Basic Clasification of Cast Iron

The goal of the metallurgist is to design a process that will achive required mechanical properties in a material. For that we need to know what effects on mechanical structure. When discussing the metallurgy of cast iron, the main factors of influence on the structure are;

Chemical composition

Cooling rate

Liquid treatment

Heat treatment

Click Here For Complete Article

Starin and Stress

Ductile materials and Brittle materials 

      Ductile
materials are characterized by their ability to yield at normal
temperatures. Brittle materials are
characterized by the fact that rupture occurs without any noticeable
prior change in the rate of elongation.



Yield Point

      The yield point, alternatively called the elastic limit, marks the end of elastic behavior and the beginning of plastic behavior.



Elasticity

      Elasticity is the tendency of solid materials to return to their original shape after being deformed



Plasticity

      Plasticity describes the deformation of a material undergoing non-reversible changes of shape in response to applied forces.

     

Refferences:
[1] http://en.wikipedia.org/wiki/Plasticity_%28physics%29
[2] http://en.wikipedia.org/wiki/Elasticity_%28physics%29
[3] http://global.britannica.com/EBchecked/topic/653244/yield-point
[4] http://en.wikipedia.org/wiki/Stress%E2%80%93strain_curve