The influence of texture and impurities on the mechanical behavior of zirconium

Conference · Mon Sep 01 04:00:00 UTC 1997

OSTI ID:522707

Kaschner, G C; Gray, III, G T; Chen, S R

Development of physically-based constitutive models capable of simultaneously describing slip, twinning, and anisotropy requires knowledge of the coincident influence of each on mechanical response. The effects of interstitial impurities and texture on twinning in zirconium (Zr), in addition to variations in strain rate and temperature are utilized to probe substructure evolution and mechanical behavior. The compressive yield response of high-purity crystal-bar and commercial-purity Zr was found to depend on the loading orientation relative to the h.c.p. c-axis, the applied strain rate, varied between 0.001 and 3500/s, and the test temperature, varied between 76 and 298K. The rate of strain hardening in Zr is seen to depend on the controlling defect storage mechanism as a function of texture, strain rate, and temperature. The substructure evolution of high-purity Zr was observed to depend on the applied strain rate and test temperature; the substructure of high-purity Zr was seen to display a greater incidence of deformation twinning when deformed at high strain rate or quasi-statically at 76K.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Human Resources and Administration, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 522707
• Report Number(s): LA-UR--97-2947; CONF-970707--9; ON: DE97008294
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
IMPURITIES
MECHANICAL PROPERTIES
SLIP
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEXTURE
TWINNING
YIELD STRENGTH
ZIRCONIUM