MSE 250 WILEY QUESTIONS & ANSWERS
Chp 7
For the edge dislocation, cite the relationship between the direction of the applied shear
stress and the direction of dislocation line motion. - Answer -Parallel
In response to an applied shear stress, an edge dislocation moves in which direction
relative to its line? - Answer -Perpendicular
How does the theoretical strength of a solid material compare with its experimental
strength? - Answer -Strengththeoretical > Strengthexperimental
A metal having a crystal structure with many operable slip systems will be relatively -
Answer -ductile
For a particular crystal structure, the slip direction is that direction in the slip plane
having the - Answer -highest linear density
For a particular crystal structure, the slip plane is that plane having the - Answer -most
dense atomic packing
Dislocations move with the same degree of ease on all crystallographic planes of atoms
and in all crystallographic directions? - Answer -False
How does grain size influence the strength of a polycrystalline material? - Answer -
Strengthfine-grained > Strengthcoarse-grained
On the average, dislocation-dislocation strain interactions are - Answer -repulsive
As a metal is strain hardened, its ductility - Answer -decreases
Chp 8 - Answer -
Which type of fracture is associated with intergranular crack propagation? - Answer -
brittle
A brittle material typically exhibits substantial plastic deformation with high energy
absorption before fracture. - Answer -False
The effect of a stress raiser is more significant for which of the following types of
materials? - Answer -Brittle Materials
Chp 7
For the edge dislocation, cite the relationship between the direction of the applied shear
stress and the direction of dislocation line motion. - Answer -Parallel
In response to an applied shear stress, an edge dislocation moves in which direction
relative to its line? - Answer -Perpendicular
How does the theoretical strength of a solid material compare with its experimental
strength? - Answer -Strengththeoretical > Strengthexperimental
A metal having a crystal structure with many operable slip systems will be relatively -
Answer -ductile
For a particular crystal structure, the slip direction is that direction in the slip plane
having the - Answer -highest linear density
For a particular crystal structure, the slip plane is that plane having the - Answer -most
dense atomic packing
Dislocations move with the same degree of ease on all crystallographic planes of atoms
and in all crystallographic directions? - Answer -False
How does grain size influence the strength of a polycrystalline material? - Answer -
Strengthfine-grained > Strengthcoarse-grained
On the average, dislocation-dislocation strain interactions are - Answer -repulsive
As a metal is strain hardened, its ductility - Answer -decreases
Chp 8 - Answer -
Which type of fracture is associated with intergranular crack propagation? - Answer -
brittle
A brittle material typically exhibits substantial plastic deformation with high energy
absorption before fracture. - Answer -False
The effect of a stress raiser is more significant for which of the following types of
materials? - Answer -Brittle Materials
