Accession Number:

AD0631407

Title:

RESEARCH ON HOT WORKING OF METALS, WITH PARTICULAR REFERENCE TO MICROSTRUCTURE, MECHANICAL PROPERTIES AND TEXTURE

Descriptive Note:

Final technical rept. Jan 1961-Apr 1964

Corporate Author:

BIRMINGHAM UNIV (UNITED KINGDOM) DEPT OF INDUSTRIAL METALLURGY

Personal Author(s):

Report Date:

1964-04-01

Pagination or Media Count:

117.0

Abstract:

The structure and stress-strain behaviour of O.F.H.C. copper deformed at temperatures in the range -196C to 600C, and at two strain rates, 0.005 and 500sec, were studied. A correlation was made between the structures observed optically and by transmission electron microscopy. At the low strain-rate the deformation processes varied considerably over the temperature range, but at the high strain rate the variation was small. Indications of deformation twinning were found at the high strain rate at temperatures up to 450C. Cross-slip was favored by the high strain-rate. The effect of deformation temperature on the preferred orientation produced by rolling a number of pure f.c.c. metals was studied. Variations in the rolling texture could be related to the ease of cross slip in the metal, and this concept was used to estimate the stacking fault energy of some f.c.c. metals. The rolling textures developed in f.c.c. and b.c.c. metals are explained in terms of realistic stress systems, and the variation in texture through the thickness of rolled sheet is related to rotations of the effective stress system which are governed by friction between the sheet and rolls.

Subject Categories:

  • Fabrication Metallurgy
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE