金属的铸造、塑性成形、热处理等过程会使晶粒的尺寸大小、取向分布、形状等发生一定的变化，产生不同的微结构。
During the casting, plastic forming, and hot processing, the sizes, orientation distributions, and boundary structures of the crystallites change and produce various microstructures.
本文从晶粒尺寸、夹杂物形态和大小以及组织结构类型等几个方面论述了管线钢韧性的控制或影响因素。
From the aspects of grain size, impurity shape and size, structure type and so on, the control or influence factors of pipeline toughness are discussed.
随着晶粒尺寸的减小，它的晶体结构、铁电性和相变温度等都表现出尺寸效应。
With decreasing grain sizes, its crystal structure, ferroelectricity and phase transition temperature all indicated the character of size effect.
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