Crystallographic defects are deviations from an ideal microscopic lattice structure of metals such as vacancies or dislocations. In this video we look at the different lattice defects in a metal. 00:00 Crystallographic defects 00:50 Point defects 01:09 Vacancies 02:16 Substitutional atoms 02:37 Interstitial atoms 03:15 Line defects 03:36 Edge dislocation 04:12 Screw dislocation 05:20 Planar defects 05:33 Grain boundary 07:19 Small angle grain boundary 07:43 Twin grain boundary 08:25 Phase boundary 09:34 Stacking fault 10:01 Bulk defects