Construction Materials

Question 1

What are the properties of aluminium

Answer 1

strong, light, Forms 90% of all metal on AC structures

Question 2

What are alternatives to aluminium

Answer 2

• High strength steel alloy, Molybdenum steel, Stainless steel
• titanium
• magnesium
• composites

Question 3

What is aluminium most commonly alloyed with

Answer 3

2XXX aluminium + copper 2024
5XXX Aluminium + magnesium 5052
6XXX aluminium + magnesium + silicon 6061
7XXX aluminium +zinc 7075

Question 4

How is aluminium alloy identified

Answer 4

4 digit designation
the first number tells you what it has been alloyed with

1XXX pure aluminium
2XXX aluminium + copper 2024
3XXX aluminium + manganese
4XXX aluminium + silicon
5XXX Aluminium + magnesium 5052
6XXX aluminium + magnesium + silicon 6061
7XXX aluminium +zinc 7075
8XXX aluminium + others

Question 5

Name 5 A/C construction materials

Answer 5

Aluminium alloys
High strength steel alloys
titanium 
magnesium
composites

Question 6

Name the 4 Fibre reinforced plastic composite products

Answer 6

Glass fibre
Carbon fibre (cathodic)
aramid fibre (kevlar)
boron fibre

Question 7

what are the 3 types of AC construction

Answer 7

Integral (Milled or chemical)

Bonded (Adhering)

Sandwich (honey comb, end grain balsa, Plastic foam)

Question 8

Identify damage to composite materials (6)

Answer 8

Voids
Water ingress
Delamination

Barely visible impact damage
Cracking/brittle fractures
Substructure damage