ASSIGNMENT Essay Example




Low Carbon Content steel (0.05% — 0.2%) has for the longest time been the major engineering material in manufacturing car bodies. This is mostly because of their inability to be effectively heat treated which cushions them from issues related with heat affected zones in welding. They also manifest very little work hardening, and they also ductile, especially those that have negligibly small amounts of “tramp” elements like chromium. Carburising low carbon steel helps to enhance surface properties. From the figure above, it can be seen that its percentage elongation and impact strength increase with lower percentages of carbon in the steel.

  1. High Density Polyethylene (HDPE) is a type of resin that finds itself in the use for the manufacture of plastic bottles, especially for non-carbonated drinks. Structurally, HDPE is resistant to impact and forms a restriction from the passage of moisture. Typically, HDPE is synonymous with various reactants such as acid and caustics. It has very high flexibility besides being translucent. However, it can be coloured to suit the current need. For non-carbonic drinks, they’re not usually filled above 710 C. This is also a structural characteristic of HDPE.

  2. Structurally, silicon carbide as an abrasive is made of tetrahedra of carbon and silicon atoms. In its crystal lattice, it has very strong bonds in the midst of its particles. When it reacts with oxygen, silicon carbide forms silicon dioxide which is a protective layer. Its colour is black and its hardness is

  3. Carbon fibre reinforced polymer (CFRP) has been widely used in the aircraft industry due to its attractive structural features for the same purpose. Mostly it has been due to the befitting fatigue resistance characteristics that it has continued to exhibit. Its corrosion resistance is also very high compared to other engineering materials that can serve the same purpose. Another major structural characteristic of carbon fibre reinforced polymer is the fact that it is 25% lighter than metallic engineering materials, and hence perfect for design of aircrafts. Its structure is such that it is made of a polymer matrix reinforced with fibres, typically composed of aramid, carbon, or glass.

  • Austenitic SS is a metallic engineering material since it is made of high amounts of chromium and nickel which are metallic. Their carbon content is very low, and there are not magnetic.

  • PVC is a material made of chlorine atoms which are basically non-metallic. Consequently, it has high resistance to chemicals. It also has fire retarding properties.

  • Melamine formaldehyde (M-F) is a thermosetting plastic engineering material whose components typically are melamine and formaldehyde, all which are non-metallic. This, therefore, qualifies M-F as being non-metallic.

  • Butyl is a synthetic rubber made by the polymerization of isobutylene and isoprene. It has two methyl groups around each carbon atom. These being non-metallic implies that butyl is non-metallic as well

  • Copper is a metallic element by itself. This automatically qualifies it as a metallic engineering material. Specifically though, copper is a ductile metal, meaning it can easily be shaped into pipes and drawn into wires. It is also non-magnetic, and it also becomes brittle when cooled to temperatures lower than zero degrees. Copper is equally an excellent thermal and electrical conductor.

  • Diamond is not a metal. This is founded on the property that it is made of carbon atoms that are found in a crystallized structure. It has high thermal conductivity, low electrical conductivity, low thermal expansion coefficient, and resistant to corrosion.

  • CFRP is a non-metallic engineering material formed from a matrix of polymer resin and carbon fibre reinforcement, both of which are non-metallic. It is also non-metallic.

  • Porcelain is a ceramic material with specific gravity of between 2.2 to 2.4, a maximum safe operating temperature of 4000 C, tensile strength of between 1500 to 2500 psi, a poor conductor of heat and electricity, and compressive strength of between 3500 to 6000 psi.

  • Piezo crystal is a metallic engineering material whose properties include high electrical conductivity, high thermal conductivity, magnetic, and low thermal expansion.