你正看到岩石片状剥落的很好例子，裂缝会沿著岩石结晶处产生而渐渐扩大。
You are looking at a good example of exfoliation, where the cracks happen along the crystalline of the rocks.
这种剥落往往发生在片状石墨芯部的离心工作辊(4辊轧机)，而且发生的部位往往是辊身中部。
These spalls occur in work rolls with flake graphite iron core used in highly loaded 4-hi hot mill stands and are predominantly located in the centre of the barrel.
疲劳损伤随加载周期依次表现为加载区的屈服、加载区外围即滑移区的虫蚀状磨损和片状剥落，以及随后出现大块脱落。
According to the loading cycles, the fatigue damage represented bend in loading area, worm - eaten abrasion or exfoliation around loading area and sequent massive exfoliation.
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