The authors have proposed a 3-5 GHz ultra-wideband (UWB) low power and low noise amplifier (LNA) with the TSMC 0.18 μm RF CMOS process, which uses a novel dual input matching network for wideband matching. We have used a current-reuse gm-boosted common-gate topology and shunt-shunt feedback common-source output buffer to improve gain and noise figure with low power dissipation. The proposed dual input

This article presents a study on crack mode classification in cementitious materials under uniaxial compression using gaussian mixture modeling (GMM) of acoustic emissions approach. To implement a retrofitting method to an in-service concrete structure, a prior knowledge about the type of crack developed in the concrete structure is useful. Because, occurrence of AE events during fracture process in

This paper studies the effect of various red mud proportions on the strength and microstructural changes in the ferrosialate geopolymer mortar. The optimum percentage of red mud (RM) has to be found with respect to the molarity of Sodium hydroxide (NaOH) to maintain the suitable alkalinity of the mixture for maximum strength gain. This percentage has been found to be between 20 and 30% RM proportions

Samples of directionally solidified Mg-9Zn-2Y alloys have been obtained using vacuum induced directional solidification equipment. The metallographic structures and mechanical properties at room and high temperatures of the directionally solidified alloys have been investigated and compared with those of conventional casting alloys. The structures have consisted of columnar crystals with a specific

In the present research work, the effects of Titanium (Ti) and Tungsten (W) addition on tribological behavior of powder metallurgy (P/M) Fe-1%C steel have been investigated. The test specimens of plain carbon steel and 1%Ti, 1%W and 1%Ti+1%W added plain carbon steels were used to conduct the wear tests and wear behavior analyses. The optical and SEM images of wear tracks and microstructures of the

The Ti-6Al-4V-4B4C composite coatings have been deposited on AISI 1040 steel substrates by magnetron sputtering. The composition, structure, and topography of the coated surface have been explained by SEM, XRD, FT-IR and AFM. The constant coating thicknesses of 80 nm and 115 nm obtained for 0.5 h and 1h coating time, respectively. Wear tests have been conducted on the coated AISI 1040 steel substrates

In the present investigation microwave energy has been utilized to develop wear resistant Ni-based clad without Nd2O3 (unmodified coating) and with addition of Nd2O3 (modified coatings) in varying wt. % of 1-3. The clads have been developed using domestic microwave oven at frequency of 2.45 GHz and power 900 W for duration of 360 s. The unmodified and modified clads have been characterized in terms

The aim of the work has been to analyze the aluminum alloys for plastic working from the point of view of their usefulness in the new hybrid manufacturing process which includes gravity casting and forging. The tests have been carried out on popular aluminum alloys from the 2xxx and 7xxx series: 2017A, 2024, 7022, and 7075, respectively. The authors have focused on the problem of using these materials

In this study, nano-sized SiC particles have been codeposited with nickel using an additive free sulfamate bath under pulsed direct current (PDC) and direct current (DC). In order to find the effect of current density, duty cycle (D.C.) and waveform on coating, coatings have been studied in terms of microstructure, microhardness and SiC-codeposition. The scanning electron microscope results shown that

Many engineering applications are in need of high strength and low weight alloys; titanium and aluminium alloys are used in several engineering applications to reduce weight. In this study, investigate effect of environment conditions on microstructure properties of gas tungsten arc welded assisted with brazing of titanium alloy Ti-6Al-4v and aluminium alloy Al7075 has been carried out. Alloys are

Fibre reinforced polymer (FRP) composites have been prone to damages such as delamination, debonding, matrix cracking and fibre breakage. In this paper, detailed study has been carried out on determining the presence of small delamination in sub layers of carbon fibre composite beam using various non-destructive tests (NDT) and vibration signal analysis. We have concluded that ultrasonic and X-Ray

Effects of adding 0.3 wt.% Al in Zn bath on the microstructure and reaction kinetics of intermetallic compounds have been studied using Co/Zn and Co/Zn-Al solid/liquid diffusion couples by means of scanning electron microscopy (SEM) and wave dispersive spectrometry (WDS). The intermetallic compounds in the Co-Zn interface have been identified and the diffusion process of Al in zinc bath has been analyzed

Constitutive equations describing the flow stress of Q235 steel undergoing hot plastic deformation have been developed by integrating the microstructure models and exponential flow stress models presented in literatures, in which the microstructure models parameters have been re-determined based on the related experiments carried out on cylindrical specimens of the Q235 steel. Therefore, the integrated

In contrast to the conventional methods of improving interface and performances of UHMWPE fiber composites through fibre surface modification, this paper has reported a novel approach to deposit graphene oxide (GO) to increase the fiber/matrix interfacial shear strength (IFSS) of ultra high molecular weight polyethylene fibers (UHMWPE fiber) reinforced high density polyethylene (HDPE) composites. To

The traditional turning process has used in this study to develop a mathematical model from experimental data to predict the surface roughness of titanium chrome-molybdenum (Ti-Cr-Mo) alloy when the workpiece is machined with cutting parameters i.e. spindle rotational speed, feed rate and depth of cut. In order to determine the contribution of the cutting parameters, the analysis of variance (ANOVA)

In this work, a comparative investigation of electric discharge machining (EDM) and electric discharge drilling (EDD) has been presented to evaluate the performance measures for machining blind holes in Al6063/10% SiC metal matrix composites (MMCs). The work has been conducted with an aim of optimizing the material removal rate (MRR), tool wear rate (TWR), and surface roughness (SR). The input parameters

Wire rope has examined for the total fatigue life prediction methodologies based on the initial condition of the wire rope. The great majority of applications, e.g. cranes, lifts, and winches have been subjected the rope to bending fatigue. There are several parameters which effects on bending fatigue lifetime such as tensile load, sheave diameter, rope composition. Apart from that, according to application

CF/POM/CNT ternary composites have been prepared by melt blending method with carbon nanotubes (CNT) as modifier, maleic anhydride (MAH) as interfacial compatibilizer and polyoxymethylene (POM) as matrix. The mechanical properties of CNT on CF/POM have been studied by temperature-controlled tensile, and scanning electron microscopy analysis. The results show that the interface properties of CF/ POM/CNT

Titanium alloys are ideally suited for different manufacturing applications because of their unique combination of high specific strength over a wide range of temperature, in addition to excellent corrosion resistance properties. However, grinding of titanium alloys is quite difficult due to their high hardness at elevated temperature, low thermal conductivity and elastic modulus. Application of cutting

Non-ferrous metals are difficult to weld as compared to the ferrous metals. Copper is one of the non-ferrous metals using worldwide in different manufacturing and other metal processing industries. This paper focuses on the processing of copper under friction stir welding (FSW) and the study of mechanical properties of friction stir welded (FSWed) copper joints. Different parameters of FSW have been

This work investigates the variation in material properties of steel upon friction stir processing through its magnetic response. The steel plate of grade IS 2062 having a thickness of 3 mm have been friction stir processed (FSPed) using a tool of tungsten carbide with a 15 mm shoulder diameter along with 3 mm pin diameter with traverse of 150 mm/minute and a 800 RPM revolving speed. Magnetic response

Turning operation is one of the most used operations at various industries and obtaining desired machined surface quality is one of the important concerns of researchers. In this investigation the effects of using copper oxide nano-fluid as compared with conventional fluid (soluble oil) as coolant and lubricant on surface integrity of machined surface of heat treated cold work tool steel (AISI O1)

This study investigates the microstructure and mechanical properties of Ti-6Al-4V brazed joints which has been performed in a vacuum furnace using BAg-22 (Ag–16Cu–23Zn–4.5Ni-7.5Mn, wt. %) as filler metal. The microstructure of the brazed joints has been analyzed by means of optical microscope, scanning electron microscope (SEM) and X-Ray diffraction (XRD). In addition, the mechanical strengths of the

Rivers are over exploited for natural sand extraction and production of cement has triggered global warming. For sustainable development a study has been conducted to use construction and demolition waste (CD-W) in cement-sand mortar. In the present study, crushed CD-W in the form of recycled concrete fine aggregate (RCFA) and recycled concrete powder (RCP) has been planned to be used in cement-sand

Welded joints of dissimilar metals are often required in nuclear and chemical industries. Among the various types of material combinations, welded joint of austenitic stainless steel and martensitic stainless steel is one good option. Due to differences in mechanical, metallurgical and corrosion properties between the two dissimilar materials, selections of suitable welding parameters, filler materials

Due to the expansion of the pipeline network in the transportation of petroleum and its derivatives, it has been essential to develop studies to evaluate and guarantee the safety condition, as well as the reliability of such facilities. Welded pipelines have been widely used, and they are susceptible to corrosion. Since the heating at the welded point may leads to structural and compositional modifications

Due to its particular properties, niobium has been widely used in the industry. In order to produce niobium-base parts, its powder can be obtained through a powder metallurgy’s method called ball milling. In this article, the ball milling parameters, in the production of niobium’s powder,have been optimized using the Taguchi’s method in order to obtain a high yield in the process, considering a particle

Machining performances are strongly influenced by vibration which occurs due to the dynamic nature of machine tool structures. A self excited vibration commonly known as chatter is frequent debacle occurs during milling operations which cause worsening outcomes such as excessive tool wear, poor surface finish and reduced tool life. In this paper an effort has been tried to optimize the machining and

An electrochemical micro machining (ECMM) set-up has been developed and utilized for experiments. The effects of ECMM parameters on material removal rate and electrode wear rate have been analyzed during micro drilling of hybrid Al/(Al2O3p+SiCp+Cp)-MMC with tungsten electrode of diameter 298 µm. The machined surface texture, and decomposition of metallic compounds deposited on the workpiece as well

In the present paper, sliding wear characteristics of seven weight% yttria stabilized zirconia (7YSZ) sol-gel deposited on to air plasma sprayed CoNiCrAlY bond-coated Inconel 800 superalloy has been studied. For this, sliding wear tests have performed on pin-on-disc friction and wear test rig by varying experimental parameters applied load, sliding velocity, disc speed and temperature as per L16 orthogonal

In this work, powder compact tool electrode prepared with TiC-Cu powder mixture has been used to deposit TiC coating on AISI 304 stainless steel by electro discharge coating (EDC) process. Effects of peak current during EDC process have been analysed for the deposition rate, surface characteristics and micro-hardness value of the coating. Morphology of the deposited coating layers has been studied

The aim of this study is to investigate wear and microstructure properties of CrFeNiMoTi high entropy alloy coating produced by using tungsten inert gas (TIG) process on the medium carbon steel. The coatings have been compared in terms of their phase composition, microstructure, and hardness. Phase compound and microstructure of coating layers have been examined by using X-ray diffractometer (XRD)

In this paper, the drilling behavior of a new class of composite materials has been experimentally investigated. The composite laminates have been manufactured using glass fibers, epoxy resin, and filler materials. The abundantly available agro-based waste materials (coconut coir, rice husk, and wheat husk) have been used as filler materials. The drilling experiments have been performed at several

In the present study, a systematic methodology has been presented to determine optimal injection molding conditions for minimizing warpage and shrinkage in a thin wall relay part using modified particle swarm algorithm (MPSO). Polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) have been injected in thin wall relay component under different processing parameters: melt temperature

The surface of the carbon fiber (CF) has been pretreated by liquid phase deposition of microcrystalline cellulose (MCC). X-ray photoelectron spectroscopy, atomic force microscopy (AFM) and scanning electron microscopy (SEM) have been used to analyze and characterize the surface morphology and structure of carbon fiber, and the shear strength test and SEM observation of single fiber interface have been

Mechanical properties of banana macro particles reinforced epoxy composites have been evaluated in this study. Composites have been prepared with 25, 30, and 35 wt % of banana macro particles using compression moulding machine. Mechanical properties (tensile, flexural, and impact) of banana macro particles reinforced epoxy composites have been obtained as a function of content of banana macro particles

The present study aims to multi factor optimization for preparation of aluminum matrix composites (AMC) by reinforcement of SiC/ Al2O3/ Al2O3+ SiC particles having dual particle size (DPS) and triplicate particle size (TPS) based upon signal to noise (S/N) ratio analysis. In this work the amalgamation of fused deposition modelling (FDM) and vacuum moulding (V-process) assisted stir casting (SC) has

The current research investigates the effect of electric discharge machining (EDM) and material parameters on material removal rate (MRR), tool wear rate (TWR) and surface roughness (Ra) while machining the novel aluminium rock dust composite. Experiments have been performed in Vidyunt EM 150 EDM machine by considering parameters namely discharge current, pulse ON time, pulse OFF time, reinforcement

The aluminium composites are being used for various number of applications like automobiles, aerospace, marine, construction, etc. Manufacturing industries keenly focus on improving their product quality by means of strength with reduction in cost. The hybrid metal matrix composites paved way for achieving those objectives through reinforcement of existing traditional materials. This work is also a

The preparation and properties of latex modified concrete (LMC), nano silica modified concrete (nSMC) and silica-latex modified concrete (SLMC) have been investigated in this study. Properties like compressive strength, tensile strength, flexural strength, thermal characteristics and water absorption have been evaluated. The 7-day compressive strength has increased 37% (30.15 N/mm2) after the inclusion

In this paper, a decagonal geometry has been designed for liquid sensing. The liquid analytes that are sensed are ethanol, benzene and water as they are the most used analytes in the chemical and biological industries. Firstly, a decagonal structure has been designed and neff and sensitivity of this structure has been calculated. Then, the core structure has been modified and decagonal, octagonal and

Effect of ultra-fine structure obtained by surface mechanical attrition treatment(SMAT) on microstructure, yield strength (YS), ultimate tensile strength (UTS) and microhardness of hypoeuctectoid steel have been studied in this paper. Surface alteration has been obtained by vibratory SMAT equipment with particular parameters for similar class of material. The SMAT has been carried out for different

Morphology tuning is one of the innovative techniques to overcome challenges of a pristine graphitic carbon nitride (g-C3N4) as a photocatalyst. In this study, a unique pipe-like C3N4 have been fabricated using a facile, environmentally friendly and scalable approach by treating dicyandiamide (DCDA) with ethylene glycol and nitric acid. The pipe-like C3N4 samples have been possessed unique structural

Dry sliding wear behaviour of aluminium matrix composites (AMCs) prepared by stir casting with 4% as fly ash reinforcement has been studied in the work. Dry sliding wear tests have been conducted using a pin-on-disc wear-testing machine to study the effect of changeable process parameters such as load, time, and sliding velocity, which have been used as design variables on the output parameters wear

Despite having significant role to measure the forces in tillage, medical and various diagnostic studies, force dynamometers are extensively employed in cutting-force monitoring and measurement. In this paper, an investigation of various cutting-force measuring dynamometers based on characteristics and design has been carried out. Characteristic based investigation helps in deciding about various important

The method of carbon fiber reinforced polymer (CFRP) strengthening is a technique that is rapidly developed and used for strengthening of steel structures in recent years. Most previous research in the area of CFRP strengthening of steel structures has been conducted on the behavior of flawless steel structures. Based on the author's knowledge, the behavior of CFRP-strengthened deficient square hollow

An approach has been made in this work to analyze sensitivity drift in a Pd decorated SnO2 sensor developed for detection of linalool, a significant aroma compound in tea.  Prior to the drift analysis, an attempt has been made to choose the optimum loading percentage of Pd in SnO2 for linalool sensing.  An inexpensive and simplistic hydrothermal method has been used to develop five different Pd decorated

Frequently, black sand from coastal deposits is a magnetic ore with a complex structure that is composed principally by iron, titanium and silica oxides, and metals such as vanadium, chromium, nickel, strontium, etc. This material could be used in oxidation/reduction processes as a photocatalyst doped naturally. However, its surface area low and the mass transfer constraints caused by the cluster formation

In the present work, the AISI 4150 steel has been pack-borided in the temperature range of 1123-1273 K for a treatment time of 2 to 8 h. The mixture of powders containing 20% B4C, 10% KBF4 and 70% SiC has been used for producing a single boride layer (Fe2B) at the surface of AISI 4150 steel. The presence of Fe2B phase has been confirmed by XRD analysis. The SEM observations have been done to investigate

The present study investigates the influence of adding multi-wall carbon nanotube (MWCNT) into the dielectric fluid of electric discharge machining (EDM) in terms of material removal rate (MRR), surface roughness (SR) and surface topology of EN-31 die steel using Cu electrode. A customized rotary electrode set-up has been developed to compare the performance improvement of powder mixed rotary electrical

In this research work, brake pad friction composite materials based on binary and ternary combinations of ceramic-organic fibres have been realized, following evaluation of braking performance parameters on Krauss friction testing machine adopting ECE R-90 regulations and PVW-32 standard test protocol. The obtained experimental performance data has been further used for the assessment of performance

This report focuses on fabrication, characterization, and fundamental optical, structural and thermal properties of PVA/calcium aluminum doped zirconate (CaAl2ZrO6) nanocomposites (NCs) films. The PVA-NCs with different amounts viz., 2, 4, 6 and 8 wt% of calcium aluminum zirconate (CaAl2ZrO6) have been fabricated using solvent casting technique. The NC films structural and morphology have been investigated

Rapid prototyping (RP) have been attracting attention in the manufacturing community because of their capability to reduce the lead time of product development. Present work is an effort to understand the influence of process variables like infill pattern, layer thickness, build orientation and infill density on dimensional accuracy (DA), flatness and cylindricity. Taguchi method orthogonal array L9

Debonding failures are a common problem in concrete bridge decks strengthened with adhesively attached carbon-fibre reinforced polymer (CFRP) strips. Accordingly, in this study, rectangular concrete slabs strengthened with CFRP have been experimentally evaluated to simulate the strengthening of T-beam and box girder slabs. The resulting static load data have been used to compare the effects of four

The conventional hydrothermal process for the synthesis of zinc oxide (ZnO) nanostructures has been a slow process and provides less control in terms of shape, size and nucleation time. Whereas, synthesis through microwave heating takes only a few minutes to produce high quality, ultra-pure zinc oxide nanostructures. In this study, we have presented a protocol to fabricate various ZnO nanostructures

The micro-structural parameters such as reinforcement shape, size, distribution, volume fraction, property mismatch, aging condition, bonding strength, and whisker orientation can influence the fatigue life of discontinuous reinforced metal matrix composites (DRMMCs). The strengthening effect plays a vital role in predicting the fatigue behaviour of DRMMCs. The modified shear lag (MSL) and enhance

Ductile fracture, such as micro-cavities and micro-voids, inevitably exist and evolve under tensile stress state in metal forming. Ductile fracture sways the mechanical performance of 52100 bearing steel. It is necessary to investigate the influences of strain rate and deformation temperature on both ductile fracture and microstructure evolution. Uniaxial hot tension tests were performed, in which

Owing to the complexity of grinding process, it has been very difficult to predict the optimal machining conditions which have been resulted in smooth surface finish, accurate geometric measurements and higher production rate. In this work, empirical models for surface roughness, roundness error and metal removal rate have been developed based on regression analysis. These models have been associated

The microstructure, fracture morphology and tensile fracture process of high manganese steel with single-phase austenite after water toughening have been investigated by optical microscope (OM), scanning electron microscope (SEM) and transmission election microscope (TEM). The results have shown a large number of deformation twins forming within the austenite matrix after tensile fracture, which have

In this study, laser remelting has been performed on the Metal Inert Gas welded (MIG) low carbon mild steel at varying laser power inputs (400 W & 600 W). To investigate the influence of laser remelting on the joint properties, optical microscope observation, scanning electron microscope observation, microhardness measurement and mechanical tests have been conducted. The experimental results revealed