Dear Chaithra D R ,

please 'google' for that topic...

you will find a lot of search results...

See for example:

https://www.youtube.com/watch?v=oUwJpGtwOVk

https://www.youtube.com/watch?v=ipX3iUJ5VcU

and

chapter: 'Size and strain broadening' in

https://en.wikipedia.org/wiki/Powder_diffraction

Remark: stress and strain are related by the elastic constants of the material;

but XRD will give you the strain; i. e. the relative*) change of lattice constants and lattice plane spacings, but not the stress itself...

*) strain = deltaL/L; L = length; deltaL = change of L; unit of strain is '1';

stress is force per area.

Good luck and

best regards

G.M.

Thank you sir.