Chp. 10: Making Metals Stronger

Question 1

How are dislocations prevented from moving?

Answer 1

By pinning them

Question 2

Work Hardening

Answer 2

deforming a material so much that dislocations begin to tangle and pin each other (like bending a wire back and forth until it breaks)

Question 3

Annealed

Answer 3

To heat it enough for the atoms to become mobile and rearrange themselves (the opposite edge dislocations annihilate each other)

Question 4

Precipitation Hardening

Answer 4

introducing small impurity precipitates to hinder dislocation motion

Question 5

Sold Solution Hardening

Answer 5

using impurities to pin dislocations, hindering their motion.

Question 6

Grain Refining

Answer 6

dislocation motion is limited: dislocation pile-ups are produced at crystal boundaries