Numerical Predictions Of The Mechanical Properties Of A356 Composites Fabricated By Powder Metallurgy

Nano-composite plastics and carbon nanotubes have been utilized for industrial and consumer packaging, the later offering an improved packaging solution for electronics components by making the materials used lighter and stronger. Nano-porous silica is a high porous, low-density solid material that supports various temperatures making it a great insulation product that can be applied in a wide range of fields from pipe insulation to refrigerators and even microelectronics. Nanoparticle based colloids are employed in the manufacturing of sunscreens, paints, and printer inks and nano-coatings can be applied in order to obtain scratch resistant surfaces. Composite nano-materials can be considered the basis for all the other current and future commercial applications of nanotechnology.

For each test sample, we designed 49 (7×7 array) different indent locations (Fig.9) with a spacing of 15μm. We could get 5 hardness and modulus values respectively for each location from one loading-unloading curve, and therefore 245 hardness and 245 modulus values totally for each sample. By averaging the hardness and modulus, the test results were summarized in Table. 4. Center region was the middle area of coating which was fully deposited with nanoparticles, while transition region is the edge of coating which was partially

My interests lie in the field of composite materials, their production and the various fabrication processes involved during composite manufacturing and their quality control. It is possible to meet diverse design requirements by using composite materials and it also provides significant weight reduction and a better strength to

Dynamic mechanical analysis showed that increasing fiber content provides an improvement in the rigidity of the composites. Cardanol modified resol reinforced nanoclay composite was prepared and mechanical properties of the final composites were improved by doping a 6 wt% of nanoclay in cardanol modified resol (CMR) into the epoxy matrix. The results show that a 15 wt% of CMR in epoxy is a most suitable ratio (Nguyen et al 2007).

However, the absence of plastic deformation does not mean that composites are brittle materials like monolithic ceramics. The heterogeneous nature of composites result in complex failure mechanisms which impart toughness. Fiber-reinforced materials have been found to produce durable, reliable structural components in countless applications. The unique characteristic of composite materials, especially anisotropy, require the use of special design

This report aims to analyse and discuss the results of carrying out tensile tests for two materials, in this case Mild Steel and Nylon. The purpose of this is to use the information generated to calculate Young’s Modulus, Yield Stress, Tensile Strength, and Percentage Elongation. These properties must be known before designing a product using the materials tested, because the anticipated behaviour of the material must be suitable for the design specification, with a margin left for safety.

The use of fiber reinforced composites materials as an alternative to traditional metal materials is becoming widespread. The main technological advantages of these materials are low weight, high specific strength and stiffness, environmental resistance and long life. Compared to metals, composites can be easily made by relatively low tooling cost. Polymer matrix reinforced by woven fabrics is probably the most commonly used form of composites in structural application such as aircrafts, boats, and automobiles

Aluminium (AL) alloy 6061 is one of the most extensively used of the 6000 series aluminium alloys. Among the various useful aluminium alloys, aluminium alloy 6061 is typically characterized by properties such as fluidity, cast ability, corrosion resistance and high strength-weight ratio. Aluminium-based alloy MMCs has received increasing attention in recent decades as engineering applications. This alloy has been commonly used as a base metal for MMCs reinforced with a variety of fibres, particles and whiskers. Tungsten carbide (WC) is approximately two times stiffer than steel, with a Young's modulus of approximately 550GPa, and is much denser than steel or titanium.

To improve the wear resistance and other mechanical properties of PMMA, cross-linked agents were incorporated in the chemical structure. (5) The three different types of artificial teeth currently available are acrylic, porcelain, and composite resin. Each of these artificial teeth has its advantages and disadvantages. The cross-linked high strength PMMA artificial teeth were more resistant to wear as compared to the conventional PMMA artificial teeth. (6) Studies comparing the wear resistance of Nanocomposite artificial teeth and four layered cross-linked acrylic PMMA artificial teeth show that Nanocomposite is more resistant to wear as compared to the cross-linked PMMA artificial teeth, but the difference is negligible in comparison to the cost of these teeth.

For example, the cold and hot rolled steel, 1095 steel and the aluminum alloy samples consisted of metallic bonds while the HDPE samples consisted of covalent bonds. Metallic bonds are generally good ductility, strength and electrical conductivity1. One specific characteristic of metallic bonds from other primary atomic bonds is that it joins a bulk of metal atoms together. Moreover, their valence electrons delocalize and form a sea of electrons by the donation of valence electrons of its electropositive atoms1. As the experiment confirmed, metallic bonds attractive forces and the bonding bulk of metal atoms give metals great strength. Moreover, its malleability and easy break of local bonds also make metallic bonds have good

This paper presents a comparison of mechanical properties of 17-4PH stainless steel parts built by selective laser melting (SLM) additive manufacturing process with the wrought 17-4PH stainless steel parts. The microstructure is analyzed using optical microscope and the mechanical properties are evaluated using tensile testing according to ASTM E8 standard. Overall, the SLM fabricated samples demonstrated superior tensile properties and the microstructure is strongly influenced by the SLM process. The SLM processed specimens showed higher ductility and ultimate tensile strength than wrought samples.

Alumina (〖Al〗_2 O_3) and Silicon Nitride (〖Si〗_3 N_4) are most commonly found in a ceramic cutting material. Their attributes differ for their own specific purpose, but they all have the same core characteristics. They all demonstrate elevated hardness, strength, and thermal conductivity. Thermal conductivity is one of the main advantages in using ceramics over other materials. Ceramics can withstand temperatures over 4000℉ in its operation, while Carbide can only reach 1600℉. Cutting materials at this heat allows for the material being cut to be softened, allowing for a smoother, easier pass. These high temperatures are unattainable for carbide tools because they exceed its melting point. Ideal-machining temperatures (e.g., 2200°F for nickel alloys) can be accommodated by

The uncompetitive qualities of the AM-fabricated metal parts limit the wide industrial applications of AM processes. The results from the proposed research will help to establish an efficient and effective process for additive manufacturing and remanufacturing of metal parts with significantly improved qualities. Specifically, the proposed research will provide an engineering solution to reduce or eliminate uncertainties and common defects in LENS additive manufacturing of metal materials by integrating ultrasonic vibration. Such solution will broaden the applications of AM processes in the major industries in the U.S. where metal materials are heavily used, including aerospace industry, medical instruments and implants industry, automobile industry, machine tool industry, etc. UV-A LENS innovates the AM industry (both AM manufacturer and AM service provider) and ultrasonic applicable industry. The successful completion of the proposed research can help

Abstract—Al2O3 reinforced Aluminium Matrix Composites give advanced mechanical & physical properties. They have voluminous applications in automobile, aerospace, defense, sports, electronics, bio-medical and other industrial fields. Various manufacturing techniques like stir casting, ultra-sonic assisted casting, compo-casting, powder metallurgy, liquid infiltration are used for the production of the aluminium matrix composites. These composites reveal advanced physical and mechanical properties like lower density, low coefficient of thermal expansion, good corrosion resistance, high tensile strength, high stiffness, high hardness and wear resistance. Our paper reviews the characterization of mechanical properties like tensile strength, hardness with production route of casting for aluminium matrix- Al2O3 composites. Al2O3 agglomeration along with the increasing volume percentage is still a challenging task in composites materials manufacturing. 0.5% by weight of pure magnesium powder is used as wetting agent. Process parameters are optimized for the stir casting process of aluminium composite. Tensile and hardness test microstructure study was performed to find the deviation from the aluminium alloy.

As new technology development in field of space research, missile and nuclear industries, very precise and complicated parts are required and demanded by these industries. New developments in material science taking place in manufacturing field to meet the new challenges. After World War II, many new materials and unconventional methods of forming difficult to machine metals have emerged which are being put to commercial use with time. The meaning of unconventional used in meaning of harden steel, metal matrix composites (MMC), composites, tungsten, etc., are not easily machined by conventional machining