TRANSMISSION ELECTRON MICROSCOPY, SLIP-LINES, AND WORK-HARDENING OF F.C.C. SINGLE CRYSTALS
Work on the plastic deformation of fcc single crystals (in particular flow stress measurements, stored energy, slip lines, and transmission electron microscopy) is discussed in the light of the theory of work-hardening. It is shown that the results fit the long-range stress theory of work-hardening quite well. By creep experiments on copper single crystals the various contributions to the flow stress (long--range stresses, thermally activated forest contributions, and elastic interaction with dislocation forest) were obtained. It is shown that the dominant contribution to the hardening rate is due to long- range stresses and not to the dislocation forest. Observations are presented demonstrating that the slip-line pattern on the crystal surface is equivalent to a cross section through the interior of the crystals and, therefore, give reliable information on the bulk processes. Transmission electron micrographs were obtained showing the dislocation arrangement in the principal glide plane of deformed fcc single crystals. The pattern was similar to what was predicted by the theory, and quite different from the tangled dislocation arrangement emphasized in literature. The main objections that were raised against the work- hardening theory based on long-range stresses are briefly discussed. It is shown that all of them can be met. (auth)
- Research Organization:
- Technische Hochschule, Stuttgart
- NSA Number:
- NSA-17-035767
- OSTI ID:
- 4638437
- Journal Information:
- J. Phys. Soc. Japan, Journal Name: J. Phys. Soc. Japan Vol. Vol: 18: Suppl. I
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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