COMPRESSION TESTING AT CONSTANT TRUE STRAIN RATES

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Am. Soc. Testing Materials, Proc.

OSTI ID:4148263

Hockett, J E

A cam plastometer was designed and built to test metal specimens in compression over a range of constant true strain rates and temperatures. Commercially pure aluminum specimens were tested at room temperature at three strain rates. Repleted uranium specimens were tested at several strain rates and temperatures. True stress versus true strain curves were calculated and found to fit an equation of the form sigma = A (1 - e/sup B epsilon /) + C epsilon , where sigma is the true stress, epsilon is the true strain, and A, B, and C are parameters. The parameters A and C were found te increase with decreasing temperature and with lange increases in strain rate. The parameter B was found to be essentially independent of temperature, but a large increase of strain rate produced an increase in B. The use of the cam plastometer with statistical methods provides an accurate means of investigating the effects of temperature and strain rate on the resistance of specimens to compression. The effects of alloying elements, impurities, grain size, and thermal treatments on the resistance to compression may also be determined by this method. (auth)

• Research Organization: Los Alamos Scientific Lab., N. Mex.
• NSA Number: NSA-14-018024
• OSTI ID: 4148263
• Journal Information: Am. Soc. Testing Materials, Proc., Journal Name: Am. Soc. Testing Materials, Proc. Vol. Vol: 59
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALLOYS
ALUMINUM
DISTRIBUTION
DUCTILITY
ENGINEERING AND EQUIPMENT
FUELS
GRAIN SIZE
HEAT TREATMENTS
IMPURITIES
INSTRUMENTS
MATERIALS TESTING
MEASURED VALUES
STATISTICS
STRESSES
TEMPERATURE
TENSILE PROPERTIES
THERMAL STRESSES
URANIUM