lecture 1 Flashcards
(26 cards)
What are the characteristics of metals?
Strong, ductile, conduct electricity and heat well, shiny if polished
What is the base metal of ferrous materials?
Iron
Name three examples of ferrous materials.
- Carbon steel
- Alloy steel
- Stainless steel
What are nonferrous materials?
Materials that do not contain iron
Name three examples of nonferrous materials.
- Aluminum
- Brass
- Silver
What are polymers primarily composed of?
Carbon and Hydrogen
At what temperature range do polymers typically decompose?
100 – 400 C
What defines a thermoplastic?
A material that becomes soft when heated and hard when cooled
Can thermoplastics be recycled?
Yes
What is a thermoset plastic?
A synthetic material that strengthens during heating and cannot be remolded after initial heat-forming
What type of bonding occurs in semiconductors?
Covalent bonding
Name two examples of semiconductors.
- Silicon (Si)
- Germanium (Ge)
What are ceramics typically composed of?
Combinations of metals or semiconductors with oxygen, nitrogen, or carbon
What are the characteristics of ceramics?
Hard, brittle, insulators
Name two examples of ceramics.
- Glass
- Porcelain
What is material removal in manufacturing?
Machining
What is the process of deforming material through heat or pressure called?
Forming
What is the purpose of joining materials in manufacturing?
To create a single part from two or more materials
Name three methods of machining.
- Sawing
- Turning (Lathe)
- Drilling
What are some forming processes in manufacturing?
- Casting
- Rolling
- Forging
What are some joining methods in manufacturing?
- Welding
- Brazing
- Soldering
What factors must be considered in manufacturing processes?
- Cost
- Quality
- Quantity
- Safety
- Equipment available
What is a power hacksaw used for?
Material cutting
What is a horizontal drilling machine used for?
Drilling operations
