Question

are grain boundaries stronger or weaker than slip system? Explain

What causes compressive forces in a crystalline lattice?

Answer 1

-10 If the applied Stress is perpendicular S to the slip plane, it would be extremiy difficult to the dislocations to move hence each grain is weaker in certain directions than in others A Weak 0 0 Weak o 0 0-to weak o - 0 . o weak o Weak Within each grain, there are preferred - planes where the atoms cin Form of disio- cation) are free to move across each Tother, these are known as Slip planea oblied stress is If the applied stress is perpendicular to the slip plane, it would be extron dicricult for the dislocations to move the applied stress coincides with Slid are the dislocations can move easily care each grain is weaker in cerfoir Tdirection than in other

Q] If a larger atom is added in lattice then the compressive Stress field is created in the crystalline lattice the atomic bond are shorter due to the Jarger radius of the solute atoms. the stress field is created in lattice I due to adding different sized atoms to the lattice (solute strengthening).