23 May 2014

What properties an aircraft metals have!!

The properties of the aircraft metals are as follows:
1)Hardness
2)Strength
3)Density
4)Malleability
5)Ductility
6)Elasticity
7)Toughness
8)Brittleness
9)Fusibility
10)Conductivity

Explanations:

1) Hardness:
Hardness is the ability of a material to resist abrasion,penetration,cutting action, or permanent distortion.

2) Strength:
Strength is the ability of a material to resist stress without breaking.

3) Density:
Density is the weight of a unit volume of a material.
such as    D=W/V

4) Malleability
A metal which can be hammered, rolled, or pressed into various shapes without cracking, breaking or leaving some other detrimental effect, is said to be malleable.
This property is used for making sheet metal worked  into curved shapes such as cowling, fairings, or wingtips.

5) Ductility
Ductiltiy is the property of a metal which permits it to be permanently drawn, bent, twisted into various shapes without breaking.
This property is essential for metals used in making wire and tubing.

6) Elasticity
Elasticity is the property that enables a metal to return to its original size and shape when the force which causes the change of shape is removed.

7) Toughness
A material which possesses toughness will withstand tearing or shattering and may be streched or otherwise deformed without breaking.

8) Brittleness
Brittleness is the property of a metal which allows little bending or deformation without shattering.

9) Fusibility
Fusibility is the ability of a metal to become liquid by the application of heat.

10) Conductivity
Is the property of a metal to carry heat or electricity. 

Ferrous Aircraft Metals:
The term "ferrous" applies to the group of metals having iron as their principal constituent.
1) Iron
2) Steel and steel Alloys

Explanation:

1) Iron:

a) Carbon steel
If carbon is added to iron, in percentage ranging up to approximately 1% the product is vastly superior to iron alone and is classified as carbon steel.

b) Alloy
A base metal such as iron to which small quantities of other metals have been added is called an alloy.

c) Forging
Forging are shaped or formed by pressing or hammering heated metal in dies.

d) Casting
Casting are produced by pouring molten metals into molds.

e) Spark testing
Spark testing is the common mean of identifying various ferrous metals.

       Metals                     coloured
Wroght iron  -            straw coloured
Cast iron    -             Red
Low carbon steel-    White sprigs
Nickel steel-            White blocks of light.


Test Time Guys.!!

Multiple Choice Qustions:

1) Hardness of metal can be increased by ?
a) By heat treatment
b) By cold working
c) Both a & b

2) Which is the example of Malleable metal ?
a) Copper
b) Chrome molybdenum steel
c) Nickel

3) Which is the example of Ductiltiy metal ?
a) Copper
b) Chrome molybdenum steel
c) Nickel
d) only b is correct

4) The size of tubing is generally specified by ?
a) Outside diameter
b) Inside diameter
c) As in a + wall thickness
d) Both a & b

5) Chrome nickel steel  is also known as ?
a) Carbon steel
b) Chrome vanadium steel
c) Stainless steel.


source- http://www.aviationbirds.com/2014/04/what-are-properties-of-aircraft-metals.html