M6.2 Flashcards
1
Q
What is a non-ferrous metal?
A
- Does not contain iron as it’s base material
- non-magnetic
- aluminium, copper, titanium, magnesium -> common in aircraft construction and repair
2
Q
Advantages of aluminium alloyed with copper or zinc?
A
- strong as steel
- Only 1/3 of weight of steel
3
Q
What are the 2 main classes of aluminium alloys?
A
- Wrought aluminium alloys
- cast aluminium alloys
4
Q
Explain the 4 digit index of aluminium alloy?
A
- 1st > Main alloying ingredient
- 2nd > modification of alloy
- 3rd > no special significance (alloy designator)
5
Q
What is cladding?
A
-thin layer of pure aluminium applied at high temp
6
Q
Common non-ferrous metals used in aircraft construction are?
A
- magnesium
- Titanium
- Inconel
- Monel
- Copper
7
Q
Properties of magnesium?
A
- lightweight
- Strong
- non-magnetic
- lower density compared to aluminium and weights 2/3 as much
8
Q
Disadvantage of pure magnesium?
A
- highly susceptibility to corrosion
- easily cracked when form
- burns readily
9
Q
Where do they use magnesium alloys on an aircraft?
A
- landing wheels
- engine crankcases
- valve bodies
10
Q
Pure titanium is how much lighter than stainless steel approximately?
A
- about 50% and equal in strength
11
Q
What items are made using titanium on aircraft?
A
- bolts + fasteners
- flap tracks
- engine compressor blades
- firewalls
- hydraulic pipes (that operate in high temp)
- engine exhaust
12
Q
Properties of pure titanium?
A
- soft
- ductile
13
Q
What are the 2 common nickel alloys?
A
- Monel
- Inconel
14
Q
Monel contains?
A
- 68% nickel
- 29% copper
- small amounts of iron and manganese
15
Q
Inconel contains?
A
- 80% nickel
- 14% chromium
- small amounts of iron + other elements
