ENME 421

8 flashcards · Other · by Dylan Matwe

1. Edge Dislocation

   Movement parallel to stress Movement perpendicular to dislocation line Burgs Vector parallel to movement

2. Screw Dislocation

   Movement perpendicular to stress Movement Parallel to dislocation line Burgs Vector perpecicular to movement

3. Order that electrons fill up

   1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s

4. How many electrons fit in the orbitals?

   s - 2 p - 6 d - 10

5. What is the d orbital exception?

   Half filled or completely filled d orbitals are more stable than those with one electron less

6. Substitutional rules

   Δr < 15% ΔElectronegativity < 0.3 Same crystal Structure Valence is higher

7. BCC Properties: # Atoms relation of a to R APF

   2 4R = √3 a 0.68

8. FCC Properties: # Atoms relation of a to R APF

   4 4R = √2 a .74