1.

The dislocations in the material only act as strong obstacles to the movement of other dislocations.(a) True(b) FalseI have been asked this question in an online interview.Origin of the question is Cold Rolling in section Mechanical Working of Metals of Casting-Forming-Welding II

Answer»

Right choice is (b) False

To explain I WOULD say: In general, the DISLOCATIONS in the material can be acts as either strong or weak obstacles to the movement of other dislocations of the material, which basically depends on the type of interaction that occurs between the movements of dislocations. This PROCESS is mainly considered for STRENGTHENING the material which being rolled during the process.



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