ISSN: 0090-3973
Page Count: 11

Plastic Instability and Mechanical Anisotropy of Textured Zinc

Samba Siva Rao, G
Regional Engineering College,

Godavarti, PS
Microlab Inc.,

Mahmood, ST
Global Nuclear Fuel (GNF, a subsidiary of GE),CA,

Linga Murty, K
College of Engineering, NC State University,NC,

(Received 2 April 2001; accepted 2 January 2001)

Abstract

The influence of the material parameters, strain hardening, and strain-rate hardening on the plastic instability of textured zinc sheets tested in uniaxial tension was investigated. The experimental instability strains are observed to be in accord with those evaluated from the analytical expressions involving the material parameters. The crystallite orientation distribution function obtained from the pole figure data is used in conjunction with a plasticity model to predict the anisotropy parameters (R and P) and subsequently the width strains in longitudinal and transverse zinc sheets. While the experimental R and P values matched well with those predicted for basal slip, the predicted width strains beyond uniform deformation are observed to be higher than the experimental values.

Keywords:
mechanical anisotropy, tensile, texture, slip, plastic instability, uniform and localized strains, hexagonal close packed

Paper ID: JTE12307J
DOI: 10.1520/JTE12307J
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