研究了多晶体材料中螺型位错偶极子和界面裂纹的弹性干涉作用。
The elastic interaction between a screw dislocation dipole and a mode III interface crack is investigated.
在多晶体材料中晶粒平均尺寸的增加，对大多数材料来说，这需要在一定温度下进行热处理。
The increase in average grain size of a polycrystalline material, for most materials, an elevated-temperature heat treatment is necessary.
多晶体材料中晶粒尺寸的增大，对大多数材料来说，晶粒长大只在升高温度加热的时候发生。
The increase in average grain size of a polycrystalline material; for most materials, an elevated-temperature heat treatment is necessary.
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