Tungsten inert gas welding (TIG) is a widely used fusion welding process to produce a high quality of weld joint for the ferrous and nonferrous alloy with an esthetic weld bead. The limitation of this process is shallow penetration, which needs multi pass required for thick sections resulting in lower productivity. Activated tungsten inert gas (ATIG) welding process has revolutionized form of the TIG

In this study, the nanophase ZrCr2 intermetallic compound was produced by the mechanical alloying (MA) and subsequent heat treatment. The phase transformations, crystallite size, lattice strain, and stored energy were studied at different milling times. The results indicated that MA caused to form a nanocomposite of the Cr(Zr) and Zr(Cr) supersaturated solid solutions. After 32 h of milling, the stored

Much research has focused on residual stress detection, analysis and elimination for alloy materials. There is however limited work considering residual stress in gray cast iron materials (HT200, 250, 300, 350) which are commonly used in heavy machine tool components. Herein an experimental program is undertaken to quantify the influence of typical machine tool production processes (casting, treatments

Ultra-high molecular weight polyethylene (UHMWPE) is a highly used polymer in the medical field due to its properties such as good mechanical strength, high hardness, good chemical resistance, and excellent biocompatibility. UHMWPE is used for the manufacturing of acetabular cups in hip-joint implantation. For enhancing the life span and functionality of hip implants, the uniform fine surface finish

In this paper, the thread turning of aluminum 7075 aerospace alloy is studied using microtextured carbide cutting inserts. The main target of this research work is to optimize the parameters of microtextured tools using response surface methodology (RSM) in the thread turning process. To achieve this, microtextures were fabricated by laser micromachining on the rake surface of tools. The factors studied

Powder mixed-EDM is a newly emerging proposed manufacturing process which can simultaneously shape and coat the surface of conductive materials. Transformation of machined surface is occurred through melting and chemical reactions of the added powders, tools materials and dielectric fluid due to elevated temperature generation during the operation. Though the biomaterials such as titanium alloy, magnesium

As a non-traditional machining process, spark assisted chemical engraving (SACE) can machine hard, brittle, and non-conducting materials. The spark discharges on tool-electrode sidewall result in energy loss and overcut edges. A tool electrode covered with an insulating film on its sidewall is usually used to constrain the discharges to the tool-electrode end. However, not only the preparation of the

Electrical discharge machining (EDM) of high aspect ratio (AR) micro-holes on materials like Ti-6Al-4 V alloy is challenging. The ineffective removal of the machining by-products from and replenishment of fresh dielectric medium in the inter-electrode gap (IEG) limit the penetration depth. The approaches suggested in existing literature either complicate the EDM process or increase the operational

This article evaluates performance of wire-cut electrical discharge machining technique on Ti6Al4V alloy. Taguchi L16 experimental design is employed considering four cutting variables each at four different levels. Two sustainable performance measures viz., material removal rate (MRR) and surface roughness (SR) were investigated. Multiple response optimization (MRR and SR) was performed employing

This work presents the experimental study and optimizing the micro-drilling parameters on geometrical accuracy in micro-drilling on Inconel 800. The geometrical accuracy of the holes is incorporating circularity, overcut, hole damage factor, and taper ratio. In addition to that, material removal rate, machining time, and temperature are taken for study. Micro-holes, based on Taguchi orthogonal array

Manufacture of modern aircraft components involve production of high value near net-shape carbon fiber reinforced polymer (CFRP) parts, which requires drilling holes for rivets and bolts at acute inclinations. The study explores the surface morphology of the inclined holes (30 ͦ, 60 ͦ, and 90 ͦ) drilled in CFRP under cryogenic cooling using coated carbide tools. Inclined hole drilling performance was

Filling Friction Stir Welding (FFSW) is an FSW completing process, in which the exit-holes at the end of friction stir welded lines are filled by a rotational semi-consumable pin. In the present study, combined 7.5 mm thick AA5456 rolled plates (5 mm) and pipes (2.5 mm) were successfully welded and filled by FFSW using a semi-consumable similar pin (5456) and semi-consumable dissimilar pins (7075 and

An experimental investigation on the joining process of 6061 aluminum alloy and carbon fiber reinforced thermoplastics composite (CFRTP) has been carried out with swing laser. The application of the swing laser is beneficial to obtain a larger bonding area. The effects of scanning speed are investigated on the interface formation and fracture load of the hybrid joint. In addition, the formation mechanism

To solve the problem of multiphased commercial light emitting diodes, a series of new single-phased BaLaAlO4:Dy3+ nanophosphors emitting cool white light were successfully fabricated via an energy-efficient approach, namely, solution combustion. X-ray diffractometry and Rietveld refinement revealed orthorhombic phase purity with P 212121(19) space group. Agglomerated orthorhombic nanoparticles (30–50 nm)

Wire plus arc additive manufacturing (WAAM) pursues high deposition rates at the expense of large heat input and severe thermal damage to deposited layers. Aiming at simultaneous higher deposition rate and less thermal damage, this study proposes an external filler wire based gas metal arc additive manufacturing (EF-GMA-AM) technology in which an external filler wire is fed directly into the arc to

This article reviews advanced polishing, grinding and finishing processes for challenging manufacturing applications. The topics covered are machining of advanced alloys; machining of wafers; strengths of dies after machining; grinding and polishing for wafer level packages; hybrid finishing processes; magnetorheological finishing; cooling and lubrication; dental, implant and clinical applications;

Powder mixed-electro discharge machining (PM-EDM) is a new emerging trend in research on electro-thermal process that can simultaneously shape and deposit a coating on the surface of the workpiece. PM-EDM is a hybridized form of EDM in which metallic powders are amalgamated in dielectric liquid to enhance both the machined surface condition and machining performance. Migration of materials on the cutting

In manufacturing industries, industrial robots have been introduced for performing welding process to accommodate intelligent, flexible, and automate welding. It is essential to integrate sensors and welding process parameter modeling for achieving higher weld quality, productivity and reduced cycle time in robotic arc welding process. A new approach formed by combining fuzzy-regression with Enhanced

Carbon/epoxy and carbon/polyimide composites are, respectively, high-performance thermoset and thermoplastic polymer matrix composites being widely utilized in the modern industrial fields due to their superior mechanical/physical properties. However, there is no study available in the literature to differentiate the machining behaviors between these two types of composites. The present paper contributes

Nickel-Titanium (Nitinol) alloy is one of the shape memory alloys with potential applications in biomedical and aerospace industries. However, long-term deployment of nitinol-based alloys in fluid medium leads to corrosion. In an attempt to improve the corrosion resistance, electrochemical studies were performed on laser processed nitinol in the presence of simulated body fluid. Design of experiments

A new sintering method is developed for fabricating large, 3-dimensional, open-cell metal foam parts using milling or friction stir welding machines. Temperature and pressure required for sintering are achieved by plunging and moving a rotating tool against a sacrificial top sheet in the setup. Predefined tool paths are used to compress and sinter the powder mixture in a die cavity. In this paper,

Residual stresses are induced mainly due to the plastic deformation or heat generation during metal cutting process. Mechanical stresses are themselves dependent on machining forces while thermal stresses depend on the magnitude of the produced heat during cutting process. Laser-assisted machining is a process in which a controlled laser source is used to increase the local temperature in some parts

In the present research work, a predictive model of material removal rate (MRR) for a novel ultrasonic turning (UST) process was developed and analyzed. Experimentation was performed to examine the effect of UST process variables viz. workpiece rotation speed, tool diameter, abrasive size, concentration and power rating on MRR, tool wear rate (TWR), and surface roughness (SR) while turning of glass

The tool electrode feed rate (TEFR) is a parameter of vital importance for velocity-feed electrochemical discharge drilling (ECDD). The tool electrode will hit the workpiece and may even cause to crack if higher TEFR is used, while a lower TEFR will curtail the material etch rate. Hence, a comprehensive experimental study into the TEFR effects on the ECDD performance is presented. The top and bottom

Graphene and its derivatives, due to their extraordinary mechanical, thermal, and tribological properties, are extensively used to fabricate bulk graphene-based nanocomposites. On the other hand, magnesium alloys are lightweight and manifest excellent mechanical properties. In the present study, the hardness and compressive responses of Mg–3 wt%Al/xRGO (x = 0.1 wt% and 0.3 wt.%) nanocomposites at ambient

In this study, technological hybridization of three-dimensional printing technology and ultrasonic-assisted pressure-less sintering has been used for fabricating electrically conductive copper specimens. The influence of sintering and ultrasonic vibration parameters was studied on the electrical conductivity measurements. A step-shape long ultrasonic horn was designed to amplify the vibrations. The

Keyhole gas tungsten arc welding (K-GTAW) was applied to characterize the weld bead geometry in case of the 6 mm thick electrolytic tough pitch copper. Various conditions of welding speeds and preheating on the bead geometry were studied for its uniformity. Visual examination, macro bead dimensional analysis, microhardness profile across the transverse section, microstructural analyses were performed

A mulberry paper-based electromagnetic interference shielding material with screen-printing process was realized for high shielding effect and mechanical strength. With various film thickness of silver flakes achieved by controlling squeeze depth in the screen printer, the performance of the material was systematically investigated. By adaption of silver flakes on mulberry paper, the shielding effect

The in-situ TiB2/Al alloy composites are widely used in the aerospace industry due to excellent properties. Although TiB2/Al alloy composites have been investigated with regard to tool wear, surface defects and cutting force, chip formation is not widely covered but is crucial to understand the machinability. Therefore, milling experiments were conducted to research chip formation, evolution from continuous

Being an advancement of conventional honing method, Magneto-rheological Abrasive Honing (MRAH) process is one of the unconventional nano-finishing processes which has the capability of finishing the non-magnetic freeform surfaces with good material removal rate. The magneto-rheological effect imparted by the carbonyl iron particles (magnetic particles) along with abrasives introduced through carrier

Given the role of micro-nanostructures in producing superhydrophobic and icephobic surfaces and the importance of high-quality replication of these micro-nanostructures in direct replication processes, we evaluated the effect of processing parameters on the superhydrophobicity, icephobicity, and replication quality of silicone rubber surfaces created via micro-compression molding. Molding pressure

Fe–50Ni alloy is widely used for soft magnetic applications due to attractive magnetic properties. In this study, Fe–50Ni soft magnetic alloy was produced by powder injection molding. The influence of sintering parameters was investigated on the density, grain size, and magnetic properties. The injected parts were sintered at 1300–1375°C for 2–14 h with subsequent controlled slow cooling. It has found

An attempt has been made to investigate, dry and cryogenic broaching of AISI 4340 steel, which is predominantly used in turbine and gear manufacturing industries. The components in these industries employ broaching for mass production, and minimal deviations are the preliminary goal. A cryogenic broaching setup was developed to conduct the experiment in pull-type broaching machining cycle. In cryogenic

Ultrasonic surface shot peening (USSP) treatment was conducted on the WC-8Co composite. The effects of different USSP-treated time on surface roughness, microstructure, mechanical and corrosion resistance were investigated. The results show that continuous bombardment on the surface of WC-8Co cemented carbide induced by high kinetic energy particles during USSP makes the WC particles and Co phase broken

High Manganese steel ASTM A128 is a very hard metal and production of components using a conventional machining process is very difficult and also the quality of the products are not favorable for the efficient function. Wire Electrical Discharge Machining (WEDM) is an emanating approach in the non-conventional machining process to produce intricate products with more accurate and precise. The WEDM

The galvanized ultra-high-strength steels are prone to liquid metal embrittlement (LME) cracking during resistance spot welding (RSW), cracking is facilitated by the specific temperature and stress conditions on the steel surface. A two-dimensional electro-thermomechanical model was established to simulate the RSW of a galvanized Q&P980 steel, which was susceptible to LME. Temperature and stress histories

The present review elaborates about the complexity being associated with the intensification of Rotational Molding process. It is a technique used in the manufacturing of hollow stress-free plastic products. In recent years, as rotational molding process has gained popularity in various critical applications, a detailed study on this technique needs to be analyzed deliberately. For this reason, an

Nickel-based superalloys are considered as superior material due to their higher mechanical strength. However, it has poor tribological properties during continuous sliding condition. In this study, two various alloy powders, namely, NiCrFeMoNb and FeCrMoVC were deposited on nickel-based superalloy. Further, the produced layers were examined to expose their hardness, phase formation and microstructure

The study concerned with optimization of modulation-assisted drilling (MAD) operation for a difficult-to-cut material Ti6Al4 V was carried out via response surface method (RSM). Conventional drilling (CD) has been explored for comparison purposes. Experiments have been designed according to the Central Composite Design (CCD). The impact of machining input parameters on surface roughness (SR), machining

Metal Matrix Composites (MMC) reinforced by nanoparticles are competent materials, appropriate for functional and structural applications. Green manufacturing is a style for mechanized that minimizes dissipate and contamination. The pollution prevention resolves in manufacturing industries to expand and execute various environmentally-friendly strategies. The primary purpose of green machining is to

In the defense industry, UHMWPE is primarily used as ballistic material because of its light weight, superior mechanical properties, and particularly, its excellent strength-to-weight ratio compared to metal alloys. In this study, the influence of the AWJ process parameters on machining UHMWPE material is investigated. Several UHMWPE plates have been prepared for trimming, pocketing, and hole making

In today’s world, micro-manufacturing techniques are getting developed day by day to minimize the effort and sophistication to provide desired products. Micro forming is one of the micro-manufacturing techniques. Present research article reports on the bending of micron-thin sheets using an electric discharge machining process. The spark discharges were used to bend thin stainless steel work materials

The research presented here deals with laser micro engraving of silicon carbide material. For conducting the experiments considered laser parameters were current, pulse frequency and scan speed. The design of experiment was performed with the help of Taguchi orthogonal array. The significance of laser micro engraving variables on the MRR and mark width was studied. The result indiactes that the laser

This work aims to report the quality of the high contact ratio asymmetrical gear tooth manufactured through wire cut electrical discharge machining(WCEDM) process and static load capacity of the gear tooth. The effect of various process parameters such as peak current (IP), pulse on time (Ton), pulse off time (Toff) and servo voltage (SV) on the performance parameters such as Surface roughness (Ra)

ABSTRACT Since the 1980s, extensive archeological studies have provided us with knowledge about the multifaceted relations between Nuragic Sardinia and Bronze Age Cyprus. During the winter of 2019, Nuragic tableware of Sardinian origin was discovered at the harbor site of Hala Sultan Tekke, on the south-eastern coast of Cyprus, providing the opportunity to return to the question of the reasons behind

This paper presents the analytical data collected from the analyses of several cauldrons with cross-attachments, perhaps better known under the German name Kreuzattaschenkessel. The analyses seem to confirm the hypothesis that these distinctive artifacts had been produced in two different periods and areas and show different characteristics. The chronology of the vessels is still not defined with certainty