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Recrystallization Theoretical & Practical Aspects - Materials Science ...

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Intro<br />

<strong>Recrystallization</strong><br />

Lab 1<br />

Grain<br />

Boundaries<br />

Lab 1 - Expected Results<br />

• Hardness: before recrystallization, the hardness should<br />

increase with increasing strain (hint - relate this to what you<br />

know about stress-strain behavior in metals).<br />

• After recrystallization, the grain size will increase with<br />

increasing temperature, but decrease with increasing prior<br />

strain.<br />

• Also after recrystallization, the hardness will increase with<br />

decreasing grain size (Hall-Petch effect) in the recrystallized<br />

areas.<br />

• Note: a critical part of the Lab is to obtain high quality images<br />

of the grain structure so that you can measure grain size. The<br />

metallography involved requires skill and effort. Also,<br />

computer-based submissions are required (Word, or LaTex).<br />

24

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