Stainless steel is an inoxydable which means it can’t be readily oxidized (incapable of rusting). Stainless steel is notable because of its good corrosion resistance. Increase in Chromium content increases the corrosion resistance in stainless steels. Stainless steels are differing from carbon steels because of chromium content present in it. When compared with stainless steel, carbon steels are readily rusted when reveal to the combination of moisture and air.
The second specimen was AA 5052, which had low strength, but high ductility. The last specimen used was AA 6061, which has moderate strength and is highly resistant to corrosion. Procedure: To test each specimen, a tension test machine was used. Three specimens were tested: AA 2024, AA 5052, and AA 6061. The machine was set to 0 the force before the specimen was set into the machine.
After completion of the solubility tests, the appropriate solvent, cyclohexane, was selected for large-scale recrystallization. The unknown was weighed for the large-scale recrystallization then the same process was repeated to test the solubility. The solute dissolved after adding of about 60 mL of solvent, it was set aside to cool to induce crystal reformation. The solution was then seeded and set alone once more. When the process was complete, the crystals
The rate of cooling is immaterial except for some steels which are susceptible to temper brittleness. As the tempering is increased, the martensite of hardened steel passes through stages of tempered martensite and is gradually changed into a structure consisting of spheroids or cementite in a matrix of ferrite, formerly termed as sorbite. These changes are accompanied by a decreasing hardness and increasing toughness. The tempering temperature depends upon the desired properties and the purpose for which the steel is to be used. If considerable hardness is necessary then the tempering temperature needs to be low.
While waiting, another specimen Al 2024 at room temperature was used to measure Rockwell hardness. There was 1/16 inch steel ball. Instead of diamond, steel ball was used because Al is softer than steel. Minor load was 10 kg and major load was 100 kg. The test specimen is placed on the anvil.
Introduction The goal of this experiment was to acquire an understanding of the fundamentals of measurement in addition to analyzing the gathered data. During the experiment, an understanding of basic experimental error was gained as well as how to utilize the error equations to account for margins of error in each experiment. For Investigation 1, the mass, length and diameter of four separate cylinders was measured and utilized to calculate the volume and density of the cylinders. After recording these results in the table, the data of the cylinders was graphed. Then, in Investigation 2, a Geiger counter was utilized to measure background radiation in the lab at intervals of one minute for sixty minutes.
The tensile strength of the material increases because the subsequent application of tensile stress must nullify the compressive prestress. • This can result in improved structural capacity and serviceability compared to conventionally reinforced concrete. • High-strength tendons are used to produce compression. They are made of high- tensile steels, carbon fibers etc. and consist of threaded bars, single or multiple
The scarcity of fine aggregate for the production of mortar and concrete, as partial replacement of sand by Copper Slag have been identified. Several researchers have investigated the use of copper slag in the production of cement, mortar and concrete as raw materials for clinker, cement replacement, coarse and fine aggregates. This paper reports on some experimental investigations on the influence of partial replacement of sand by copper slag on the mechanical properties of concrete. M30 grade concrete was designed using copper slag, partially replacing the fine aggregate The fine aggregate was replaced by copper slag at various percentages ranging from 0%, 10%, 20%, 30%, 40%, 50%, 60%, 80% and 100%. The mechanical properties of concrete determined in the laboratory include compression strength, splitting tensile strength and flexural tensile strength.
Introduction Quenching is one of the most important heat treatment process to attain desirable properties, for example strength and hardness. Quenching means to rapidly cool a material. But this rapid cooling can cause some serious distortions in the material. In steels, the transformation phases and thermal gradients are the main causes of this distortion. It has become an industry objective to reduce this distortion caused by heat treatments.
The pterygium and the Tenon’s capsule between the two radial incisions is freed from the globe by blunt dissection. 4 -5 mm away from the limbus the pterygium is cut between the two incisions. The head of the pterygium is avulsed from the cornea by the method of reverse stripping, using a pair of McPherson/ plain conjunctival forceps. It involves reversing the pterygium onto cornea and application of a slow and deliberate traction to the free end of the pterygium held parallel to the corneal surface. Once a clean plane of ' tear ( pterygium-rehxis) ' is initiated at one edge of the head, the process is led around the pterygium-head by gently rotating the tearing-edge to lift the whole of pterygium off the cornea.