6.1 要点扫描 6.1.1 金属的弹性变形 6.1.2 单晶体的塑性变形 6.1.3 多晶体的塑性变形与细晶强化 6.1.4 纯金属的塑性变形与形变强化 6.1.5 合金的塑性变形与固溶强化和第二相强化 6.1.6 冷变形金属的纤维强化和变形织构 6.1.7 冷变形金属的回复与再结晶 6.1.8 热变形、蠕变和超塑性 6.1.9 断裂 6.2 难点释疑 6.2.1 从原子间结合力的角度了解弹性变形。 6.2.2 从分子链结构的角度分析粘弹性。 6.2.3 FCC、BCC 和 HCP 晶体中滑移线的区别。 6.2.4 Schmid 定律与取向规则的应用。 6.2.5 孪生时原子的运动特点。 6.2.6 Zn 单晶任意的晶向[uvtw]方向在孪生后长度的变化情况 6.3 解题示范

6. 8 Diffusion Mechani sm Flick's' law in microscopic form 1. One dimensional diffusion. jump frequency period probability of atom jumping to nearest position

1. There have no two-phases area in diffusion area, every layer is single-phases 2. Phase's interface moves according to parabola law 3. Phase's width

36. 5 concentration dependence of D. Matano method d -C- dependence ll Matano method

(for one dimensional diffusion only 1. Infinite system 1. Formula

I Atom movement in sol ids mechanical movement thermal vibration (short-range migration) Thermal motion diffusion(long-range migration)

5. 19 Reaction between Dislocation Condition 1. Geometrical condition

Back stress exerted by obstacle on leading dislocation. (It is supposed to be a short-range-force.) nrbdx =tpbdx dx virtual displacement

By cottrell atmosphere model, we can explain the sharp yielding phenomenon

5.16 Dislocation in FCC crystals Perfect dislocation b =na, +nb. +nC