DEFORMATION RESULTING FROM GRAIN BOUNDARY SLIDING
The determination of equations relating elongation to the amoumt of shear taking place both along grain boundaries and in slip planes of polycrystalline aggregates during creep was studied. Certain discrepancies with previously used equations are pointed out. Grain boundaries were observed to become rumpled'' during creep, but it is shown that this does not necessarily prevent further grain boundary sliding. Direct observations of subgrain boundary migration lead to the conclusion that this migration facilitates sliding along rumpled grain boundaries. An attempt is made to determine the magnitude of the hydrostatic stress along the edges of the grains (at the triple points on the specimen surface) during creep. Contrary to popular opinion, this is still an unsolved problem. (auth)
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge
- DOE Contract Number:
- AT(30-1)-1973
- NSA Number:
- NSA-12-004834
- OSTI ID:
- 4313770
- Report Number(s):
- NYO-4772
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
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