Accession Number:

AD0611832

Title:

DEFORMATION PROCESSING OF ANISOTROPIC METALS.

Descriptive Note:

Progress rept. no. 2, 1 Sep-31 Oct 64,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE METALS PROCESSING LAB

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

6.0

Abstract:

This report presents experimental yield loci and pole figures for four alpha titanium alloy sheets. The pole figures for these materials exhibited a wide range of crystallographic textures ranging from a tight texture about the sheet normal in 116-in thick 4 Al-14 O2 through a split texture along the transverse direction in 5 Al-2.5 Sn, to a texture with the basal-plane normals concentrated about the transverse direction in RC-70. R values in the rolling and transverse directions are shown as a function of strain. There is a clear relationship to texture. Presented are experimental yield loci, loci calculated from uniaxial R values and yield strengths by the Hill theory and calculated loci for isotorpic material. Agreement with the Hill theory appears to be good except for the 116-in thick 4 Al-14 O material in which texture hardening is considerably less than predicted this may result from much more extensive twinning under the higher stresses in combined stress plane-strain compression loading. Implicit in calculations based on the Hill theory is an assumption of a fixed deformation mode if the mode were to change under the high stresses for yield in texture hardened sheet, applicability of the theory would be restricted.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE