Imperfections in Solids (Continue)

Content:

• Line Defects: Dislocations and their Scale
• Line Defects: Dislocations
• Incremental Slip and Bond Breaking
• Edge Dislocations Exiting Crystal Form Steps
• Dislocations: Screw, Edge and Mixed (in handout)
• Formation of Steps from Screw and Edge Dislocations
• The Edge Dislocations and Burger’s Vector
• Dislocations Can Create Vacancies and Interstitials
• Planar Defects: Surfaces
• Planar Defects: Grain Boundary
• Relative Energies of Grain Boundaries
• Dislocation Interactions Can Create Planar Defects!Small-Angle Grain Boundaries: a tilt and a twist
• Twin Boundaries: an atomic mirror plane
• Twin Boundaries: Load drop in F vs %EL
• Stacking Faults: Messed up stacking
• Optical Microscopy
• Polymer, too: Colloidal Epitaxy via Focused Ion Beam Lithography
• Use Microscopy to see defects: contrast using optical, electron, scanning probe
• TEM Image of Dislocations in Ti Alloy
• SUMMARY

Researchers should cite this work as follows:

• Duane Douglas Johnson; Omar N Sobh (2008), "Illinois MATSE 280 Introduction to Engineering Materials, Lecture 5 - Part 2 : Line Defects, Dislocations and their Scale," http://nanohub.org/resources/5864.

1. Illinois 1
2. material properties 1
3. materials 1
4. material science 1