Elastic and plastic deformation of solids. Annual progress report, February 1, 1973--January 31, 1974

Technical Report · Mon Oct 22 04:00:00 EDT 1973

DOI:https://doi.org/10.2172/4354721· OSTI ID:4354721

Ruoff, A L

The 0 deg C freezing point of mercury determination based on the combined length and ultrasonic time pressure gage was completed and published. The transformation pressure obtained is P/sub T/ - 7571.2, 1.6 bars. The maximum deviation of the manganin gage from linearity is -11.6 plus or minus 0.1 bars at P/sub T/2/. A method of machining meter-long LiF single crystals was developed, and combined length and ultrasonic measurements on such a crystal are underway to determine second-pressure derivatives of elastic moduli and to determine the pressure dependence of the Gruneisen parameter. An apparatus was built to measure the pressure dependence of the yield stress of metals with small yield stress and experiments will commence shortly on potassium at liquid nitrogen temperatures. A pressure vessel was equipped with a furnace for internal heating to high temperature and experiments are underway to carry out hot isostatic compaction of very fine carbide particles under controlled conditions to obtain sintering to theoretical density with little grain growth. (auth)

• Research Organization: Cornell Univ., Ithaca, N.Y. (USA). Dept. of Materials Science and Engineering
• NSA Number: NSA-29-020515
• OSTI ID: 4354721
• Report Number(s): COO--3153-114
• Country of Publication: United States
• Language: English

Related Subjects

*LITHIUM FLUORIDES-- MACHINING
*MERCURY-- MELTING POINTS
*METALS-- YIELD STRENGTH
CARBIDES
DEFORMATION
GRUENEISEN CONSTANT
MEASURING METHODS
MONOCRYSTALS
N50000 --Metals
Ceramics
& Other Materials
N80700* --General & Miscellaneous
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
PRESSURE VESSELS
SOLIDS
VERY LOW TEMPERATURE