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