DENDRITE GROWTH IN SUPER-COOLED METALS. Annual Report
Technical Report
·
OSTI ID:4756818
Measurements are made of the supercooling effects on dendrite growth velocity in pure bismuth. The shape of the dendrites as a function of the amount of supercooling using a vacuum decanting technique is discussed. The shape of the dendrites change markedly with supercooling. This change proceeds with increased supercooling from heavy hopper shaped crystals to the final form of dendritic loce, and individual transitions are overlapping in nature as the amount of supercooling increases. Most of the specimens, which were self nucleated at a supercooling greater than 60 deg C, exhibited a sunburst'' pattern at the crucible wall. High speed photography indicated that the origin of the sunburst is the point of initial nucleation. (H.G.G.)
- Research Organization:
- Rensselaer Polytechnic Inst., Troy, N.Y.
- NSA Number:
- NSA-17-014849
- OSTI ID:
- 4756818
- Report Number(s):
- TID-18051
- Country of Publication:
- United States
- Language:
- English
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