研究表明，随着金刚石磨粒粒度的减小，塑性流动变形在加工过程中起着越来越重要的作用。
The results showed that the plastic deformation played a more important role in the polishing of granite with the decrease of the grain size of the diamond bonded in the disc.
塑性流动的特殊情况是冷变形，发生在硫化橡胶长时间连续承受低应力时以及金属蠕变时。
Special instances of plastic flow are cold flow, which occurs in vulcanized rubber after low stress has been continuously applied for a long time, and creep of metals.
如图4.2所示，晶粒流动的方向就是在塑性变形期间结晶排列的方向。
As shown in Fig. 4.2, grain flow is the direction of the pattern that the crystals take during plastic deformation.
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