ME 437 Mechanical Systems Design:

Assignment: Material sciencereview: Due: Wed. October 29th

This assignment is to be divided between the group members but all the questions are to be answered and put together in one document for the team.Each question must be answered briefly in one or two line. In addition, each team makes a class presention of 3 of their concepts for their term projects using simple hand-drawn 3D perspective views. No need to include these concept drawings in the write up.

Mechanical / Physical Properties

  1. What is ductility?
  2. What is toughness?
  3. What is meant by strength?
  4. What is the endurance limit?
  5. What is fatigue strength?
  6. What is hardness?
  7. What is meant by hardenability?
  8. What is stiffness?
  9. What is meant by porosity?

Manufacturing Properties

  1. What is meant by machinability?
  2. What characteristics are imortant in measuring machinability?
  3. What characteristics are important in formability?
  4. What is the difference between welding and brazing?

Material Science Fundamentals

  1. What is a polycrystaline metal?
  2. What happens in work hardening?
  3. What is the recrystalization temperature?
  4. What is a solid solution?
  5. What is an intermetalic compound?

Iron-Carbon Phase Diagram

  1. What is a phase diagram?
  2. What is -ferrite?
  3. What is austenite?
  4. What is cementite?
  5. What is pearlite?
  6. What is a cast iron?
  7. Describe the micro-structure of grey cast iron.
  8. Describe the important properties of grey cast irons.
  9. Describe the micro-structure of ductile iron.
  10. Describe the important properties of ductile iron.

Heat Treatment of Steels

  1. What are the objectives of processing heat treatment?
  2. What is full annealing?
  3. What is normalizing?
  4. What is process annealing?
  5. What is spheroidization?
  6. Describe the micro-structure of martensite.
  7. What are the mechancial properties of martensite?
  8. How is martensite formed in practice?
  9. What is the effect of tempering on martensite?
  10. What is retained austenite?
  11. What are the possible problems with retained austenite?
  12. Describe some of the drawbacks of designing heat treated parts.
  13. Name a few surface hardening techniques.

Steel Products

  1. What are the class of steel products known as plain carbon steel?
  2. What is the carbon content of low-carbon steel and what are its major applications?
  3. What is the carbon content of meduim-carbon steel and what are its major applications?
  4. What is the carbon content of high-carbon steel and what are its major applications?
  5. What are the main objectives of adding alloying elements to plain carbon steels?
  6. What are the main alloying elements in AISI 4340 steel? How much carbon it has?
  7. What are the improved properties of HSLA steels compared to plain carbon steels?
  8. State some of the favorable properties of constructional alloy steels (also known as Quench-and Tempered Structural Steels).
  9. What are free machining steels?
  10. What is the main alloying element of stainless steels?
  11. What are the four classes of stainless steels?
  12. What are the properties of ferritic stainless steels?
  13. What are the properties of martensitic stainless steels?
  14. What are the properties of austenitic stainless steels?
  15. Name some of the engineering application of bronze products.
  16. Name some of the engineering applications of brasses.
  17. What are high temperature superalloys? Examples?

Engineering Plastics

  1. Name three common engineering plastics
  2. Ask a question about engineering plastics