Task 1
Your Task
1. Both Diamond and Graphite are made from carbon. However diamond is considered the hardest material while graphite is brittle and slippery. E xplain this difference from atomic bonding view point [10 Marks. 400 words]
2. Inconel is a corrosion resistant, tough Nickel-chromium alloy because it contains large amounts of Nickel & chromium. How does Nickel increases the toughness of the material and chromium protect the metal from corrosion? [10 Marks, 400 words)
3. Industries that manufacture racing cars prefers nickel based alloys for engine components and iron based alloys for structural parts. Justify this statement [20 Marks. 700 words]
Task 2
Material engineers should be conversant of various materials, their properties, manufacturing process involved, environmental issues, monetary issues and more.
Your Task
1. Which chromium plating is more eco-friendly - trivalent or Hexavaknt? Justify your answer in the light of environmental issues caused.
2. Explain why tempering cycle is essentially required in the heat treatment of high tensile carbon steel and what are the consequences if tempering cycle Is not carried out? [10 Marks. 400 words]
3. What are the essential criteria for selecting materials required for the following operating functions?
(a) Turbine blades which endures vibrations and saline conditions
(b) Domestic utensils used in kitchen
(c) Aircraft body to go undetected in radars
(d) Dental braces used in medical field
(e) Rocket Chambers of space shuttles.
Task 3
Ability to write an experimental report in a standard format is a key competency requirement of a Material engineer.