Addressing Bioprinting Challenges in Tissue Engineering
Synthesis of Zinc Oxide Nanoflower using Egg Shell Membrane as Template
In Vitro and in Vivo Experiment of Antibacterial Silver Nanoparticle-Functionalized Bone Grafting Replacements
Biocompatibility in Orthopedic Implants: Advancements and Challenges
Contemporary Approaches towards Emerging Visual Prosthesis Technologies
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
The emergence of carbon nanotubes has brought to light their extraordinary attributes, including remarkable strength, exceptional stiffness, low density, and structural integrity at the nanoscale. These characteristics have ignited enthusiasm for a wide range of technological applications. In the past decade, our comprehension of carbon nanotube mechanics has evolved through a combination of experimental validation, challenging theoretical predictions, and the application of diverse computer simulation techniques. This research endeavors to delve into theoretical predictions concerning the visualization and manipulation of minute structures, with a primary focus on scrutinizing the mechanical characteristics of single-walled carbon nanotubes. The study specifically investigates parameters such as Young's modulus, Poisson's ratio, shear modulus, and buckling criteria across various configurations of these nanotubes. The modeling approach incorporates beam elements to symbolize covalent bonds between Carbon-Carbon (C-C) atoms in Carbon Nanotubes (CNTs). Operational within a continuum mechanics framework, the paper aims to predict the characteristics of these beam elements. Baseline values for C-C bond properties are established through numerical analysis to facilitate simulations. Utilizing a finite element methodology, the paper comprehensively examines the mechanical behavior of carbon nanotubes. Furthermore, a parametric investigation is conducted to evaluate how the diameter of single-walled carbon nanotubes influences shear modulus and buckling loads.
The objective of this study is to assess the most suitable aluminum hybrid metal matrix composite through mechanical and physical characterizations utilizing the Entropy-VIKOR optimization method. To appraise the optimal composite, aluminum hybrid metal matrix composites were manufactured following the L18 Taguchi orthogonal array, which was designed by considering three levels of matrix materials, two levels of hybrid reinforcements, and three levels of weight percent of reinforcements. The production of Aluminum Hybrid Metal Matrix Composites (AHMMCs) was conducted using the stir casting process under optimal conditions and subjected to testing for mechanical and physical characterization, including hardness, tensile strength, porosity, and density. These characterizations were examined using the Entropy-VIKOR method to determine the optimum AHMMC. Ultimately, the Entropy-VIKOR optimization outcomes revealed that a 9% silicon carbide with flyash-reinforced AA5083 composite emerged as the optimal AHMMC material concerning its mechanical and physical characteristics. Finally, microstructural studies were carried out on the optimal AHMMC using a Scanning Electron Microscope (SEM) to assess the uniformity of particle distribution in the matrix. The SEM results demonstrated the uniform dispersion of reinforcement particles with no voids.
This study investigated the effect of tin (0, 6, and 9 wt%) and aging time (0, 16, 24, and 32 hrs) on the microstructure and mechanical properties of the AZ80-1.2RE Mg alloy. The results obtained indicate that the addition of Sn improved the mechanical properties. For the AZ80-1.2RE alloy, upon Sn addition, strength of 195 MPa and percentage elongation of 7.6 are observed to be found at 6 wt% Sn, which is attributed to the precipitates of Al2RE, Mg2Sn, and Mg-Sn-RE phases. After heat treatment and aging, the properties of the casted alloys were found to be affected. As aging time increases, small precipitates are observed to be dissolved in primary Mg phase, due to which the properties are found to be decreased from the as-cast condition to aging at 16 hours. The strength of the 6wt% Sn alloy decreased due to the high stress concentration at the large precipitate site during aging from 16 hours to 24 hours and then increased due to the grain boundary strengthening effect at the 32-hour aging time.
Ductile cast iron is similar to a composite structure with a metal matrix, and graphite nodules are considered additive particles inside the structure. The qualitative and quantitative analysis was done for hot-rolled ductile cast iron as a composite structure with graphite nodules as a reinforced element. The analysis was done at different hot rolling conditions and different cooling rates. The shape and graphite nodule distribution in the matrix were evaluated quantitatively using different parameters such as shape factor, volume fraction, mean free path, and graphite particles per unit length and per unit area. The directionality resulting from rolling was taken into consideration, so the measurements were done in the longitudinal and transverse directions. The measurements related to the matrix, such as grain size, number of grains per unit area, and intergranular surface ratio, were evaluated in the transverse and longitudinal directions as well. The difference between the structure on the surface attached to the rolling mill and the structure inside the samples was determined. This work aims to study the applications of hot-rolled ductile cast iron in building elements based on structure, which affects properties.
Sea to space applications necessitate advanced materials to fulfill diverse requirements, including Titanium and its alloys, particularly Grade 5 (Ti-6Al-4V alloy). Exhibiting remarkable properties such as high heat resistance, low thermal conductivity, low weight ratio, and minimal corrosiveness, Titanium Grade 5 holds immense potential for applications in aerospace, biomedical, automotive, and military sectors. However, its full utilization is impeded by challenges encountered during machining. This paper provides an overview of the difficulties faced in machining Titanium Grade 5 and emphasizes the ongoing search for the optimal tool-material combination. The paper discusses the properties influencing machinability, such as thermal conductivity, chemical reactivity, elastic modulus, hardness, strength, work hardening, and the effects of temperature on Ti-6Al-4V alloy. The review emphasizes the various techniques employed to enhance machining efficiency, including dry cutting, flood cooling, minimum quantity lubrication, high-pressure coolant environment, cryogenic environment, solid lubricants, and hot machining. While the best pairing remains elusive, significant progress has been made in the machining of titanium alloys, showcasing various evolving techniques and methodologies aimed at enhancing the material's usability in diverse industrial applications.
