question Tensile Testing of Materials Tensile testing Equipment Instron testing
ID: 1867961 • Letter: Q
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question Tensile Testing of Materials Tensile testing Equipment Instron testing machine (Figure 1). Various measuring verniers Extensometer Fiqure 1 Materials Five different materials for tensile testing are supplied: (Figure 2) 1. Vulcanised rubber 2. Polyethylene 3. Black mild steel 4. Bright mild steel 5. Aluminium Figure 2. Method Measure and record the dimensions of the cross sections of the test pieces Mark 20mm gauge lengths on the test pieces Perform One tensile tests for each type of material. (you will be supplied with an electronic record of each of the test procedures, so you will need a USB stick to record these files.)Explanation / Answer
The black mild steel is the most ductile material. The final diameter and the final gauge length have been taken into consideration to determine the ductility. The bright mild steel has the greatest tensile strength as well as the same material has the highest yield strength. The metal samples exhibit ductile fracture as they are showing yielding (elongation) before fracture where as in case of brittle fracture no elongation is shown. The best metal used for construction of bridge or skyscraper is bright mild steel because of the following properties like higher durability, fine finish, high strength. It can be formed into different plates, sheets and tubes. It consists of iron, carbon, chromium, about 0.4 to 0.7% manganese, 0.1% - 0.5% silicon, and negligible phosphorus, lead, and sulphur. The density of the material is 7850 kg/m3. The metal is easily bent and welded to the same metal or different metals. It is inexpensive in comparison with ot her metals. Bright mild steel is the toughest material. The fracture load has been taken into consideration to estimate the toughness
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