plasticity - finn

Question 1

what is a burgers circuit?

Answer 1

atom to atom path in crystal around a dislocation

Question 2

screw dislocation

Answer 2

the burgers vector is parallel to line vector

Question 3

edge dislocation

Answer 3

the burger vector is perpendicular to the line vector

Question 4

slip plane

Answer 4

plane with the most dense atomic packing
where the deformation occurs

Question 5

slip direction

Answer 5

direction on this plane with greatest linear atomic density

Question 6

slip system

Answer 6

plane + direction
a crystal deforms by motion of a dislocation on a slip plane and in a certain direction

Question 7

what is the schmidt factor?

Answer 7

the higher the schmidt factor the more likely it is that the material will start to slip along that plane and direction

Question 8

duplex slip

Answer 8

two slips become possible

Question 9

what is the difference between kinks or jogs?

Answer 9

kinks - part of the slip mechanism
jogs - thermally activated

Question 10

what is a cross slip?

Answer 10

the movement of a dislocation from one glide to another
line and burgers vector must be common to both planes

Question 11

what is a partial dislocation?

Answer 11

normal dislocation splits into two smaller dislocations separated by a thin layer called a stacking fault