Question

What happens to the chemical properties of the substance after the plastic deformation?

Not: please write be clear, thanks

Answer 1

Plastic deformation is the permanent deformation that takes places in a material due to the application of stress.

When plastic deformation occurs, there is an increased concentrations of dislocations, as well as a changed grain boundary morphology. Dislocations in the structure are regions of high free energy, and are therefore sites of increased chemical activity. With an increase in dislocations after plastic deformation, there will be greater sites for chemical reactivity to take place, and hence the chemical activity is enhanced.

This is seen in stress-induced oxidation of steels used in boiler construction, where plastic deformation in the steel increases the rate of rusting.