Heat treatment is a controlled process used to alter the microstructure of materials such as metals and alloys to impart properties which benefit the working life of a component, for example.

热处理是一个控制过程，用来改变材料(如金属和合金)的微观结构来传递它们的特性，例如可延长组件的使用寿命。

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Research of SEM indicates that the heterogeneity of grain size is the typical microstructure of the materials.

SEM对试样微观形貌的研究表明，晶粒大小不均匀是这种材料的微观特征。

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Three-dimensional reconstruction and quantitative characterization of the microstructure of materials is the most important and difficult part of material science.

材料微观组织结构的三维重构和定量表征一直是国内外材料科学领域的焦点和难点。

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Often, when models for buildings are developed, material resistance to blast pressure and fire are unknown, as is the lifetime of materials, microstructure and stresses.

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