Annealing of Thermal Stresses

In general, the heating rate during the initial portion of the annealing schedule is relatively unimportant. Temporary stresses arising from a 

A material having a modulus of 50 Mpsi has a fracture surface energy of 4 J If the interatomic distance for this material is 0.25 nm, what is the theoretical strength of the material (Watch the units) 

A material having a modulus of 10 N m and a fracture surface energy of 2 J m has a pristine strength of 40 GN m . What is the interatomic distance in this material  

Discuss ion exchange strengthening mechanisms for exchange (a) below Tg of a glass and (b) above Tg of the same glass. 

Give an example of a method for each of the strengthening techniques below and explain the mechanism for strengthening by that method. 

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