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Module 6: Materials > 6.2 - Non ferrous > Flashcards

6.2 - Non ferrous Flashcards

1
Q

What is the definition of a non ferrous metal?

A

A metal with no iron in it

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2
Q

Properties of titanium

A
  • High strength
  • light weight
  • temp resistance
  • corrosion resistance
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3
Q

What preparations must be made before machining titanium?

A
  • ensure tooling is sharp and clean
  • fire extinguishing equipment available
  • liquid coolant used during grinding
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4
Q

Properties of pure aluminium

A
  • high corrosion resistance
  • malleable
  • light weight
  • too soft for aircraft construction
  • cast or wrought form
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5
Q

Main property of cast aluminium

A

Coats structure making it brittle

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6
Q

What is the system called to designate aluminium alloys.

A

AA number

Aluminium Association of America

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7
Q

Describe the AA numbering system?

A

1 digit - main alloy ingredient
2 digit - alloy modification
3/4- identifies different alloys in the group

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8
Q

What does the prefix T3 indicate?

A

Solution heat treatment

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9
Q

What is cladding?

A

A thin layer of pure aluminium to protect certain alloys from corrosion

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10
Q

What is work hardening?

A

Strengthening of a metal by plastic deformation

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11
Q

What is annealing?

A

Continuous heating of a metal, follow by slow cooling. Increases the effectivity of cold working.

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12
Q

What is solution heat treating?

A

Metal is heated in molten sodium / potassium nitrate or in a hot air furnace. After heating the metal is quenched within 10 seconds of removal from that heat.
Any longer than 10 seconds you could introduce inter granular corrosion

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13
Q

How many times can a clad material be heat treated?

A

3, can cause corrosion if any more

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14
Q

What are the basic temper designations?

A

F: as fabricated
O: Annealed
H: strain hardened
W: solution heat treated.

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15
Q

3 disadvantages of magnesium on aircraft?

A
  1. Corrode easily
  2. Difficult to work with
  3. Highly flammable
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16
Q

Advantages of magnesium (2)

A

High strength to weight ratio

Non magnetic

17
Q

What does GLARE stand for?

A

GLAss REinforced laminate

18
Q

Basic properties of GLARE

A

High strength
Impact resistant
Fire resistant
Fatigue resistant

19
Q

What do 2,6 and 7 mean?

A 
2= copper
6 = magnesium and silicon
7= zinc

Module 6: Materials (6 decks)

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