if you have a crystalline material and it has already grown, can we form disloca

Question

if you have a crystalline material and it has already grown, can we form dislocations in the material by heating it to a very high temperature? it is assumed that you are trying to explicitly use heating as the mechanism only to cause the formation of the dislocation? explain why or why not- it may be assumed knowledge that you know formation vs multiplication of disslocations, and that you could calculate a theoretical temerature possibly at which this could happen if it could. (maybe a hint at melting temperature to anneal it where it goes liquid back to soild ?

Explanation / Answer

Yes we can make dislocations in the materials by heating it at high temperature because at high temperature the aplitude of the oscillations of the molecules becomes high and they leave the position where it was initialy present

Here we can also explain by melting temperature theory like if we increase the temperature more than melting temperature then its shape and size will totally change and all its crystalline structure will change due to dislocation of its molecules

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