In the Frank-Read source of dislocation multiplication, in which of the following steps the shear stress required will be maximum?

Where D D’ are immobile points. Immobile points are shown in black dots, and the dislocation line is shown in the blue line, which is bowing around the black points.

The interaction of screw dislocation and edge dislocation produces ______ on the edge dislocation and _______ on the screw dislocation.

a jog with an edge orientation, a kink with an edge orientation

a kink with an edge orientation, a jog with an edge orientation

a jog with a screw orientation, a kink with a screw orientation

a kink with a screw orientation, a jog with a screw orientation

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1.	In the Frank-Read source of dislocation multiplication, in which of the following steps the shear stress required will be maximum?
A.	Where D D’ are immobile points. Immobile points are shown in black dots, and the dislocation line is shown in the blue line, which is bowing around the black points.
B.	a)
C.	b)
D.	c)
E.	d)
Answer» D. c)

Discussion

2.	The interaction of screw dislocation and edge dislocation produces ______ on the edge dislocation and _______ on the screw dislocation.
A.	a jog with an edge orientation, a kink with an edge orientation
B.	a kink with an edge orientation, a jog with an edge orientation
C.	a jog with a screw orientation, a kink with a screw orientation
D.	a kink with a screw orientation, a jog with a screw orientation
Answer» B. a kink with an edge orientation, a jog with an edge orientation

Discussion