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首页> 外文期刊>Journal of Applied Physics >Work Hardening and Dislocation Arrangement of fcc Single Crystals. II. Electron Microscope Transmission Studies of NiCo Single Crystals and Relation to Work‐Hardening Theory
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Work Hardening and Dislocation Arrangement of fcc Single Crystals. II. Electron Microscope Transmission Studies of NiCo Single Crystals and Relation to Work‐Hardening Theory

机译：fcc单晶的工作硬化和位错排列。二。 NiCo单晶的电子显微镜透射研究及其与工作硬化理论的关系

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The dislocation arrangement in the primary glide plane of deformed NiCo crystals of different compositions and stacking fault energies was investigated by the transmission electron microscope technique. The thin foils were found to contain mainly dislocations of the primary glide system close to the edge orientation. Very few screw dislocations were observed; they were presumably lost during the preparation. Straight dislocations in 〈110〉 directions, presumably Lomer‐Cottrell dislocations, were found in particular at intermediate and low stacking fault energies. The dislocation density shows local variations so that ``dislocation braids'''' can be discerned from the background. For Ni+40% Co, the dislocation densities and arrangements are compared with slip line results obtained from the same crystals. These results are found to be compatible with the so‐called glide‐zone model and the geometrical interpretation of the slip‐line pattern based on it. The final section deals with the dynamic aspect of plastic deformation and with the theory of work hardening by long‐range stresses. It is shown that the experimental observations fit this theory. Some objections that have been raised against the theory are discussed and met.
机译：利用透射电子显微镜技术研究了不同组成和不同层错能的变形NiCo晶体在初滑面上的位错排列。发现薄箔主要包含接近边缘方向的初级滑行系统的位错。几乎没有观察到螺钉脱位。他们大概在准备过程中迷路了。在〈110〉方向上的直位错，大概是洛默-科特雷尔位错，特别是在中低层错能时发现。位错密度显示局部变化，因此可以从背景中辨别出``位错辫子''。对于Ni + 40％Co，将位错密度和排列与从相同晶体获得的滑移线结果进行了比较。发现这些结果与所谓的下滑带模型以及基于其的滑移线图案的几何解释兼容。最后一部分讨论塑性变形的动态方面，以及通过长期应力进行工作硬化的理论。结果表明，实验结果符合这一理论。讨论并提出了一些反对该理论的反对意见。

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