Experimental and Crystallographic Studies of Pyramidal Slip in Magnesium
摘要
Constraint uniaxial compression of magnesium single crystals along c-axis was carried out at room temperature and elevated temperatures of up to 500 ℃. The deformation structures were characterized by electron backscatter diffraction (EBSD). The results showed no evidence of pyramidal slip and twinning was responsible for plastic deformation in the range of temperatures tested. The atomic configurations and crystallographic features associated with pyramidal dislocations were revealed with the help of CrystalMaker software and a possible dislocation core structures was reconstructed. The crystallographic analysis suggested that pyramidal slip was difficult because dislocations would involve too many atoms on irrational lattice planes and directions.