Podcast Beta
Questions and Answers
What is the primary characteristic of metals that accounts for their widespread use in structural applications?
Which of the following is NOT a characteristic of metals?
What is the term for a combination of a metal with at least one other metal or non-metal?
Which of the following metals is NOT ferrous?
Signup and view all the answers
What is the purpose of alloying and mechanical and heat treatment in metals?
Signup and view all the answers
Which of the following is a characteristic of ferrous metals?
Signup and view all the answers
What is the primary difference between ferrous and non-ferrous metals?
Signup and view all the answers
What is the term for materials that are composed of one or more metallic elements and often non-metallic elements in relatively small amounts?
Signup and view all the answers
What is the primary reason for the high hardness and brittleness of white cast iron?
Signup and view all the answers
Which type of cast iron has a higher level of vibration damping compared to steel?
Signup and view all the answers
What is the primary component of grey cast iron that forms during the cooling process?
Signup and view all the answers
Which of the following is a characteristic of grey cast iron?
Signup and view all the answers
What is the primary difference between white cast iron and grey cast iron?
Signup and view all the answers
Which type of cast iron is more resistant to rust?
Signup and view all the answers
What is the primary reason for the light appearance of white cast iron?
Signup and view all the answers
What elements are added to cast iron to produce grey cast iron?
Signup and view all the answers
Which of the following materials is not typically used in engineering applications?
Signup and view all the answers
What is the primary reason for learning about materials in engineering?
Signup and view all the answers
Which of the following learning outcomes is not directly related to material properties?
Signup and view all the answers
What is the primary purpose of testing engineering materials?
Signup and view all the answers
Which of the following materials is a type of ceramic?
Signup and view all the answers
What is the primary focus of Learning Outcome 4?
Signup and view all the answers
What is the primary reason for the brittleness of white cast irons?
Signup and view all the answers
What is the main difference between white cast iron and malleable cast iron?
Signup and view all the answers
What is the result of the formation of carbide during solidification in Malleable Iron?
Signup and view all the answers
What is the primary reason for the use of white cast iron in mining equipment and cement mill rolls?
Signup and view all the answers
What is the characteristic of graphite in Malleable Iron that gives it ductility and strength?
Signup and view all the answers
What determines the type of Malleable Iron depending on the annealing treatment?
Signup and view all the answers
What is the temperature range for the first stage of heat treatment for Pearlite malleable iron?
Signup and view all the answers
What is the primary advantage of ductile cast iron over grey cast iron?
Signup and view all the answers
What is the result of adding magnesium to the molten iron in the production of ductile cast iron?
Signup and view all the answers
What is the characteristic of malleable cast iron that makes it suitable for heavy-duty applications?
Signup and view all the answers
What is the primary application of ductile cast iron?
Signup and view all the answers
What is the advantage of ductile cast iron in terms of manufacturing process?
Signup and view all the answers
What is the characteristic of ductile cast iron that affects its casting process?
Signup and view all the answers
What is the similarity between malleable cast iron and ductile cast iron?
Signup and view all the answers
Study Notes
Types of Materials
- Learning about materials is a key decision for most engineering applications.
- Different classes of materials:
- Metals
- Alloys
- Ceramics
- Polymers
- Rubber
- Plastics
- Timber
- Cement
- Sand
- Silicon
- Glass
- Rock aggregates
- Clay
Types of Materials (Continued)
- New engineering materials and adhesives
- General classification for materials used in engineering:
- Metals
- Non-Metals
- Polymers
- Semi-conductors
- Ceramics
- Composites
Metals
- Composed of one or more metallic elements (e.g., iron, aluminum, copper, titanium, gold, nickel)
- Often also non-metallic elements (e.g., carbon, nitrogen, oxygen) in relatively small amounts
- Relatively dense
- Show good mechanical properties:
- Relatively stiff
- Strong
- Ductile (i.e., capable of large amounts of deformation without fracture)
- Resistant to fracture
- Extremely good conductors of electricity and heat
- Not transparent to visible light
- Some metals have desirable magnetic properties
- When pure, are soft and easily deformed, but can be made strong by alloying and by mechanical and heat treatment
Classification of Metals
- Ferrous metals and alloys
- Non-Ferrous metals and alloys
- Alloys (Non-Fe + other elements)
Ferrous Metals and Alloys
- Alloys (Fe + other elements)
- Cast iron
- Grey cast iron
- Characteristics:
- Better thermal conductor
- Higher level of vibration damping
- Easier to machine
- Not as ductile
- Highly resistant to rust
- Applications:
- Engine blocks
- Gearbox cases
- Cylinder heads
- Characteristics:
- White cast iron
- Characteristics:
- Carbon present only as carbide
- High hardness and brittleness
- Low silicon content
- Low melting point
- Application:
- Brake rotors
- Gears
- Bearings
- Dies
- Moulds
- Mining equipment
- Cement mill rolls
- Characteristics:
- Malleable cast iron
- Characteristics:
- Excellent machinability
- Significant ductility
- Good shock resistance properties
- Applications:
- Connecting rods and universal joint yokes
- Transmission gears
- Differential cases
- Compressor crankshafts and hubs
- Flanges
- Pipe fittings
- Valve parts
- Characteristics:
- Nodular (ductile) cast iron
- Characteristics:
- Strength higher than grey cast iron
- Ductility up to 6% as cast or 20% annealed
- Low cost
- Simple manufacturing process
- Machineability better than steel
- Low shrinkage during casting
- Application:
- Automotive industry
- Characteristics:
- Grey cast iron
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the importance of learning about materials in engineering, different classes of materials, their properties, and testing. It also touches on material selection criteria for simple engineering applications.