Chapter 1 L01 Flashcards
What is a material?
A Material is a solid substance used to manufacture a product
What is not included as a material?
Fluids (fuels, lubricants), technical gases, soldering agents
What are the main aspects for material selection?
Performance, cost, environmentally, manufacturing
What is a process?
A process is a step to create or modify a material
Materials classification (1)?
Metals & Alloys // Plastics // Ceramics & Glass // Others
Materials classification (2)?
Natural // Synthetic // Organic // Inorganic ( + mirar diagrama)
Name the 4 material properties
Physical, Mechanical, Chemical and Processing
Name 4 Physicall properties
Denstity, Magnetic prop., Electrical prop., Thermal conductivity
Name 3 Chemical properties
Corrosion, Flammability, Resistance to other properties
Name 3 Processing properties
Castability, Weldability, Ductility
Name 4 Mechanical properties
Strength, Stiffness, Hardeness, Toughness
Advantages of Metals and Alloys
↑ Toughness, ↑Strenght, ↑Stiffness
Disadvantages of Metals & Alloys
↑ Corrosion, ↑Density, ↓ Chemical resitance
Advantages of Plastics
↓ Density, flexible, corrosion resistance
Disadvantages of Plastics
↓Strenght, ↓Stifness, sensitive to temperature
Advantages of Ceramincs & Glass
Heat resitant, low thermal expansion, corrosion resitance
Disadvantages of Ceramincs & Glass
↓Toughness, hard to proccess, hard to design
Facts about composites
Materials are mixed to compensate disadvantages.
CFC (carbon fiber reinforment ceramics): ↑Heat resistance
Why is processing highly dependent in the material choice?
Parameters like speed and force need to adjust to the material, as its properties may change during the process
