Question

The stress-strain curves are drawn for two different materials X and Y. It is observed that the ultimate strength point and the fracture point are close to each other for material X but are far apart for material Y. We can say that materials X and Y are likely to be (respectively). 

Options

• Plastic and ductile

• Ductile and brittle

• Brittle and ductile

• Brittle and plastic

Answer 1

Brittle and ductile

Explanation:

The fracture strength of brittle materials is equal to the ultimate tensile strength, unlike ductile materials, where the fracture strength is lower and the points are further apart (i.e., the points are close.) 

∴ X is a brittle material, but Y is ductile.