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M6 Resit > 6.2 Non-Ferrous Materials✅ (3) > Flashcards

6.2 Non-Ferrous Materials✅ (3) Flashcards

1
Q

What is non-ferrous

A
  • Metals that do not contain iron as their base
  • non-megnetic
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2
Q

What are common non-ferrous materials

A
  • aluminium
  • copper
  • titanium
  • magnesium
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3
Q

How is aluminium obtained?

A
  • ore called Bauxite
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4
Q

When aluminium is alloyed with copper or zinc, what is the result

A
  • As strong as steel
  • 1/3 of steel weight
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5
Q

What are the 2 classes of aluminium alloys

A
  • Wrought aluminium alloys
  • Cast aluminium alloys
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6
Q

what is alloying element of 1xxx

A

Pure aluminium

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7
Q

what is alloying element of 2xxx

A

Copper

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8
Q

what is alloying element of 3xxx

A

Manganese

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9
Q

what is alloying element of 7xxx

A

Zinc

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10
Q

what is alloying element of 5xxx

A

Magnesium

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11
Q

In the 4 digit index of aluminium alloy, what does the first digit identify

A

major alloying element

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12
Q

In the 4 digit index of aluminium alloy, what does the second digit identify

A

alloy modification

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13
Q

In the 4 digit index of aluminium alloy, what does the last two digits identify

A
  • Have no special significance
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14
Q

What are the 2 most widely used aluminium alloys in aviation

A
  • 2024
  • 7075
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15
Q

To increase a materials corrosion resistance, a thin layer of pure aluminium (approx 3%-5% of materials thickness is applied). This is known as cladding (T or F)?

A

T

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16
Q

What is the main disadvantage of using magnesium?

A
  • burns readily when in dust or small particle form (causes major hazard)
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17
Q

aircraft landing wheels, engine crankcases, and valve bodies are made from what

A

magnesium alloys

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18
Q

Titanium and its alloys are lightweight materials with very high strength (T or F)

A

T

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19
Q

Pure titanium is about 50% lighter than stainless steel (T or F)

A

T

20
Q

What are the 2 commonly used nickel alloys?

A
  • Monel
  • Inconel
21
Q

Monel contains about 68% nickel and 29% copper with small amounts of iron and manganese (T or F)

A

T

22
Q

Inconel contains about 80% nickel and 14% chromium with small amounts of iron and other elements (T or F)

A

T

23
Q

What is the nickel and copper content in monel

A

68% nickel
29% copper

24
Q

What is the nickel and chromium content in Inconel

A

80% nickel
14% chromium

25
Q

What primary metal is used for electrical wiring

A

Copper

26
Q

What are the several copper based alloys in aviation

A
  • Brass
  • Bronze
  • Beryllium
27
Q

What are the 2 types of heat treatments used on aluminium alloys

A
  • Solution heat treatment
  • Precipitation heat treatment
28
Q

What is solution heat treatment

A
  • Heating aluminium alloy to allow the alloying element to mix with base metal
29
Q

What is natural ageing

A
  • alloy allowed to cool at room temperature
30
Q

How long can natural ageing take

A
  • Several hours or weeks
31
Q

aluminium alloyed with copper (2024) takes how long to gain 90% of its strength?

A

First half hour after removing from quench bath

32
Q

aluminium alloyed with copper (2024) takes how long to gain 100% of its strength?

A

4-5 days

33
Q

What is precipitation heat treatment

A
  • become hard and gain strength over a period of time
34
Q

Naturally aged alloys, such as copper zinc magnesium alloys, return to their full strength at room temperature in a short period (T or F)

A

T

35
Q

What is annealing

A
  • softens a metal and decreases its internal stresses
36
Q

Annealing is the opposite of hardening (T or F)

A

T

37
Q

When annealing clad aluminium alloys what must be done

A
  • heated as quickly and carefully as possible
38
Q

What does ‘T’ mean

A

-alloy underwent a solution heat treatment

39
Q

What does ‘T3’ mean

A
  • Solution heat treated, followed by strain hardening
40
Q

What does ‘T4’ mean

A
  • alloy underwent solution heat treatment, followed by natural ageing at room temperature
41
Q

What does ‘T6’ mean

A
  • alloy underwent solution heat treatment, followed by artificial ageing (precipitation heat treated)
42
Q

What is strain hardening also known as

A

cold working/work hardening

43
Q

What is strain hardening process

A
  • requires mechanically working a metal at a temperature below it’s critical range
44
Q

What does F mean

A

Fabricated

45
Q

What does O mean

A

Annealed

46
Q

What does H mean

A

strain hardened

47
Q

Once the alloy has been sufficiently solution heat treated, how long should you not exceed when quenching

A

10 seconds

M6 Resit (10 decks)

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