Research has shown that appeared earlier material, fine grain (UFG), produced by the method of making serious permanent deformation (SPD) have better mechanical properties. And resistance to abrasion (wear resistance) increases, however, have research some of the experimental results on the other hand, the work produced by the SPD did not result in resistance to wear (wear resistance). increase, and in some cases result in resistance to wear (wear resistance), down from a literature review, we found that the behavior of I (wear behavior) of the material, fine grain produced by the method deface permanent severe (. SPD) also needs further study.
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