Work hardening and creep of MgO

Journal Article · Sun Apr 01 04:00:00 EST 1979 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(79)90016-6· OSTI ID:6318966

Routbort, J L

The work hardening of < 100 > and < 1111 > MgO single crystals has been investigated between 0.4 and 0.7 T/sub m/ using strain rates of 10/sup -7/ to 10/sup -4/ s/sup -1/ in compression. A steady-state flow stress is developed, at which the work-hardening rate vanishes. The work-hardening rate decreases linealy with stress and can be described by a Vore equation. The data are represented by constitutive equations which were derived to describe the deformation of f.c.c. metals. The results are inconsistent with the Bailey--Orowan approach to simultaneous strain hardening and recovery. The equations are used to predict power-law creep behavior, which correlates very well with results obtained from steady-state tensile creep studies. A temperature-dependent stress exponent is measured. Finally, the activation parameters measured in this study are compared to those determined from creep, and the parameters in the constitutive equations for MgO are compared with those measured in f.c.c. metals.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 6318966
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 27:4; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals &amp; Alloys-- Structure &amp; Phase Studies
360103* -- Metals &amp; Alloys-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM
CHALCOGENIDES
COPPER
CREEP
DEFORMATION
ELEMENTS
ENTHALPY
GOLD
HARDENING
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILVER
STRAIN HARDENING
STRAIN RATE
STRESSES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS