PLASTIC ANISOTROPY OF TANTALUM, NIOBIUM, AND MOLYBDENUM
- 1 February 1967
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Physics
- Vol. 45 (2) , 1075-1089
- https://doi.org/10.1139/p67-079
Abstract
The stress–strain behavior of single crystals of tantalum, niobium, and molybdenum has been studied in both tension and compression in the temperature range 4.2–400 °K. The crystals were stressed in both the and the directions.At high temperatures, the yield stress of all three metals is independent of the direction and sense of the applied stress. At low temperatures, the yield stress depends markedly on the orientation of the crystals and the sense of the applied stress. This anisotropic behavior cannot be satisfactorily explained in terms of any of the mechanisms proposed so far, such as the mobility of jogs in screw dislocations, or the dissociation of a/2 screw dislocations on {112} planes.Keywords
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