Week 6 Flashcards
Crystals deform on specific _____ and directions
Planes and directions!
Material paradigm: very SMALL changes to _______ can lead to _______ changes in _______
Structure
Big
Properties
Material paradigm: even in FCC, there’s a lot of ________
Space
Planes: when do we use ROUND brackets
For single planes
Planes: when do we use CURLY brackets
For families of planes
Directions: when do we use SQUARE brackets
For individual directions
Directions: when do we use ANGLE brackets
For families of directions
Crystal imperfections can be beneficial
List the 6 types of crystal scale defects
Substitutional foreign atom
Interstitial foreign atom
Edge dislocation
Vacancy
Unit cell of an alpha ion
Acre dislocation
3 types of point defects
Vacancies
Self-interstitial
Solute
Point defects: 2 type of solutes
Substitutional
Interstitial
Point defects: what does a vacancy look like
Point defects: what does a substitutional impurity look like
Point defects: what does an interstitial impurity look like
Point defects: what does a self interstitial look like
Solute: Substitutional atoms must be similar in
(4 things)
Atomic size
Crystal structure
Electronegatitivty
Valence
Atomic % and weight %: SMALL additions can have a ______ impact
(And explain)
1080 steel has 0.8 wt% carbon, which is 3.7 at%
What are line defects called
Dislocations
What is “b”
Burgers vector
What does the line arrow show
Edge dislocation line
Which is the dislocation line and which is the Burgers vector
Dislocation line: close to A
Burgers vector: red arrow
What are interfacial defects called
Grain boundaries
The distance between two adjacent and parallel planes of atoms is a function of the
______ ______ (h,k,I) and the ________ _______
Miller indices
