6.2 - Non-Ferrous Flashcards
What is the definition of a non-ferrous metal?
A metal with no Iron in it.
What are the properties of Titanium?
- High strength
- Light weight
- Temperature resistance
- Corrosion resistance
What preparations must be made before machining Titanium?
- Ensure any tooling is sharp and clean
- Fire extinguishing equipment available at all times
- Liquid coolant to be used during grinding
What are the properties of pure Aluminium?
- High corrosion resistance
- Malleable
- Light weight
- Too soft for aircraft construction
What is the main property of cast Aluminium?
Coarse structure, thus making it brittle.
What is the system called to designate Aluminium alloys?
Aluminium Association of America
AA number
Describe the AA numbering system
1st digit - main alloying ingredient
2nd digit - alloy modification (1 to 9)
3rd/4th digit - identifies different alloys in the
group
What does the prefix “T3” indicate?
Solution heat treated
What is cladding?
A thin layer of pure Aluminium to protect certain alloys from corrosion
What is work hardening?
The strengthening of a metal by plastic deformation.
What is Annealing?
The continuous heating of a metal, followed by the slow cooling. Increases the effectivity of cold working.
What is solution heat treating?
Metal is heated in molten sodium/potassium nitrate, or in a hot-air furnace. After heating, the metal is quenched.
How many times can a clad material be heat treated?
3, can cause corrosion if any more.
What are the basic temper designations?
F: As fabricated
O: Annealed
H: Strain hardened
W: Solution heat treated
What are the three man disadvantages of Magnesium on aircraft.
1: Can corrode very easily
2: Difficult to work with
3: Highly flammable
