Describe fully the atomic processes which give rise to the following

Describe fully the atomic processes which give rise

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Describe fully the atomic processes which give rise to the following :Recrystallization (5pts)
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Extra things to keep in mind for Midterm 1
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Be able to explain in words and by drawing schematics the origin of dislocation multiplication.In other words, how do new dislocations form from a Frank-Read source?
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Hall-Petch Equation
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Tidbits from 10/15 pseudo -review during the beginning of lecture Ch.1 Fig. 1.1 General Trends Fig. 1.3; Fig. 1.4; Fig. 1.5; Fig. 1.6; Fig. 1.7 Ch. 2 Different types of bonds Directionality Electronegativity Trend on periodic table of elements Fig. 2.8 Be sure to be able to label all parts of the figures Know Eqns 2.4-2.7 Be able to say that the net curve is the sum of the attractive and repulsive energies/forces Ch. 3 Linear and Planar Density
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Ch. 4 Eqn. 4.1 Different types of defects Fig. 4.1 Fig. 4.2 Criteria for Solid Solutions (p. 84) Be able to explain why some elements can exhibit solid solubility while others cannot Be able to draw edge dislocation Ch. 5 Fick’s 1st Law Fick’s 2nd Law Steady state condition Activation energy for diffusion (Table 5.2) Different for different crystal structures Checklist for substitutional solid sol’n w/ Ni 1. Difference in atomic radii ( Δ R%) should be less than 15% 2. Same crystal structure 3. Similar electronegativities 4. # of valence e-s are similar
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Ch. 7 Know all stages of recrystallization and growth Know all changes to mechanical properties as a result of recrystallization and growth Fig. 7.21
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Important Topics in Ch. 13 (For midterm 2) Sec 13.3 Fig. 13.2 Sec 13.9 Glass Transition Temperature Fig. 13.6 Fig. 13.7 Melting point Working point Softening point Annealing point Strain point Annealing
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