Arrangement of Dislocations in Iron Crystals Stretched in Tension

概要

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Piled-up dislocations and dislocations forming cell structure in iron crystals are examined by transmission electron microscopy. It is found that the piled-up dislocations are observed in the crystals for single slip in the range of the appropriate amount of deformation, and that the cell structure is formed by intertwinning dislocations on different slip planes. Relation between the flow stress and the density of dislocations both piled-up and arranged in cell structure is discussed. The stress concentration factor acting on a leading dislocation among the piled-up dislocations is about 2 at room temperature, while the average number of the piled-up dislocations is as large as 7. The discrepancy between the stress concentration factor and the number of the piled-up dislocations will be caused by the relief of the stress due to cross slip. The existence of dislocations showing cross slip in the piled-up dislocations arranged in a row may verify the validity of the consideration.
社団法人応用物理学会の論文
1963-05-15