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Describe fully the atomic processes which give rise to the following :Recrystallization (5pts)
Extra things to keep in mind for Midterm 1
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?
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
•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 structuresChecklist for substitutional solid sol’n w/ Ni1.Difference in atomic radii (ΔR%) should be less than 15%2.Same crystal structure3.Similar electronegativities4.# of valence e-s are similar
•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
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