图 塑性变形 “Theoretical shear strength”is much higher than observed strength values. Tmax=G/10 max Formation motion of dislocations was postulated to explain this. Dislocations can be much easier to move as applied stress just makes a few atoms move a small distance b) 材料科学与工程学院 22 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering 塑性变形 22