介绍了各种合金结构钢(铁素体钢、铁素体珠光体钢和淬火回火钢)的形变位错结构及循环形变位错结构的研究情况，阐述了沉淀硬化合金强化过程的位错缠结机制、静载和动载竞争机制以及循环微裂纹的萌生机制。
The deformation dislocation structures and cyclic deformation dislocation structures of several alloy structural steels (ferritic steel, ferritepearlite steel and quenchtempered steel) were studied. The dislocation tangle mechanism of strengthening process for the precipitationhardening steel, competitive mechanisms of static and cyclic loading, and nucleation mechanism of cyclic microcrack were expounded.
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