Index What are destructive and non-destructive testing? Tensile testing Rockwell hardness testing Liquid penetrant testing Mechanical properties and application Conclusion This task covers different types of testing such as: Tensile testing; Rockwell hardness tests and liquid penetrant tests of various metals such as: Brass; Mild steel; Aluminum; Stainless steel and carbon steel and their results. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay What are Destructive Testing and Non-Destructive Testing? With destructive tests such as (tensile test and Rockwell hardness test) engineers can roughly identify the mechanical properties whether it is ductile, brittle or malleable and what pressure it overcomes if it is compressed which is a compressive force; tensile force which is a tensile force; Bending which is the stress on a material just before it yields in bending; A shear which is a shear force or a torsion which is a twisting force. We use these tests to approximate the breaking/breaking point of the material. Non-destructive testing such as (liquid penetrant testing) allows us engineers to identify the breaking points of the material without damaging it. We can use the end result to understand how to properly repair the material to achieve a smooth finish. Testing materials and components is necessary as it allows the engineer to find the best material for the product if it is durable and corrosion resistant and not ductile or brittle. If it is brittle it means there is no shrinkage, which means it will be difficult to see when it breaks. Tensile Testing Tensile testing is a way to determine how something will react when pulled apart. The results data can be used in many ways, including: determining batch quality; determine consistency in production; to assist in the design process and to ensure compliance with international and industry standards. First, when setting up we measured the materials we got which were brass; Mild steel; Aluminum and stainless steel measured the length and marked the center, then we marked 4x1cm points on both sides of the center and converted the cm to meters. After marking the material, we measured the diameter of the bar and calculated the area with the equation CSA=π (d squared)/4. Secondly, once we marked the materials, we placed them in the machine where we clamped the bottom end and clamped the top end and slowly the machine pulled the material until it cracks on a couple of metals, we see it wring out where it becomes thinner and then snaps, we can see it through the results and pictures. Rockwell Hardness Test The Rockwell hardness test is a method of measuring the hardness of materials by pressing an indenter into the surface of the material with a specific load, then measuring the distance the indenter was able to penetrate the surface. The date we tested the materials was September 18, 2018 at room temperature 23°C with the test and standard: ISO 6508-1:2015 metallic materials-Rockwell hardness test- part 1 When installing the equipment we used the B For fear of the Rockwell hardness test which was the "HRBW" hardness unit, we first set the Rockwell hardness test by inserting the metal plate where the materials go, then raising it until the little arrow was located on the black dot on the scale, secondly, once this was done, we loaded the sample in which one of these was present (Brass; Aluminum and Mild Steel) weall tested one after the other. Once the sample was loaded onto the plate, we raised the sample to the point where the indenter was lightly touching, then pressed the pressurized button to load the test, then pressed it again to run the test. test. The results obtained for mild steel were 84 HRBW, (the number indicates the Rockwell hardness value; HR means Rockwell hardness; B means Rockwell scale and W indicates the use of tungsten carbide indenter balls). The results for aluminum were 26 HRBW and the results for brass were 30 HRBW, all these results were obtained under the same test conditions to make it a fair test. Liquid Penetrant Testing Liquid penetrant testing is a widely applied and low-cost inspection method used to check the surface. breakage defects in all non-porous metals such as: metals, plastics or ceramics. This allows us engineers to determine defects in materials without damaging them so we can correct them for use in the design process. We performed this test first, this can range from grinding and wire brushing to simply wiping the part down with a rag dampened with the cleaner/remover. The surface must be free of dirt, rust, scale, paint, oil and grease and be smooth enough to remove the penetrant without leaving residue. Secondly, we applied the penetrant, generally this is done by spraying the penetrant from the spray can or applying it with a brush. A dwell (soaking) time must be observed to allow the penetrant to permeate into the cracks and voids. It usually takes 5 to 30 minutes, but it should never be long enough for the penetrant to dry. Third, we removed the penetrant, all penetrant should be removed with clean, dry, lint-free rags until completely clean. The part or material should be scrubbed vigorously until the penetrant is no longer visible on dry rags. Next, the cleaner/device should be sprayed onto another clean, dry, lint-free rag and used to vigorously scrub the area again until no penetrant is visible on the rag. Finally, we sprayed a thin, light layer of developer onto the part to be examined. A residence time must be observed to allow the dye to exit the defects and create an indication (defect) in the developer. Dwell time for the developer is typically between 10 and 60 minutes. So the defects should be visible to us engineers. My results may be different from the real ones due to several factors such as; the Rockwell hardness machine we used was old and needed to be repaired or replaced with a newer version/model, the surface the Rockwell hardness machine needed was a carbide surface while ours was on a desk supported by 4 metal supports. The environment would have been better in a workplace with metals rather than testing in a classroom and as our Rockwell hardness machine is old and needs a newer version/model, calibration on it may be a little slow and lead to incorrect readings. Mechanical Properties and ApplicationAluminum is a silvery-white, lightweight metal. It is soft and malleable. Aluminum is used in a wide variety of products, including cans, aluminum foil, kitchen utensils, window frames, beer kegs, and airplane parts. This is due to its particular properties. Brass has a similar appearance to the bright gold used.