Mechanical Engineering - Engineering Materials - Discussion

The correct answer is strength and ductility.

When silicon is added to copper, it:

- Improves strength: Silicon increases the strength of copper by forming a solid solution and precipitating as a hardening phase.
- Improves ductility: Silicon also improves the ductility of copper, allowing it to be formed and shaped without cracking.

Silicon-copper alloys (also known as silumin) are commonly used in applications requiring high strength, ductility, and corrosion resistance, such as:

- Electrical components
- Heat exchangers
- Architectural Hardware
- Marine Hardware.

The other options are incorrect because:

- Improves machinability: Silicon decreases the machinability of copper, making it more difficult to machine.
- Hardness: While silicon increases the strength of copper, it does not significantly improve its hardness.
- Hardness and strength: While silicon improves strength, it does not necessarily improve hardness.

So, the specific effects of silicon on copper properties can vary depending on the alloy composition and processing conditions.

It is not silicon which improves machinability. It is a sulphur.

It will increase machinablity and softness.

Silicon added in material increases machinability.

Silicon act as graphitiser.

If silicon is added such types of material then increase the hardness of the material.

Why it is not machinability?