Question 3 In a table show the mechanical properties of 1 C

Question 3:

In a table, show the mechanical properties of :

1. Commonly used Steels

2. Aluminum alloys

3. Copper Alloys

4. Titanium

5. Composites

Properties should include numerical/descriptive details of elasticity, ductility, brittleness, Young’s Modulus, and other features such as weldability etc.

In an essay, describe common uses for each of the above examples and explain why they would be chosen.

Solution

1. STEEL : Yield strength : 250 MPa

ductility : Therefore, higher strength steels require improved toughness and ductility, which can be achieved only with low carbon clean steels and by maximizing grain refinement. thermomechanical rolling process (TMR) is an efficient way to achieve this.

brittlness : The process for Quenched and Tempered steel starts with a normalized material at 900°C. It is rapidly cooled or \'quenched\' to produce steel with high strength and h ardness, but low toughness. The toughness is restored by reheating it to 600°C, maintaining the temperature for a specific time, and then allowing it to cool naturally (Tempering). Quenched and tempered steels have a \'Q\' designation.

youngs modulus : 200GPa

weldability : All structural steels are essentially weldable.

2. Aluminium : TS:260MPa

E=68.9GPa

Ductility : Aluminium is ductile and has a low melting point and density. In a molten condition it can be processed in a number of ways. Its ductility allows products of aluminium to be basically formed close to the end of the product’s design.

Weldability : Aluminium and its alloys are used in fabrications because of their low weight, good corrosion resistance and weldability. Although normally low strength, some of the more complex alloys can have mechanical properties equivalent to steels.

3. COPPER : yield strength : 70MPa

Young modu : 120GPa

Copper can be formed and stretched into complex and intricate surfaces without breaking. This makes it possible to create spires, steeples, musical instruments, bowls, bed frames, tubes and a huge number of other useful and beautiful products. The very small diameter wires, which transmit power in cars, computers, televisions, lighting and mobile phones only exist because of the high ductility and malleability of copper.