Accession Number:

AD0276468

Title:

SOME OBSERVATIONS ON THE EFFECTS OF HYDROSTATIC PRESSURES TO 20,000 ATMOSPHERES ON THE STRUCTURE OF POLYCRYSTALLINE BISMUTH

Descriptive Note:

Corporate Author:

WATERVLIET ARSENAL N Y

Personal Author(s):

Report Date:

1962-04-01

Pagination or Media Count:

1.0

Abstract:

The effects of extreme hydrostatic pressure on a polycrystalline material which exhibits a high degree of elastic anisotropy were studied. Metallographically prepared polycrystalline bismuth samples were subjected to pressure levels up to 20,000 atmospheres in a piston type gas-liquid system. The observed structural changes consisted of deformation localized along the grain boundaries, which appears to be a boundary migration phenomena, and widespread slip and cross slip. Subsequent deformation is progressive with increased pressure, and is substantially different in type from the deformation characteristic of uniaxial compression. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE