scholarly journals The densities of liquids at elevated temperatures. I. The densities of lead, bismuth, lead-bismuth eutectic, and lithium in the range melting point to 1000°C (1832°F)

1950 ◽  
Author(s):  
S. A. Been ◽  
H. S. Edwards ◽  
Teeter, Jr., C. E. ◽  
V. P. Calkins
Keyword(s):  
Melting Point ◽  
Elevated Temperatures ◽  
Lead Bismuth Eutectic ◽  
Bismuth Lead

Voids in Irradiated Tungsten and Molybdenum

1969 ◽  
Vol 27 ◽  
pp. 190-191
Author(s):  
Robert C. Rau ◽  
Robert L. Ladd
Keyword(s):  
Melting Point ◽  
Fast Neutron ◽  
Neutron Irradiation ◽  
Elevated Temperatures ◽  
Irradiation Temperature ◽  
The Body ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Cubic Metals ◽  
Face Centered

Recent studies have shown the presence of voids in several face-centered cubic metals after neutron irradiation at elevated temperatures. These voids were found when the irradiation temperature was above 0.3 Tm where Tm is the absolute melting point, and were ascribed to the agglomeration of lattice vacancies resulting from fast neutron generated displacement cascades. The present paper reports the existence of similar voids in the body-centered cubic metals tungsten and molybdenum.

Lubrication by Low-Melting-Point Metals at Elevated Temperatures

1963 ◽  
Vol 6 (4) ◽  
pp. 286-294 ◽  
Author(s):  
M. Imai ◽  
E. Rabinowicz
Keyword(s):  
Melting Point ◽  
Elevated Temperatures

Small Lead and Indium Inclusions in Aluminium

1991 ◽  
Vol 235 ◽  
Author(s):  
E. Johnson ◽  
K. Hjemsted ◽  
B. Schmidt ◽  
K. K. Bourdelle ◽  
A. Johansen ◽  
...  
Keyword(s):  
Melting Point ◽  
Elevated Temperatures ◽  
Supersaturated Solution ◽  
In Situ Tem ◽  
Initial Growth ◽  
Heating And Cooling ◽  
Moiré Fringes ◽  
The Matrix ◽  
Spontaneous Phase

ABSTRACTIon implantation of lead or indium into aluminium results in spontaneous phase separation and formation of lead or indium precipitates. The precipitates grow in topotactical alignment with the matrix, giving TEM images characterized by moiré fringes. The size and density of the precipitates increase with increasing fluence until coalescence begins to occur. Implantations at elevated temperatures lead to formation of larger precipitates with well developed facets. This is particularly significant for implantations above the bulk melting point of the implanted species. Melting and solidification have been followed by in-situ TEM heating and cooling experiments. Superheating up to ∼ 50 K above the bulk melting point has been observed, and the largest inclusions melt first. Melting is associated with only partial loss of facetting of the largest inclusions. Initial growth of the inclusions occurs by trapping of atoms retained in supersaturated solution. Further growth occurs by coalescence of neighbouring inclusions in the liquid phase. Solidification is accompanied by a strong undercooling ∼ 30 K below the bulk melting point, where the smallest inclusions solidify first. Solidification is characterized by spontaneous restoration of the facets and the topotactical alignment.

The Temperature-Dependent Ideal Shear Strength of Solid Single Crystals

2018 ◽  
Vol 85 (3) ◽  
Author(s):  
Tianbao Cheng ◽  
Daining Fang ◽  
Yazheng Yang
Keyword(s):  
Shear Strength ◽  
Theoretical Model ◽  
Melting Point ◽  
Single Crystals ◽  
Elevated Temperatures ◽  
Absolute Zero ◽  
Temperature Dependent ◽  
Temperature Changes ◽  
First Time ◽  
The Ideal

Knowledge of the ideal shear strength of solid single crystals is of fundamental importance. However, it is very hard to determine this quantity at finite temperatures. In this work, a theoretical model for the temperature-dependent ideal shear strength of solid single crystals is established in the view of energy. To test the drawn model, the ideal shear properties of Al, Cu, and Ni single crystals are calculated and compared with that existing in the literature. The study shows that the ideal shear strength first remains approximately constant and then decreases almost linearly as temperature changes from absolute zero to melting point. As an example of application, the “brittleness parameter” of solids at elevated temperatures is quantitatively characterized for the first time.

scholarly journals Nanotribology at high temperatures

2012 ◽  
Vol 3 ◽  
pp. 586-588 ◽  
Author(s):  
Saurav Goel ◽  
Alexander Stukowski ◽  
Gaurav Goel ◽  
Xichun Luo ◽  
Robert L Reuben
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Melting Point ◽  
High Temperatures ◽  
Conceptual Understanding ◽  
Experimental Verification ◽  
Elevated Temperatures ◽  
Dynamics Simulation ◽  
Major Constraint ◽  
Simulation Results

Recent molecular dynamics simulation results have increased conceptual understanding of the grazing and the ploughing friction at elevated temperatures, particularly near the substrate’s melting point. In this commentary we address a major constraint concerning its experimental verification.

Rapidly solidified and thermally treated microstructures of beryllium-1wt.% Yttrium alloy

1988 ◽  
Vol 46 ◽  
pp. 782-783
Author(s):  
L. A. Jacobson ◽  
P.L. Martin ◽  
T. E. Mitchell
Keyword(s):  
Melting Point ◽  
Elevated Temperatures ◽  
Alloying Element ◽  
High Melting Point ◽  
Superplastic Behavior ◽  
Dilute Alloys ◽  
Arc Melting ◽  
Transmission Electron ◽  
Heat Treated ◽  
Rapidly Solidified

Renewed interest in the possible use of beryllium at elevated temperatures has led to the examination of several dilute beryllium alloys with elements that form high melting point beryllide intermetallic compounds. One such alloying element is yttrium, which forms a beryllide, YBe13, with a melting point of over 1900° C. This system has been reported to have a eutectic between Be and YBe13 at a composition under 1 wt% Y. 13 Dilute alloys in this system have been investigated as to their superplastic behavior.Samples were prepared by arc melting l0g buttons of Be-1wt% Y alloy, melting at least three times to promote homogeneity. Very small pieces of a button were then arc melted on a water cooled copper hearth and splat-quenched by means of a spring loaded hammer. Pieces of splat material were heat treated for 2h at 1000°C, and 3mm disks were punched out for subsequent twin jet electrolytic thinning and examination by transmission electron microscopy.

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