Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

M6 Richard 2019 > Aircraft Materials - Non Ferrous > Flashcards

Aircraft Materials - Non Ferrous Flashcards

1
Q

What are the 4 main characteristics of titanium

A
  • High strength
  • Light weight
  • Corrosion resistance
  • Temperature resistance
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How does titanium compare to steel

A

It is 56% of the weight as steel but just as strong

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why must titanium be protected when temperatures are raised above 1000°f

A

It combines rapidly with oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the tensile strength of titanium in its regular form

A

50,000-90,000 PSI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What sort of tensile strength can be achieved from titanium when alloyed with other metals

A

180,000 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What material is used to cut titanium

A

Steel and it must be kept very sharp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When machining titanium, what rules must be followed

A
  • Low Speed, High feed
  • Use plenty of cutting fluid
  • Use sharp tools
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

At what temperature will titanium ignite in the presence of oxygen

A

1950°f and 1500°f in the presence of nitrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the weight difference between steel and aluminium

A

Aluminium is 1/3 of steels weight and nearly as strong when alloyed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When would cast aluminium be used

A

In the construction of aircraft wheels and engine crank cases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What type of grain structure does cast aluminium have

A

A course grain structure, making it very brittle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What type of grain structure does wrought aluminium have

A

Compressed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How are wrought and cast aluminium identified

A

By a 4 digit AA (Aluminium association of America) number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does the first digit of an aluminium AA number usually denote

A

The major alloying element

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the melting point and density of aluminium

A

660°c and 2.7 Kg/dm3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is 2024 and 7075 normally clad with to increase corrosion resistance

A

Pure aluminium with 1% zinc

17
Q

What is the normal thickness of the cladding on alclad

A

3-5% of the material thickness

18
Q

What does the direction of the text on alclad indicate

A

It will follow the metals grain structure

19
Q

What is work hardening also known as

A

Strain hardening or cold working

20
Q

What is work hardening

A

The strengthening of a material by plastic deformation

21
Q

What metals are suitable for work hardening

A

Many non brittle metals with s reasonable high melting point including low carbon steels

22
Q

What is the annealing process

A

Heating a metal to an elevated temperature and holding and soaking it for a length of time and then cooled slowly or left to cool in a switched off furnace

23
Q

What is solution heat treatment

A

Metal heated in either molten sodium or potassium nitrate bath or in a hot air furnace, once the solution has been soaked for a prescribed amount of time it is quenched

24
Q

What is the maximum amount of time that an alloy should be removed from a solution heat treatment before being quenched

A

10 seconds

25
Q

After solution heat treatment how is a metal then hardened

A
  • Cold working
  • Natural age hardening
  • Artificial age hardening/precipitation hardening
26
Q

What is the maximum amount of times a clad material can be heat treated

A

3 times

27
Q

What are the basic temper designations

A 
F - As fabricated 
O - Annealed
H - Strain hardened 
W - Solution heat treated  
T - Heat treated to stable tempers other than F,O,H
28
Q

What are T3, T4 and T6

A

T3 - Solution heat treated and cold worked
T4 - Solution heat treated and naturally aged
T6 - Solution heat treated and artificially aged

29
Q

Is magnesium lighter or heavier than aluminium

A

Lighter

30
Q

What are the 3 main disadvantages of magnesium

A
  • Highly susceptible to corrosion
  • Difficult to work with
  • Highly flammable
31
Q

What are the 2 main advantages of aluminium

A
  • Lightweight

- Non magnetic

32
Q

How heavy is magnesium compared to aluminium

A

Magnesium is 2/3 the weight of aluminium

33
Q

Why would magnesium be used for manufacturing instrument casings

A

Mainly because of its non magnetic properties

34
Q

What fire extinguishers must not be used when tackling a magnesium fire

A

C02 or inert gas. They will increase the fires intensity

35
Q

What is glare used for in construction of aircraft

A

Fuselage skin, cargo bay liners, aircraft explosion resistant cargo containers

36
Q

What are the 6 main characteristics of glare

A
  • High strength
  • Fatigue resistance
  • Damage tolerant
  • Fatigue resistant
  • Fire resistant
  • Thermal isolation

M6 Richard 2019 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions