentation of Abrasive Water Jet Machining (AWJM) applied to aluminium (Al) 7075 alloys. Three critical AWJM parameters - water jet pressure (WJP), stand-off distance (SOD) and traverse speed (TS) were systematically varied across three levels in a series of experiments designed using Taguchi's L9 orthogonal array. For effective machining by AWJM, the process parameters are optimised, specifically assessing their influence on material removal rate (MRR). The methodology employed is Taguchi's method and subsequent is applied. The optimal combination as WJP of 3800 bar, SOD of 2mm and TS of 80.21mm/min was identified through the Analysis of Variance (ANOVA). Notably, the ANOVA indicated that TS played a significantly impactful role, contributing to 76.85% of the observed outcomes. Post-AWJM, Scanning Electron Microscopy (SEM) analysis was conducted, unveiling the presence of distinct features indicating an increase in the MRR. The developed mathematical model for MRR demonstrated a close correspondence between predicted response outcomes and the experimental findings. To validate the identified optimal parameter levels of AWJM, a confirmation test was conducted, affirming the robustness of the settings arrived.
Mathematical modelling and optimization of cutting conditions in turning operation on MDN 350 steel with carbide inserts Syed Adil, A. Krishnaiah, D. Srinivas Rao Journal of Alloys and Metallurgical Systems, 2025 Hard metals are victorious in offering greater functional life in various critical applications because of their excellent material characteristics. But due to their high hardness, they pose machining problems. Therefore, the current work is intended to identify suitable cutting conditions for machining of hard metal components by carrying out turning experiments.MDN 350 steel is considered as the subject hard metal in the present work, as the literature on machining experiments on the aforementioned metal is limited and there is a wide scope of research for improving its machining performance. The current methodology can be implemented for other hard metals as well. Improvement of tool life, enhancement of rate of production, reduction in cost of production and closeness of surface finish to that of grinding are the major goals of the work. The experimental work is divided into two sets wherein in the first set, the cutting inputs are speed and tool feed rate and the experimental output is flank-wear. Cost of production, tool life and rate of production are the machining performance indicators considered for the first set, which are evaluated based on flank-wear data and empirical formulae. In the second set, rake angle, cutting angle and nose radius of the tool insert are varied and roughness of the machined components is measured. The machining performance indicators of the first set are optimized using graphical method of contour plots . Artificial neural networks technique, which is well known for its versatility to model linear as well as non-linear data, is used to express the surface roughness as a function of tool geometrical variables. Genetic Algorithm , which is an advanced optimization technique known for its intricate search for optimal solutions, is used for optimizing surface roughness with optimal combination of the geometrical parameters. The optimum results of the two sets are confirmed through experimental validation and the deviations are found within 10 %.
Mechanical, microstructure and machining characteristics of alloying elements optimized Al 7075 alloy modified with reinforcement- Silicon Carbide C. Sravanthi, S. Gajanana, A. Krishnaiah, Ch. Venkateswarlu Advances in Materials and Processing Technologies, 2025 In this study, the Al7075 alloy underwent modifications in its primary alloying components (Cu, Mg, Cr, and Zn) and incorporated a unique additive, SiC, to investigate their collective impact on mechanical, microstructural, and machining behavior. The goal was to enhance load-bearing and machining properties of the commercial Al-7075 alloy. Employing the stir casting process, the alloy was modified with varying weight percentages of Cu (1.2–4.8%), Mg (2.1–2.9%), Cr (0.18–0.28%), and Zn (5.1–6.1%) using an L8 orthogonal array. SiC was then added at 2%, 4%, and 8 wt% to the optimized composition. Results indicated that the composite with 4.8% Cu, 2.9% Mg, 0.18% Cr, and 5.1% Zn (Al7) exhibited maximum tensile strength and hardness. Al1 alloy displayed the highest energy absorption at 2.1J. Al7 alloy demonstrated superior wear resistance but with a higher wear rate of 0.320 mm3/min and a COF of 0.58. Microstructural analysis revealed finer grains and increased grain boundaries. The addition of SiC significantly enhanced tensile strength, hardness, impact toughness, and wear resistance as 223.56MPa, 118.6BHN, 1.14J and 0.127 mm3/Nm respectively, making it suitable for applications in industries such as aircraft, automotive, and defense where precise weight is crucial.
Computational Fluid Dynamic Analysis of Missile at Various Mach Numbers Raghavender V, Ramana S.V, Krishnaiah A Ssrg International Journal of Mechanical Engineering, 2024 - The study conducted using Computational Fluid Dynamics (CFD), a missile serves several important objectives that contribute to the design, performance evaluation, and optimization of the missile. CFD simulations help assess the missile's aerodynamic behavior in various flight conditions. This includes analyzing lift, drag, and stability characteristics, which are crucial for achieving accurate trajectory predictions and target accuracy. By analyzing the flow patterns around the missile's surface, it can identify areas of high drag. Engineers can then modify the missile's geometry to reduce drag, resulting in improved fuel efficiency, longer range, and better maneuverability. The simulations enable the examination of how the missile's control surfaces affect its stability and maneuverability. This information is crucial for ensuring the missile can accurately follow its intended trajectory and perform any necessary mid-flight adjustments. Understanding the aerodynamic forces and thermal loads on the missile's structure helps assess its structural integrity. It can predict potential failure points and guide structural design improvements. Overall, the analysis of missiles plays a pivotal role in ensuring their effectiveness, accuracy, and safety. It helps engineers to understand complex fluid dynamics phenomena and their interactions with missile components, guiding the design process toward optimal solutions.
Preparation, characterization and densification studies of W-Ag nanocomposites produced by chemical route M. Venkat Reddy, A. Krishnaiah, P. Venkateshwar Reddy Low Carbon Materials and Green Construction, 2023 W-Ag has applications in a wide range of cutting-edge fields, counting heat sinks and microwave absorbers for micro—electronic components, electric arc ends, and filaments for welding processes, electrical contacts, and durable electronic connections. Chemical methods provide a number of benefits, including improved purity, and controlled particle size. The present study focused on the fabrication of W-Ag nano composites using chemical synthesis. W-Ag nanocomposites with average size less than 50 nm were synthesized using Tungsten hexacarbonyl (W(CO)6, and silver acetate (CH3-COOAg) as metal precursors in the present study. The W-Ag composites were sintered using conventional sintering. X-ray diffraction studies of as-prepared powders showed amorphous W-phase and FCC Ag, while sintered W-Ag composites exhibited crystalline BCC W and FCC Ag phase. The effect of sintering temperature on relative density and mechanical properties of W-Ag sintered compacts was investigated. Relative density in excess of 97.6%, 98.2% and 98.8% was achieved for W-20.3 wt.% Ag, W-30.1 wt.% Ag and W-39.8 wt.% Ag composites on conventional sintering at 1000°C for 1 h. Vickers hardness of 364 ± 10 and 320 ± 8 Hv and 279 ± 6 were achieved for W-20.3 wt.% Ag, W-30.1 wt.% Ag and W-39.8 wt.% Ag composite compacts respectively. The hardness value of W-Ag composites decreased with an increase in Ag content. The combination of properties realized in this study renders the composites suitable for automotive and heat sink applications.
Evaluation of Bronze Electrode in Electrical Discharge Coating Process for Copper Coating JagadeeswaraRao Maddu, Buschaiah Karrolla, Riyaaz Uddien Shaik, Hassan Elahi, Krishnaiah Arkanti Micromachines, 2023 One of the widely used non-traditional machines for machining of hard materials into complex shapes and different sizes is the electrical discharge machine (EDM). Recently, the EDM has been used for deposition by controlling the input parameters (current and duty cycle). This work was carried out to evaluate the readily available bronze (88% Cu + 12% Sn) electrode for deposition of copper material on titanium alloy. Experiments were conducted according to Taguchi experimental design considering the input parameters of current, Ton, Toff and preheating temperature of substrates. Titanium alloy was further hardened by preheating at temperatures of 100 °C, 300 °C and 500 °C and quenching in brine, castor oil and vegetable oil in order to avoid workpiece erosion. After this treatment, hardness, grain area, grain diameter and number of grains were characterized to compare with pretreated substrates. Then, the treated substrates were taken for copper deposition with the EDM. Output parameters such as material deposition rate (MDR), electrode wear rate (EWR), coating thickness (CT), elemental composition and surface crack density (SCD) were found. Material characterization was carried out using a scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDX) and optical microscopy. Output parameters were optimized with technique for order of preference by similarity to ideal solution (TOPSIS) to find optimum parameters. A sixth experiment with parameter values of Ton of 440 µs, Toff of 200 µs, preheating temperature of 300 °C and quenching medium of castor oil was optimum with MDR of 0.00506 g/m, EWR of 0.00462 g/m, CT of 40.2 µm and SCD 19.4 × 107 µm2.
Development of Regression Model for Surface Roughness on Al 6061 Alloy Lecture Notes in Engineering and Computer Science, 2021
Development of advanced methodology for generating reduced-order models of linear sub circuits International Journal of Mechanical Engineering and Technology, 2018
Model reduction of CFD simulation of integrated circuit cooling of an electronics packaging International Journal of Mechanical Engineering and Technology, 2018
Optimization of sand mould type and melting parameters to reduce porosity in Al-Si alloy castings Leonardo Electronic Journal of Practices and Technologies, 2016
Finite element and experimental analyses of repetitive bending and straightening of commercially pure copper Reviews on Advanced Materials Science, 2011
Optimisation of Parameters for Abrasive Water Jet Machining of Aluminium 7075 Alloys using Taguchi Method. C Sravanthi, S Gajanana, A Krishnaiah, C Venkateswarlu International Journal of Vehicle Structures & Systems (IJVSS) 18 (1), 62 , 2026 2026
Mathematical modelling and optimization of cutting conditions in turning operation on MDN 350 steel with carbide inserts S Adil, A Krishnaiah, DS Rao Journal of Alloys and Metallurgical Systems 9, 100161 , 2025 2025 Citations: 1
COMPARATIVE ANALYSIS AND OPTIMIZATION OF FRICTION STIR WELDING PARAMETERS FOR AA6351 ALUMINUM ALLOY: AN APPROACH USING AgNO3 NANO COATINGS TV Kumar, PVRR Reddy, A Krishnaiah International Journal of Engineering Research and Science & Technology 21 (1 … , 2025 2025
FRICTION STIR WELDING PARAMETERS FOR AA6351 ALUMINUM ALLOY USING AgNO3 NANO COATINGS: A COMPARATIVE ANALYSIS TV Kumar, PVRR Reddy, A Krishnaiah Cuestiones de Fisioterapia 54 (3), 2633-2650 , 2025 2025
Mechanical, microstructure and machining characteristics of alloying elements optimized Al 7075 alloy modified with reinforcement-Silicon Carbide C Sravanthi, S Gajanana, A Krishnaiah, C Venkateswarlu Advances in Materials and Processing Technologies 11 (1), 523-543 , 2025 2025 Citations: 11
Friction Stir Welding of Polypropylene and Its Tooling: A Review V Jaipal Reddy, A Rajasekhar, A Krishnaiah International Conference on Intelligent Manufacturing and Energy … , 2024 2024
Mechanical, microstructure and machining characteristics of alloying elements optimized Al 7075 alloy modified with reinforcement- Silicon Carbide C Sravanthi, C. , Gajanana, S. , Krishnaiah, A. , Venkateswarlu Advances in Materials and Processing Technologies , 2024 2024
Mathematical Modelling and Optimization of Tool Geometry to Machine Hard Metals Using PCBN Inserts S Adil, A Krishnaiah, DS Rao Second International Conference on Emerging Trends in Engineering (ICETE … , 2023 2023 Citations: 1
Optimization of Process Parameters on Forming Force for Incremental Forming of SS316 A Chandrakanth, A Krishnaiah Second International Conference on Emerging Trends in Engineering (ICETE … , 2023 2023 Citations: 1
Preparation, characterization and densification studies of W-Ag nanocomposites produced by chemical route MV Reddy, A Krishnaiah, P Venkateshwar Reddy Low-carbon Materials and Green Construction 1 (1), 20 , 2023 2023
Machining improvement on MDN 350 alloy with optimum machining parameters S Adil, A Krishnaiah, DS Rao ADVANCEMENTS IN AEROMECHANICAL MATERIALS FOR MANUFACTURING: ICAAMM-2021 2492 … , 2023 2023 Citations: 1
Densification and microstructure studies of Mo-30–40 wt% Cu nanocomposites prepared through chemical route TKN M. VenkatReddy, Prasanta Kumar Sahoo, A.Krishnaiah, P.Ghosal Journal of Alloys and Compounds 941 (168740) , 2023 2023 Citations: 21
Densification and microstructure studies of Mo-30–40 wt% Cu nanocomposites prepared through chemical route TK Reddy, M.V. , Sahoo, P.K. , Krishnaiah, A. , Ghosal, P. , Nandy Journal of Alloys and Compounds 941, 168740 , 2023 2023
Densification and microstructure studies of Mo-30–40 wt% Cu nanocomposites prepared through chemical route TKN M. Venkat Reddy, Prasanta Kumar Sahoo, A. Krishnaiah, P. Ghosal Journal of Alloys and Compounds 931, 168740 , 2023 2023
Evaluation of bronze electrode in electrical discharge coating process for copper coating JR Maddu, B Karrolla, RU Shaik, H Elahi, K Arkanti Micromachines 14 (1), 136 , 2023 2023 Citations: 11
INVESTIGATING THE INFLUENCE OF PROCESS PARAMETERS ON THE PRECISION MACHINING OF SQUARE HOLES FOR INDUSTRIAL APPLICATIONS L Radhakrishna, AS Kumar, A Krishnaiah triangle 17 (02) , 2023 2023
Study on influence of process parameters in hot rolling of al 7178 metal matrix materials B Ravikumar, S Gajanana, A Krishnaiah, M Nagarjuna, K Rammadhav Manufacturing Technology Today 21 (5-6), 3-14 , 2022 2022
Effect Of Al2O3& Tib2 Reinforcement Particles On Tribological And Tensile Properties Of Al 6061 Alloy Surface Composite Via Friction Stir Processing. E Sadanandam, NV Srinivasulu, A Krishnaiah, A Devraju International Journal of Mechanical Engineering , 2022 2022
Numerical Simulations and Experimental Studies on the Formability of Drawing Quality Steel in Single Point Incremental Forming Z Yeshiwas, A Krishnaiah Journal of Mechanical Engineering 18 (1), 137-156 , 2021 2021
Effect of tool material on mechanical properties of friction stir welded dissimilar aluminium joints G Mrudula, P Bhargavi, A Krishnaiah Materials Today: Proceedings 38, 3306-3313 , 2021 2021 Citations: 6
MOST CITED SCHOLAR PUBLICATIONS
Production of ultrafine grain sizes in aluminium sheets by severe plastic deformation using the technique of groove pressing A Krishnaiah, U Chakkingal, P Venugopal Scripta Materialia 52 (12), 1229-1233 , 2005 2005 Citations: 195
Applicability of the groove pressing technique for grain refinement in commercial purity copper A Krishnaiah, U Chakkingal, P Venugopal Materials Science and Engineering: A 410, 337-340 , 2005 2005 Citations: 167
Effect of shotpeening on sliding wear and tensile behavior of titanium implant alloys BKC Ganesh, W Sha, N Ramanaiah, A Krishnaiah Materials & Design (1980-2015) 56, 480-486 , 2013 2013 Citations: 115
Severe plastic deformation and strain localization in groove pressing SC Yoon, A Krishnaiah, U Chakkingal, HS Kim Computational Materials Science 43 (4), 641-645 , 2008 2008 Citations: 113
Parametric optimization in wire electrical discharge machining of titanium alloy using response surface methodology SP Arikatla, KT Mannan, A Krishnaiah Materials Today: Proceedings 4 (2), 1434-1441 , 2017 2017 Citations: 67
Surface integrity characteristics in wire electrical discharge machining of titanium alloy during main cut and trim cuts SP Arikatla, KT Mannan, A Krishnaiah Materials Today: Proceedings 4 (2), 1500-1509 , 2017 2017 Citations: 38
Investigation on the influence of EDM parameters on machining characteristics for AISI 304 K Buschaiah, M JagadeeswaraRao, A Krishnaiah Materials Today: Proceedings 5 (2), 3648-3656 , 2018 2018 Citations: 35
Finite Element Analysis of Rotary-die Equal Channel Angular Pressing SC Yoon, MH Seo, A Krishnaiah, HS Kim Materials Science & Engineering A 490 (1-2), 289-292 , 2008 2008 Citations: 32
Experimental investigation to produce thin-walled sand casting using combination of casting simulation and additive manufacturing techniques MV Mohiuddin, SF Hussainy, A Krishnaiah, P Laxminarayana The International Journal of Advanced Manufacturing Technology 90 (9), 3147-3157 , 2017 2017 Citations: 25
Coupled analysis of heat transfer and deformation in equal channel angular pressing of Al and steel P Quang, A Krishnaiah, SI Hong, HS Kim Materials transactions 50 (1), 40-43 , 2009 2009 Citations: 23
Densification and microstructure studies of Mo-30–40 wt% Cu nanocomposites prepared through chemical route TKN M. VenkatReddy, Prasanta Kumar Sahoo, A.Krishnaiah, P.Ghosal Journal of Alloys and Compounds 941 (168740) , 2023 2023 Citations: 21
Flow behaviour kinetics of Inconel 600 superalloy under hot deformation using gleeble 3800 Y Gajalappa, A Krishnaiah, KB Kumar, KK Saxena, P Goyal Materials Today: Proceedings 45, 5320-5322 , 2021 2021 Citations: 21
Influence of Sand Moulding Process Parameter on Product Quality of Al-Si Alloy casting–An ANOVA Approach V Mohiuddin, A Krishnaiah, F Hussainy International Journal of Advanced Research in Science and Engineering 2 (4 … , 2015 2015 Citations: 21
Comparison of microstructure and mechanical properties of friction stir welding of Al 6082 aluminum alloy with different tool profiles PK Thimmaraju, K Arkanti, GCM Reddy, KBG Tilak Materials Today: Proceedings 3 (10), 4173-4181 , 2016 2016 Citations: 20
Experimental study of sand mold process parameters on Al-alloy sand castings using DoE MV Mohiuddin, SF Hussainy, A Krishnaiah, P Laxminarayana, ... IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) 11 (6), 01-06 , 2014 2014 Citations: 18
Advances in Simulation, Product Design and Development: Proceedings of AIMTDR 2018 MS Shunmugam, M Kanthababu Springer Nature , 2019 2019 Citations: 17
A practical approach to eliminate defects in gravity die cast al-alloy casting using simulation software SF Hussainy, MV Mohiuddin, P Laxminarayana, A Krishnaiah, ... International Journal of Research in Engineering and Technology 4 (1), 114-123 , 2015 2015 Citations: 17
Mechanical properties of commercially pure aluminium subjected to repetitive bending and straightening process A Krishnaiah, U Chakkingal, HS Kim Transactions of the Indian Institute of Metals 61 (2), 165-167 , 2008 2008 Citations: 16
Numerical Simulation and Experimental Validation of Thickness Distribution in Single Point Incremental Forming for Drawing Quality Steel Z Yeshiwas, A Krishnaiah International Journal of Applied Engineering Research 15 (1), 101-107 , 2020 2020 Citations: 14
Performance Evaluation of Machine Tool Probe for In-process Inspection of 2D and 3D Geometries C Achelker, NS Rao, R Rajendra, A Krishaniah International Journal of Proceedia Technology 14, 244–251. , 2014 2014 Citations: 14