Constitutive properties of copper and tantalum at high rates of tensile strain: Expanding ring results
Conference
·
OSTI ID:6417944
The electromagnetic launch technique has been used to study the properties of oxygen-free electronic (OFE) grade copper, processed to yield uniform grain sizes between 10 ..mu..m and 150 to 200 ..mu..m with minimal texture, and 99.9% tantalum rings with grain sizes of 25 and 65 ..mu..m expanded at peak strain rates of nearly 10/sup 4/s/sup /minus/1/. The results for OFE copper indicate an increasing flow stress as grain size decreases and are in good accord with data available in the literature. Tantalum specimens likewise show an increase in the flow stress as grain size decreases, but display virtually no apparent work hardening. The data are briefly compared to constitutive models in the literature. 18 refs., 9 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6417944
- Report Number(s):
- UCRL-98812; CONF-890324-4; ON: DE89006197
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
COPPER
CRYSTAL STRUCTURE
ELEMENTS
GRAIN SIZE
HARDENING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
SAMPLE PREPARATION
SIZE
STRAIN RATE
STRAINS
STRESSES
TANTALUM
TENSILE PROPERTIES
TRANSITION ELEMENTS
360101 -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
COPPER
CRYSTAL STRUCTURE
ELEMENTS
GRAIN SIZE
HARDENING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
SAMPLE PREPARATION
SIZE
STRAIN RATE
STRAINS
STRESSES
TANTALUM
TENSILE PROPERTIES
TRANSITION ELEMENTS