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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Substructural and phase transformations during plastic deformations of materials obtained by intensive deformation
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Substructural and phase transformations during plastic deformations of materials obtained by intensive deformation

机译：强化变形材料塑性变形过程中的亚结构和相变

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The paper presents the results of electron microscopy investigations of the defect structure evolution and the phase transformation of ultra fine-grained (UFG) Cu and Cu-Al-O alloy. The UFG Cu was prepared using the equal-channel angular (ECA) pressing method. The Cu-Al-O alloy was synthesized by mechanical milling and subsequent high temperature pressing. The initial grain size of the materials was 200 nm. The grain and dislocation structures were investigated qualitatively and quantitavely. In the Cu alloy, deformation twinning was revealed to occur in coarse grains together with slip deformation. The evolution of grain and dislocation micro structure in the presence or absence of solid solution and of dispersion hardening is analyzed, and differences are assessed.
机译：本文介绍了电子显微镜研究超细晶粒（UFG）Cu和Cu-Al-O合金的缺陷结构演变和相变的结果。 UFG Cu使用等通道角（ECA）压制方法制备。通过机械研磨和随后的高温压制来合成Cu-Al-O合金。材料的初始晶粒尺寸为200nm。定性和定量地研究了晶粒和位错结构。在Cu合金中，发现在孪晶中伴随着滑移变形而发生变形孪生。分析了存在或不存在固溶体以及分散体硬化过程中晶粒和位错微观结构的演变，并评估了差异。

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