Question

Which of the following metals shows a clear yield point?

• A. Copper
• B. Aluminium
• C. Mild steel
• D. Titanium

Hint:

Mild steel is commonly used in structural applications due to its clear yield point, which helps engineers determine the material's ability to bear loads before permanent deformation occurs.

Answer 1

The Correct Option is C

A clear yield point is a distinct point on the stress-strain curve where the material transitions from elastic deformation to plastic deformation.
- Copper does not show a clear yield point as it undergoes continuous deformation without a distinct yield point.
- Aluminium also does not exhibit a well-defined yield point; it has a more gradual transition.
- Mild steel, on the other hand, shows a clear yield point on its stress-strain curve, making it easy to distinguish the transition from elastic to plastic deformation.
- Titanium has a slight yield point but it is not as distinct as in mild steel.
Therefore, mild steel is the metal that shows a clear yield point.