Evaluation of the Function of Adhesive Tissue Paper made with Starch Paste for Paper Conservation and Restoration
A Study on Morphology and Performance of Polylactic Acid (PLA) Membranes with Tween 60
Gel Polymer Electrolyte Characterization Based on PAN-NH4CF3SO4 and Nano ZrO2
Synthesis of Heme Like Iron (III) Water Soluble Complex
Study of Biodegradable Materials in Consumer Products
An Investigation on Recent Trends in Metamaterial Types and its Applications
A Review on Plasma Ion Nitriding (PIN) Process
A Review on Friction and Wear Behaviors of Brake’s Friction Materials
Comparative Parabolic Rate Constant and Coating Properties of Nickel, Cobalt, Iron and Metal Oxide Based Coating: A Review
Electro-Chemical Discharge Machining- A review and Case study
Electrical Properties of Nanocomposite Polymer Gels based on PMMA-DMA/DMC-LiCLO2 -SiO2
Comparison Of Composite Proton Conducting Polymer Gel Electrolytes Containing Weak Aromatic Acids
Enhancement in Electrical Properties of PEO Based Nano-Composite Gel Electrolytes
Effect of Donor Number of Plasticizers on Conductivity of Polymer Electrolytes Containing NH4F
PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3
Fireside corrosion of boiler tubes in bio medical waste incinerator plants has been of great concern for plant operators, boiler designers, and boiler tube manufacturers since quite a few number of boiler tubes in these plants suffered from wall thinning due to hot corrosion. The corrosion problem at high temperature is more serious due to the highly aggressive environment in bio medical waste incinerator plants such as Cl , HCl, alkali metals and heavy metals. 2 Corrosion resistant coatings are the key technologies to reduce the maintenance in bio medical incinerator plants by reducing the hot corrosion problem. Different corrosion resistant coatings processes have been developed such as thermal spray, HVOF, HVSFS, PVD and cold spray. Employing the corrosion resistant coatings ensure the high corrosion and wear resistant of the boiler tubes. This paper highlights the hot corrosion in bio medical incinerator plants, its effects and its protection with corrosion resistant coatings. Cold spray coatings have been reviewed with the aim of summarizing their high temperature corrosion resistance properties.
The riding comfort of an automobile is greatly affected by the suspension system. Springs are crucial suspension elements, necessary to minimize the vertical vibrations, impacts and pumps due to road irregularities, vertical vibrations and impacts are buffered by variations is the spring deflection so that the potential energy is stored in spring as strain energy and then released slowly. Composite leaf spring made of Eglass/Epoxy is the best alternate to steel spring for having excellent higher strength-to-weight ratio, high energy spring capacity, excellent corrosion resistance and higher natural frequency.In the present paper, shape optimization of mono composite leaf spring was carried out with design constraints as stress and displacements. Through finite element technique, structural parameters are computed for both steel and optimized composite leaf springs. Experimental validations were done on steel and composite leaf spring for both static and dynamic conditions. The dynamic analysis is computed through Fast Fourier Transform (FFT) and MATLAB code is developed to determine the natural frequencies of the leaf springs. Composite leaf spring is found to have low deflections, less stress, weight, high natural frequency and high damping property compared to steel leaf springs. This results in fuel savings and better riding comfort in automobiles.
Coatings are always considered to improve the thermal, chemical and mechanical properties of the materials. Cold spray is one of the upcoming technologies for coatings. In this study NiCrAlY coatings were successfully deposited on Superni 76, Superni 600 and Superfer 800H superalloys (Midhani grade) for hot corrosion protection. The characterization of the cold sprayed coatings have been studied using the combined techniques of, optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDAX). The deposited coatings found were dense with a porosity less than 1% and micro hardness of the order of 582- 670 Hv. XRD and EDAX analysis show Ni as the major phase in as-sprayed coating. Coating was found free from oxides.
Response surface methodology is used to model Friction Stir Welding (FSW) for the prediction of % elongation of AA 5083.The applications of friction stir welding are in aerospace, railways and space craft. The control factors of the process are tool rotational speed, welding speed, shoulder diameter and tool pin profile. Planning of experiments was carried using central composite design. The Analysis Of Variance (ANOVA) is used for the prediction of significant control factors along with their percentage contribution. The predicted optimized (minimum % elongation) setting of FSW control factors are tool rotational speed of 3966.23 rpm, a welding speed of 34.91 mm/min, and 19.89 mm shoulder diameter with trapezoidal pin profile. From this research it is found that the trapezoidal pin profile tool has the best effect on percentage elongation as compared to other pin profiles.
This paper summarizes some of the major aspects of precision ultrasonic thickness gauging. Ultrasonic NonDestructive Testing (NDT) characterizing material thickness, integrity, or other physical properties by means of high-frequency sound waves has become a widely used technique for quality control. In thickness gauging, ultrasonic techniques permit quick and reliable measurement of thickness without requiring access to both sides of a part. During the thickness measurement of any corroded plate, the reading of ultrasonic equipment gives many different readings for each time of inspection at same position due to their non uniform surfaces. Due to corrosion of metal piece, a material whose thickness is lower than the low limit of the probe causes measurement errors. Sometimes the displayed reading is twice as big as the actual thickness. To prevent these errors, the critical thin materials should be measured repeatedly for verification. This paper looks at the review causes of poor performance with ultrasonic techniques and suggests some methods to improve the situation.