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Subject Code:E01 Conventional polycrystalline materials become harder with decreasing grain size,following the classical Hall—Petch relationship,i.e.,strength increases reversely proportional to the square root of the grain size.Strengthening occurs due to dislocation pileups at grain boundaries that prevent the dislocations from
Subject Code: E01 Conventional polycrystalline materials become harder with decreasing grain size, the following the classical Hall-Petch relationship, ie, strength increases reversely proportional to the square root of the grain size. Strengthening occurs due to dislocation pileups at grain boundaries that prevent the dislocations from