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Easa m6 > Ferrous metals > Flashcards

Ferrous metals Flashcards

1
Q

What is a ferrous metal ?

A

An alloy which is magnetic and contains iron as its main ingredient

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2
Q

What ferrous metal is used in aircraft structures?

A

Steel

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3
Q

What is steel made from ?

A

Iron + carbon

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4
Q

How is rust formed ?

A

When oxygen reacts with iron

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5
Q

Why is iron mixed with carbon ?

A

To prevent or slow down oxidisation

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6
Q

What are properties of steel ?

A

High density and susceptibility to corrosion

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7
Q

What is toughness of a metal ?

A

Ability to resist tearing/breaking when bent or stretched

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8
Q

What is hardness of a metal ?

A

Ability to resist cutting, penetration or abrasion

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9
Q

What is ductility of a metal ?

A

Ability to be drawn into wire stock, extrusions or rods

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10
Q

What fusibility of a metal ?

A

The joining of metals through heating and melting

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11
Q

What is an alloying ingredient of steel ?

A

Carbon

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12
Q

What are the benefits of carbon in steel ?

A

Allows steel to be heat-treated

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13
Q

What are the 3 grades of steel ?

A

Austenic, ferritic, martensitic

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14
Q

What is stainless steel ?

A

Classification of corrosion resistant steels that contain large amounts of chromium and nickel

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15
Q

What is SAE ?

A

Society of automotive engineers

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16
Q

What does the 4 digit index system for steel alloys represent?

A

Represents chemical composition standards

17
Q

What metal is not suitable as a structural material?

A

Pure Iron

18
Q

Why is steel heat treated?

A

To control the distribution of carbon

19
Q

What is an eutectoid ?

A

A metal that can exist In more than one form at the same temperature e.g. steel

20
Q

What is critical temp ?

A

Temp at which a phase change occurs in a metal during heating or cooling

21
Q

When quenching what determines the speed a material cools ?

A

The medium (water,oil or some cases air)

22
Q
A

Easa m6 (1 decks)

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