6.2 Non-Ferrous Materials✅ (3)

Question 1

What is non-ferrous

Answer 1

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

Question 2

What are common non-ferrous materials

Answer 2

• aluminium
• copper
• titanium
• magnesium

Question 3

How is aluminium obtained?

Answer 3

• ore called Bauxite

Question 4

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

Answer 4

• As strong as steel
• 1/3 of steel weight

Question 5

What are the 2 classes of aluminium alloys

Answer 5

• Wrought aluminium alloys
• Cast aluminium alloys

Question 6

what is alloying element of 1xxx

Answer 6

Pure aluminium

Question 7

what is alloying element of 2xxx

Answer 7

Copper

Question 8

what is alloying element of 3xxx

Answer 8

Manganese

Question 9

what is alloying element of 7xxx

Answer 9

Zinc

Question 10

what is alloying element of 5xxx

Answer 10

Magnesium

Question 11

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

Answer 11

major alloying element

Question 12

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

Answer 12

alloy modification

Question 13

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

Answer 13

• Have no special significance

Question 14

What are the 2 most widely used aluminium alloys in aviation

Answer 14

• 2024
• 7075

Question 15

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)?

Answer 15

T

Question 16

What is the main disadvantage of using magnesium?

Answer 16

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

Question 17

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

Answer 17

magnesium alloys

Question 18

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

Answer 18

T

Question 19

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

Answer 19

T

Question 20

What are the 2 commonly used nickel alloys?

Answer 20

• Monel
• Inconel

Question 21

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

Answer 21

T

Question 22

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

Answer 22

T

Question 23

What is the nickel and copper content in monel

Answer 23

68% nickel
29% copper

Question 24

What is the nickel and chromium content in Inconel

Answer 24

80% nickel
14% chromium

Question 25

What primary metal is used for electrical wiring

Answer 25

Copper

Question 26

What are the several copper based alloys in aviation

Answer 26

- Brass - Bronze - Beryllium

Question 27

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

Answer 27

- Solution heat treatment - Precipitation heat treatment

Question 28

What is solution heat treatment

Answer 28

- Heating aluminium alloy to allow the alloying element to mix with base metal

Question 29

What is natural ageing

Answer 29

- alloy allowed to cool at room temperature

Question 30

How long can natural ageing take

Answer 30

- Several hours or weeks

Question 31

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

Answer 31

First half hour after removing from quench bath

Question 32

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

Answer 32

4-5 days

Question 33

What is precipitation heat treatment

Answer 33

- become hard and gain strength over a period of time

Question 34

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

Answer 34

T

Question 35

What is annealing

Answer 35

- softens a metal and decreases its internal stresses

Question 36

Annealing is the opposite of hardening (T or F)

Answer 36

T

Question 37

When annealing clad aluminium alloys what must be done

Answer 37

- heated as quickly and carefully as possible

Question 38

What does 'T' mean

Answer 38

-alloy underwent a solution heat treatment

Question 39

What does 'T3' mean

Answer 39

- Solution heat treated, followed by strain hardening

Question 40

What does 'T4' mean

Answer 40

- alloy underwent solution heat treatment, followed by natural ageing at room temperature

Question 41

What does 'T6' mean

Answer 41

- alloy underwent solution heat treatment, followed by artificial ageing (precipitation heat treated)

Question 42

What is strain hardening also known as

Answer 42

cold working/work hardening

Question 43

What is strain hardening process

Answer 43

- requires mechanically working a metal at a temperature below it's critical range

Question 44

What does F mean

Answer 44

Fabricated

Question 45

What does O mean

Answer 45

Annealed

Question 46

What does H mean

Answer 46

strain hardened

Question 47

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

Answer 47

10 seconds