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MATSE 259 Exam 2 With Complete Solutions
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MATSE 259 Exam 2 With Complete Solutions
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MATSE 259 Exam 2 With Complete Solutions
Slip ANS✔✔ process by which a plastic deformation is produced by dislocation motion
Slip Plane ANS✔✔ crystallographic plane along which the dislocation line traverses
Slip System ANS✔✔ combination of the slip plane and the direction
Twinning ANS✔✔ a shear force can produce atomic displacements such that on one side of a plane, atoms are located in
mirror-image positions of atoms on the other side
Strengthening by Grain Size Reduction ANS✔✔ since two grains have different orientations, dislocation passing through
much change direction of motion which makes is more difficult
Strain Hardening ANS✔✔ Phenomenon whereby a ductile metal becomes harder and stronger as it is plastically
deformed (work hardening or cold working)
Recovery ANS✔✔ some of the stored internal strain energy is relieved by dislocation motion, as a result of enhanced
atomic diffusion at elevated temperature
Recrystallization ANS✔✔ after recovery is complete, grains are still relatively high energy state; a new set of strain-free
and equiaxed grains forms with low dislocation densities and are characteristic of pre-cold worked conditions
Ductile Fracture ANS✔✔ fracture that has substantial plastic deformation with high energy absorption
Brittle Fracture ANS✔✔ fracture that has no plastic deformation with low energy absorption
Cleavage ANS✔✔ crack propagation corresponds to the successive and repeated breaking of atomic bonds along specific
crystallographic directions
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