general materials

Question 1

Ferrous Alloys: >50% iron:

Answer 1

• Plain carbon steels
• Alloy steels
• Cast irons

Question 2

Non-Ferrous Alloys: <50% iron

Answer 2

• Light alloys of Al, Mg, Ti and Zn
• Heavy alloys of Cu, Pb, Ni ($$$)
• Heat resistant metals - molybdenum, tungsten
• Precious metals - gold, silver, platinum

Question 3

Thermosetting plastics

Answer 3

soften w/ heat (flexible + rel. soft

Question 4

Thermosetting plastics:

Answer 4

do NOT soften w/ heat (rigid + hard)

Question 5

Polymers:

Answer 5

↓electrical & thermal conductivity - softer, less dense + ↑ corrosion
resistance than metals.

Question 6

CERAMICS

Answer 6

• HARD + BRITTLE
• ↑compressive + ↓tensile strengths
• ↓low electrical + thermal conductivity
• Chemically inert - do not react w chemicals
  E.g. glasses,

Question 7

COMPOSITES

Answer 7

Bonding 2+ materials to create a final material = combo of good properties of bonded
material and
higher strength to mass ratio