Avanish Kumar Dubey

Avanish Kumar Dubey
Motilal Nehru National Institute of Technology | MNNIT · Department of Mechanical Engineering

PhD

About

82
Publications
13,001
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Introduction
Dr. Avanish Kumar Dubey currently works as Professor in Department of Mechanical Engineering, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004 (India). His area of research is Advanced Manufacturing Processes, Laser Material Processing, Micro and Hybrid Machining Processes and Machining of Advanced Materials.
Additional affiliations
May 2009 - present
Motilal Nehru National Institute of Technology
Position
  • Professor (Full)

Publications

Publications (82)
Article
Shape memory alloys are a distinct family of alloys recognized for their unique features, such as extreme anti-fatigue, exceptional specific strength, corrosion resistance, biocompatibility, and pseudo-elasticity. Due to strain-hardening effects displayed by the latter during a conventional machining process, these features make shape memory alloys...
Article
Friction stir welding (FSW) is purposely established to overcome difficulties present in fusion welding methods of Al alloys. But FSW reduces the tool life due to high wear and plunging force during plunging stage of tool. Laser assisted friction stir welding (LAFSW) is a new hybrid welding approach that can reduce tool wear and plunging force by p...
Book
This book presents the select proceedings of the International Conference on Advances in Sustainable Technologies (ICAST 2020), organized by Lovely Professional University, Punjab, India. This book caters to the industrial and production engineering aspects. It covers the industrial and production engineering areas such as sustainable manufacturing...
Article
Lightweight with excellent strength of magnesium alloys has attracted its use in transportation industries but difficulty in fusion welding of magnesium alloys restricts its application. The present research investigates solid state friction stir welding of dissimilar AZ31-AZ91 magnesium alloys with aim to achieve optimum quality welds. Surface rou...
Article
The high reactive nature of magnesium alloys impose restriction during fusion welding and make it difficult to fabricate. Due to inherent characteristics, solid-state friction stir welding may be a suitable option for joining these alloys. But welding of dissimilar alloys is again a difficult task. This study suggests significance of different weld...
Chapter
Magnesium alloys are advance and very attractive materials for sustainable development of automobile industries. Fusion welding of these alloys hinders the application due to the presence of chemically active elements in their compositions. In current research work, AZ91-AZ31 alloys are welded at fixed processing parameters (580 rpm RotS and 55 mm/...
Chapter
Laser surface alloying is one of the techniques to create high entropy alloy (HEA). HEAs are multi-element solid solution alloys stabilized due to high mixing entropy. These alloys are superior compared to the existing materials used in combustion engines, gas turbine components, and medical implants. The dilution percent is one of the important pa...
Chapter
Zirconia toughened alumina (ZTA) is employed to make components for aerospace, chemical, biomedical and cutting tool industries due to its excellent hardness, fracture toughness and strength. Improved properties of ZTA make it difficult-to-cut ceramic composite. Achieving a better surface quality in machining of ceramic composites has been very cha...
Article
Electric Discharge Machining (EDM) is the most accepted non-contact machining process for machining of newly developed materials, but due to its poor machining quality and productivity, numerous researchers are working hard to modify the machining quality of EDM by using the hybridisation concept. This work is focused on the indigenous development...
Article
Now a day’s researchers are working hard to improve the process performance of unconventional or advanced machining processes by hybridising them with other mechanisms. In the present research, a hybrid variant of electrical discharge machining (EDM) has been proposed by developing a setup to create a rotating magnetic field near the machining zone...
Article
Magnesium alloys are lightweight structural material with attractive specific strength and require joining of different pieces in many industrial applications. Due to their low melting temperature, chemically active elements and high thermal expansion these alloys are difficult-to-weld by conventional welding techniques. Friction Stir Welding has f...
Article
Full-text available
Laser surface alloying (LSA) is one of the strategies to make a high-entropy alloy (HEA). HEAs are multi-component solid solutions balanced out through high mixing entropy. These alloys have shown superior properties compared to current materials utilized in combustion engines, gas turbine segments, and clinical inserts. An extensive literature rev...
Article
AA7075 alloy and AZ31 alloy are light weight structural materials which have high specific strength, but weldability of these alloys are poor which restrict their applications. In the present work, joining performance of dissimilar AA7075 alloy and AZ31 alloy in butt configuration have been evaluated by Friction Stir Welding at different operating...
Article
Ceramic composite like Zirconia Toughened Alumina (ZTA) acquire with excellent toughness, high hardness and temperature resistance. These characteristics demand applications in manufacturing of ballistic body parts, cutting tool inserts, turbine blades and combustion chambers. Conventional machining methods are unsuitable to drill/cut holes in ZTA...
Article
Full-text available
Nickel-based titanium, a shape-memory alloy (SMA), is gaining popularity for use in different applications. Machining of these SMAs shows various challenges through conventional machining. Henceforth, in the current study, the wire-electric discharge process has been attempted to machine nickel-titanium (Ni54.1Ti) super-elastic SMA. NiTi’s effectiv...
Article
Application of Hybrid Metal Matrix Composites (HMMCs) are restricted in the advanced manufacturing industries such as aerospace and automobile because of machining challenges due to its superior mechanical properties. Hybrid machining processes (HMP) have become more popular to fabricate complex shapes and intricate profiles of MMCs and other advan...
Article
Laser surface alloying is a material processing technique to modify a surface utilizing the laser beam's thermal energy. Laser surface alloying is a non-linear process and depends on many input process parameters. Literature suggests laser power, scan speed, and powder feed rate are important parameters for material processing using laser surface a...
Chapter
Micro-Electrochemical Grinding (ECG) is a process that produces a component with dimensions in the range of tens of nanometers to few millimeters. In this process, the material is removed by both electrochemical and abrasive action in a small interelectrode gap. Components produced by the micro-ECG process have found application in the electronics...
Chapter
Friction stir welding was developed to primarily join the aluminium alloys, but it causes thermal stresses because of thermal cycle and constraints (mechanical) during the process. Thus, reduces the life of components. Aluminium alloy AA 6061-T6 is highly demanded in transportation industries and many times requires the joining of two pieces. In th...
Chapter
This work provides a numerical analysis of the heat affected zone and material removal rate for shape memory alloys (SMAs) through wire electric discharge machining (WEDM). A finite element method computer program was created using MATLAB. SMAs are widely used in many areas like aerospace, biomedical and automobile due to their unique properties, s...
Article
Magnetic Force-assisted Powder-mixed Electric Discharge Machining (MFPEDM) is a combination of two separate hybridizing methods of the EDM process, one of these the magnetic field develop near the machining area by mounting the magnet by which improves the expulsion of molten metal from the workpiece during machining and other one is the improvemen...
Article
Magnesium alloys are advanced and very attractive materials in terms of their high specific strength and toughness, and light weight. Performance of fusion welded joint of magnesium alloys is not very good because of presence of chemically active elements. This work represents, the welding characteristics of dissimilar AZ91 and AZ31 magnesium alloy...
Article
Research has emphasized to a good amount in the field of alloys and MMC Materials that can be machined by Advance Machining Processes, EDM (Electric Discharge Machining) is one of the most suitable and globally accepted unconventional machining methods which used in machining of all challenging newer electrically conducting materials. This work is...
Article
Due to better alloying characteristics, high-entropy alloys may result in superior surface properties. The present paper investigates the microhardness and erosion behavior of laser surface alloyed AlxCu0.5FeNiTi high-entropy alloy on aluminum alloy (AA1050) substrate. The effects of laser power, scan speed, and powder feed rate on microhardness an...
Article
Laser cladding and surface alloying are surface modification techniques employed to fabricate thin coating/layer with improved surface properties or to refurbish surface defects by forming highly resistant gradient coatings/layers on the substrate. High energy density and cooling rates make these techniques suitable to process a wide range of mater...
Article
High entropy alloy possesses superior properties such as high hardness, wear-resistance, thermally stable, high strength to weight ratio, etc. required in industries. The development of high entropy alloy is critical due to the high segregation possibilities of multi-component systems. Processing of high entropy alloy can be done using laser surfac...
Article
AZ91 and AZ31 Mg alloys are used for lightweight structures with excellent specific strength. Fusion welding of Mg alloys is not suitable due to its high affinity towards oxygen. The present research investigates joining performance of AZ91 and AZ31 using indigenously developed friction stir welding set-up at different welding and rotational speed....
Conference Paper
In present research work, friction stir welding of armour grade aluminium alloy, which is having excellent strength to weight ratio, has been done at low heat input rate (rotational speed of 600 rpm, travelling speed of 75 mm/min) and tool tilt angle of 2.5°. Tungsten carbide tool with a shoulder diameter of 15 mm was used to produce the joint. Ten...
Article
Full-text available
A high-entropy alloy (HEA) is a multi-component solid solution alloy stabilized by high entropy of mixing. These alloys are demanded in com¬bustion engines, gas turbine components, and medical implants. Lack of fusion and the presence of pores are the main problems in the processing of HEA using the laser surface alloying process. This paper invest...
Article
Full-text available
To develop the hard surfaces of superalloys usually, laser surface modification is employed. Out of several laser surface modification techniques, the laser cladding process allows obtaining sound surface clads. Laser Cladding being a complex process depends on many input parameters. Knowledge of these input parameters during laser cladding is esse...
Conference Paper
Full-text available
Laser surface alloying is one of the techniques to create High Entropy Alloy (HEA). HEAs are multi-element solid solution alloys stabilized due to high mixing entropy. These alloys are superior compared to the existing materials used in combustion engines, gas turbine components, and medical implants. The dilution percent is one of the important pa...
Conference Paper
Full-text available
Laser surface alloying is one of the techniques to create high entropy alloy (HEA). HEAs are multi element solid solution alloys stabilized through high mixing entropy. These alloys are superior compared to the existing materials used in combustion engines, gas turbine components and medical implants. The geometry of laser surface alloyed bead can...
Article
Full-text available
Zirconia-toughened alumina (ZTA) has promising characteristics to be used for combustion chambers, pump, heat exchanger, armor, bearings, cutting tool inserts, aerospace, and nuclear parts. But it has limited applications due to its adverse machining characteristics. Laser machining has been proven to machine difficult-to-cut-materials with certain...
Article
Zirconia Toughened Alumina (ZTA) ceramic is used to make distinct components of aerospace, military and biomedical industries which require suitable machining method free of mechanical forces. Recent researchers reveal that Laser Beam Machining has diverse potential to overcome machining difficulty of structural ceramics. But to enhance the durabil...
Article
Full-text available
The Yttria Stabilized Zirconia ceramic is extensively used in aerospace, automotives, medical and microelectronics industries. These applications demand manufacturing of different macro and micro features with close tolerances in this material. To make miniature holes with accurate dimensions in advanced ceramics such as Yttria Stabilized Zirconia...
Conference Paper
Full-text available
Ti6Al4V is one of the most widely used commercially available titanium alloys. Laser welding of Ti6Al4V is a major issue in the industries related to automotive and aerospace due to its reactivity towards atmospheric gases at higher temperature which cause severe embrittlement. The work presented in this paper is mainly focused on numerical investi...
Article
Laser drilling has become an alternative to drilling precise holes in advanced difficult-to-cut superalloys. Due to better hole quality and capability to generate macro-size holes, laser trepan drilling is becoming more popular as compared with laser percussion drilling. This paper presents a study of laser trepan drilling process performance in te...
Article
It has been found that wheel wear rate (WWR) and surface finish is adversely affected in order to improve the material removal rate (MRR) in electrical discharge diamond grinding (EDDG) process. Therefore, simultaneous optimisation of above three responses is always desired. This research paper presents the modelling and multi-objective optimisatio...
Article
The poor hole quality in laser percussion drilling necessitates the use of laser trepan drilling for cutting small holes in conventionally difficult to cut materials. Inconel 718, a Ni-based superalloy is a widely used aerospace material but difficult to cut by conventional methods. This paper investigates laser trepan drilling of Inconel 718 with...
Conference Paper
Drilling micro holes in Yttria Stabilized Zirconia (YSZ) by conventional machining process have drawbacks such as workpiece fracture, tool wear, high cost, low surface integrity, time consuming, also not safe for operator. To overcome these problems laser drilling is suitable to drill micro holes in YSZ because of its nonconductive nature. In laser...
Article
Titanium and its alloys are extensively used materials in aerospace industry due to their remarkable metallurgical and mechanical characteristics; however, superior mechanical properties, poor thermal conductivity and higher chemical affinity of titanium alloys make them difficult-to-cut by conventional machining methods. The present research inves...
Article
The high wheel wear rate (WWR) is one of the limiting factors during electrical discharge abrasive grinding (EDAG) of ferrous alloys using diamond abrasive. High WWR may adversely affect the material removal rate (MRR) during EDAG. In the present research, the performance of cubic boron nitride (CBN) abrasive has been explored during EDAG of high s...
Article
Full-text available
The study represents a hybrid approach of artificial neural network (ANN) and genetic algorithm (GA) for modeling and optimization of hole taper during laser trepan drilling (LTD) of 1.4 mm thick titanium alloy (Grade-5) sheet. A feed forward ANN model to predict the hole taper more precisely then a second order regression model, has been developed...
Article
Full-text available
Due to thermal nature of laser cutting, high temperature and thermal stresses are developed at the cut edge that affects finally the cut edge quality. This paper aims for developing a numerical simulation model to predict the temperature and residual stresses in the laser cutting of Aluminium alloy (Al-2024).The temperature and stress fields develo...
Article
Drilling of small-diameter holes meeting stringent quality standards in superalloys such as Inconel718 (having widespread applications in aeroengine component manufacturing) has always been a challenging task. Laser drilling has wide applications in the aerospace industry. Laser trepan drilling (LTD) provides better control over the drilled hole ge...
Article
Electrical discharge machining is one of the widely used noncontact-type advanced machining processes in which material removal takes place due to melting and vaporization by thermal energy of electric sparks. Electrical discharge machining has the capability of machining difficult-to-cut materials such as superalloys, advanced ceramics, and compos...
Data
Full-text available
Laser Beam Cutting has capability to cut intricate profiles in difficult-to-cut sheet metals like ceramics, composites and superalloys. Nickel-based superalloy sheets in general, and SUPERNI 718 sheet in particular, are used as casing for jet engines, aero engine, turbine blades, turbo charger, pump bodies, and parts .For optimal setting of differe...
Article
Today's fast growing sheet metal industries are demanding overall improvement in cut quality rather than improving different quality characteristics individually. The laser cutting has proven to be the quality cutting process for almost any category of materials with few limitations. The multiple quality characteristics may be improved by controlli...
Article
Duralumin is an alloy of aluminium which has some unique properties such as high strength to weight ratio, high resistance to corrosion, light in weight, and more demanding alloy in various sectors such as space craft, marine, chemical industries, construction and automobile. These applications require very precise and complex shapes which may not...
Article
Machining of metal matrix composites (MMCs) has been a big challenge for manufacturing industries due to its superior mechanical properties. Unconventional machining methods have become an alternative to give desired shapes with intricate profiles and stringent design requirements. The present research investigates the grinding performance of coppe...
Article
Laser cutting is an advanced thermal cutting process of complex nature. It's process behavior drastically changes with slight variation in processing conditions. The prediction of process performance becomes more difficult if cutting materials have non-favorable optical and thermal properties. Titanium (Ti) alloys are characterized by their low the...
Article
The grinding of metal matrix composites (MMCs) is very difficult by conventional techniques due to its improved mechanical properties. It often results in poor surface quality (surface damage) in the form of surface cracks/residual stresses and requires frequent truing and dressing due to clogging of the grinding wheel. The electric discharge diamo...
Article
This paper presents experimental study of laser cutting of Aluminium alloy sheet with the aim to optimize multiple quality characteristics such as cut edge surface roughness and kerf deviation, simultaneously. The Taguchi method combined with Grey relational analysis has been used for parameter optimization. The Principal component analysis and ent...
Article
Full-text available
Laser cutting of titanium and its alloys is difficult due to it’s poor thermal conductivity and chemical reactivity at elevated temperatures. But demand of these materials in different advanced industries such as aircraft, automobile and space research, require accurate geometry with high surface quality. The present research investigates the laser...
Article
Full-text available
The laser trepan drilling (LTD) has proven to produce better quality holes in advanced materials as compared with laser percussion drilling (LPD). But due to thermal nature of LTD process, it is rarely possible to completely remove the undesirable effects such as recast layer, heat affected zone and micro cracks. In order to improve the hole qualit...
Article
Artificial intelligence techniques have proven to be the better tool for modelling and optimisation of processes having complex nature and non-linear behaviour. It has been found that the hybrid approach of two individual tools may even perform more efficiently. The present paper proposes a computer aided hybrid approach of neural network and genet...
Article
Titanium and its alloys have high demand in different industries due to their superior properties. The conventional cutting methods face difficulties for cutting these alloys due to their poor thermal conductivity, low elastic modulus and high chemical affinity at elevated temperatures. Laser cutting may be used for quality cuts by proper control o...
Article
Being a thermal energy-based advanced cutting process, the capability of laser beam cutting depends mainly on optical and thermal properties of materials to be cut rather than mechanical properties. Highly reflective and thermally conductive sheetmetals are known as difficult-to-laser-cut materials. This paper presents an experimental approach to i...
Conference Paper
Metal matrix composites (MMCs) have wide applications in modern manufacturing industries due to their specific and improved technological characteristics such as high strength to weight ratio, high hardness, high thermal, corrosion and wear resistances. Such characteristics are highly demanded in automobile, aircraft and space research organization...
Article
Capability of laser cutting mainly depends on optical and thermal properties of work material. Highly reflective and thermally conductive Duralumin sheets are difficult-to-laser-cut. Application of Duralumin sheets in aeronautic and automotive industries due to its high strength to weight ratio demand narrow and complex cuts with high geometrical a...
Article
This paper investigates the laser cutting performance of 1 mm Duralumin sheet with the aim to improve quality of cut by simultaneously optimising multiple performances such as cut edge surface roughness, kerf taper and kerf width. The experimental data obtained by Taguchi methodology-based L27 orthogonal array experimentation have been used in the...
Article
Laser Beam Cutting (LBC) being a complex cutting process needs a reliable model for prediction of the process performance. This research work presents a modeling study of LBC process. A hybrid approach of Artificial Neural Network (ANN) and Fuzzy Logic (FL) has been used for developing the Kerf width model. The developed Neuro Fuzzy model of Kerf w...
Article
Full-text available
Advanced structural ceramics such as Silicon Carbide and Silicon Nitride have high demand in technologically advanced industries due to their improved properties such as high strength at elevated temperature, resistance to chemical degradation, wear resistance and low density. Since these ceramics are used in various engineering applications, it is...
Article
The application of laser beam for precise cutting of sheet metals, in general, and reflective sheet metals, like aluminium, in particular, has become of interest in the recent past. The optimum choice of the cutting parameters is essential for the economic and efficient cutting of difficult to cut materials with laser beams. In this paper, a robust...
Article
In laser beam cutting (LBC) process, the cut quality is of great importance. The quality of laser cut kerf mainly depends on appropriate selection of process parameters. Uniform kerf with minimum kerf width is of today's demand. It has been found that the kerf width during LBC is not uniform along the length of cut and the unevenness is more in cas...
Article
Laser beam machining (LBM) is one of the most widely used thermal energy based non-contact type advance machining process which can be applied for almost whole range of materials. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. It is suitable for geometrically complex profile cutting and making mini...
Article
This paper presents a hybrid Taguchi method and response surface method (TMRSM) for the multi-response optimisation of a laser beam cutting process. The approach first uses the Taguchi quality loss function to find the optimum level of input cutting parameters such as assist gas pressure, pulse width, pulse frequency and cutting speed. The optimum...
Article
Laser cutting of nickel-based superalloy sheets, having wide applications in aircraft and rocket industries, is important from the quality of cut point of view. Keeping this in view, a hybrid approach of Taguchi method (TM) and principal component analysis (PCA) has been applied for multi-objective optimization (MOO) of pulsed Nd:YAG laser beam cut...
Article
Since last four decades laser beams are being used in various manufacturing processes. CO2 and Nd:YAG lasers are most widely used in machining of engineering materials. In recent years the researchers have explored the number of ways to improve the quality of cutting, drilling and micromachining of different materials (metals, alloys, ceramics and...
Article
Taguchi methods have been used for a long time to improve the product quality and process performance of a manufacturing system. Few researchers have applied this methodology in laser beam cutting (LBC) of sheet metals and found the considerable improvement in cut qualities. In all experimental investigations of LBC so far, the objective was to opt...

Projects

Projects (4)
Project
Presently working on 'Laser manufacturing of Advanced materials and hybrid machining processes.