Ductile vs Brittle material...

 Welcome today's blog.....

Lets us discuss what are the major differences between the Ductile and Brittle Materials...

Most of the materials can undergo significant plastic deformation under tensile stress before the fracture is called as ductile materials. Whereas, the materials which break without significant plastic deformation under tensile stress are called as brittle materials. Ductile materials are steel, copper and glass, concrete is brittle materials. 

In the figure below, the stress-strain diagram is depicted which explains the brittle materials fractures before the plastic deformation under tensile test. Explicitly, sudden fracture takes place however the material absorbs a certain amount of energy before the rapture.

Major differences are;

1. Pre-elongation length of the brittle materials is less than compared to the ductile materials.

2. Ductile materials have more life when subjected to fatigue loading.

3. Ductile materials fail gradually by neck formation under tensile load whereas, the brittle material suddenly breaks.

4. Brittle materials are not used for forming operations such as rolling, forging. 

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