MECHANICAL PROPERTIES OF NIOBIUM-OXYGEN ALLOYS

Journal Article · Sat Dec 01 04:00:00 EST 1962 · J. Less-Common Metals

DOI:https://doi.org/10.1016/0022-5088(62)90036-X· OSTI ID:4717254

Sheely, W F

Niobium with grain size ranging from 0.1 to 2 mm and with dissolved O contents ranging from 500 to 6400 ppm twins at -- 196 deg C on yielding in compression. Twinning did not occur at --196 deg C in sampies not contaminated with O or in any of the samples at --74 deg or at higher temperatures. Deliberate contamination by 0 seemed to promote twinning at --196 deg C. In the temperature range from -- 196 to 100 deg C the effect of grain size on yield strength, either with or without twinning, increased with O content. Larger grained specimens yield at lower stresses than finer grained specimens. At elevated temperaturcs, the greatest influence of O on tensile properties was between 300 and 400 deg C, where it is believed to cause strain-aging. Any effect was lost above about 700 deg C. (auth)

• Research Organization: Union Carbide Metals Co., Niagara Falls, N.Y.
• NSA Number: NSA-17-011219
• OSTI ID: 4717254
• Journal Information: J. Less-Common Metals, Journal Name: J. Less-Common Metals Vol. Vol: 4
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

DEFORMATION
GRAIN SIZE
HEAT TREATMENTS
HIGH TEMPERATURE
IMPURITIES
LOW TEMPERATURE
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM OXIDES
OXYGEN
PRESSURE
QUANTITY RATIO
STRESSES
TEMPERATURE
TENSILE PROPERTIES