Question

please explain the 1) Ductility? 2) Hardness? 3) Brittleness?

Answer 1

Practically, a ductile material is a material that can easily be stretched into a wire when pulled as shown in the figure below. Recall pulling is applying tensile stress. 

the quality or condition of being hard, is known as hardness.

A material is brittle if, when subjected to stress, it breaks without significant plastic deformation. Brittle materials absorb relatively little energy prior to fracture, even those of high strength. Breaking is often accompanied by a snapping sound.


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Answer 2

i dont know how to explain