A 60 mixed dislocation with a sense vector " and Burgers vector in a FCC crystal is shown in the figure below (the angle between " and is 60). The crystal is subjected to a hydrostatic pressure, . (a) Use the Peach-Koehler formula to determine the force (per unit length) on the dislocation due to the applied pressure. (b) Explain that the direction of the force and its magnitude is consistent with physical expectation (Hint: How does a screw dislocation move under a hydrostatic pressure? How does an edge dislocation move under a hydrostatic pressure?)

A 60 dislocation with a line direction 5 and Burgers vector b in a cubic crystal is shown below. The crystal is subject to hydrostatic pressure p. (1) Use the Peach-Koehler formula to determine the force (per unit length) on the dislocation due to the applied pressure. (11) Calculate the climb and glide forces