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Mod 6 > Non-ferrous > Flashcards

Non-ferrous Flashcards

1
Q

What are the properties of titanium?

A

Good strength to weight ratio
Temp and corrosion resistance
equal to steel but 56% the weight
Very hard to work with

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2
Q

What temperatures does titanium become very dangerous?

A

At 1950 degree Fahrenheit ignites with oxygen

At 1500 degree Fahrenheit ignites with nitrogen

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3
Q

How do you protect titanium from igniting with oxygen and nitrogen?

A

Heat with helium and argon

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4
Q

What are the properties of aluminium?

A

Very malleable
Excellent corrosion resistance
Very light weight
3x lighter then steel

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5
Q

What’s the most common aluminium AISI number?

A

2024

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6
Q

What does 2024 tell you?

A

It’s major alloying element is copper
There are no modifications
Other alloying elements

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7
Q

How is aluminium surfaces protected?

A

Cladding with zinc is applied to the aluminium.

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8
Q

What are the three types of non-heat treatable aluminium alloys?

A

1100 pure aluminium
3003 aluminium manganese
5052 aluminium magnesium

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9
Q

Heat treatable aluminium alloys

A

2011 aluminium copper
2017 aluminium with other alloys (good malleability)
2024 aluminium with other alloys (high strength)
7075 aluminium zinc

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10
Q

What does F,O,H,W,T,A represent?

A 
F.   Fabricated
O.  Annealed
H.  Strain hardened
W. Solution heat treatment 
T.   Heat treated to produce stable tempers 
A.   Alclad
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11
Q

What is solution heat treatment?

A

Aluminium alloy is heated in molten sodium or potassium nitrate at 50+/- degrees Celsius of its critical temp allowing an element to impregnate into the surface.
Then rapidly cooled.

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12
Q

What is rapid cooling?

A

The material is quenched into a fine, water or oil within 10 seconds of being heated.

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13
Q

What is cold working?

A

Precipitation of the copper into the grain boundaries of the alloy

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14
Q

What is natural age hardening?

A

Cold working but over several days to allow full strength

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15
Q

What is artificial age hardening?

A

Heating the material to 1200-1900 degrees Celsius increasing the precipitation hardening.

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16
Q

What does T3,4 and 6 represent?

A 
T3= cold worked 
T4= naturally aged 
T6= artificially aged
17
Q

What are the properties of magnesium alloys?

A

Lighter then aluminium

18
Q

What are the disadvantages of magnesium alloys?

A

Easily corrodes
Highly flammable
Very difficult to work with

19
Q

What does ASTM stand for?

A

American society for testing materials

20
Q

What does GLARE stand for?

A

Glass reinforced laminate

Mod 6 (3 decks)

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