scholarly journals Density and thermal expansion of the nickel-based superalloy INCONEL 625 in the solid and liquid states

2020 ◽  
Vol 48 (4) ◽  
pp. 381-393 ◽  
Author(s):  
S. HEUGENHAUSER ◽  
E. KASCHNITZ
Keyword(s):  
Thermal Expansion ◽  
Liquid State ◽  
Inconel 625 ◽  
Mushy Region ◽  
Maximum Temperature ◽  
Temperature Range ◽  
Nickel Based Superalloy ◽  
Displacement Sensors ◽  
Liquid States ◽  
Solid And Liquid States

Density and thermal expansion of the nickel-based superalloy INCONEL 625 were measured in the temperature range 150 °C to 1400 °C using pushrod and piston dilatometry. Commercial pushrod-dilatometers were used for the measurements. The specimens are cooled and heated slowly at controlled rates in a furnace; the expansion is transferred by a long thin rod to displacement sensors. In the high temperature range an alumina tubular body with two alumina pistons of just sufficient clearance was used to contain the specimen in the mushy region and in the liquid state The investigated material was primary heat treated at 930 °C for 1 hour. As INCONEL 625 is an age-hardening alloy, the thermophysical properties including density at elevated temperature depend slightly on heat treatment conditions. Therefore, different measurement runs with a variation of the maximum temperature in the solid state (from room temperature to 1000 °C, 1100 °C and 1250 °C) were performed to cover different heat treatments (product grades) of INCONEL 625. Due to the lack of density and thermal expansion data of INCONEL 625 in the solid and liquid states in the literature, the measured density is compared to published density data of INCONEL 718 and INCONEL 738. A detailed uncertainty analysis of the measured data in the solid and liquid state of the alloy is provided.

Raman and infrared spectra and the structure of the dimethyl ester of 2,2,4,4-tetramethylglutaric acid

1983 ◽  
Vol 48 (7) ◽  
pp. 2072-2078 ◽  
Author(s):  
Jiří Dybal ◽  
Jan Štokr ◽  
Bohdan Schneider
Keyword(s):  
Temperature Dependence ◽  
Infrared Spectra ◽  
Liquid State ◽  
Dimethyl Ester ◽  
Local Order ◽  
Dipolar Interactions ◽  
Liquid States ◽  
Solid And Liquid States

Raman and infrared spectra of the dimethyl ester of 2,2,4,4-tetramethylglutaric acid in the solid and liquid states and the temperature dependence of the spectra were measured. The behaviour of some bands in the spectra indicates the presence of three conformers in the liquid state. Local order of the molecules due to dipolar interactions of ester groups was observed.

scholarly journals Density and thermal expansion of silver in the solid and liquid states

2020 ◽  
Vol 1677 ◽  
pp. 012161
Author(s):  
R N Abdullaev ◽  
R A Khairulin ◽  
S V Stankus
Keyword(s):  
Thermal Expansion ◽  
Liquid States ◽  
Solid And Liquid States

Applicability of Wiedemann-Franz Law to Thermal Conductivity of Molten Field’s Metal

2020 ◽  
Vol 985 ◽  
pp. 1-9
Author(s):  
Nobuyuki Mizuno ◽  
Shoki Kosai ◽  
Eiji Yamasue
Keyword(s):  
Thermal Conductivity ◽  
Liquid State ◽  
Physical Property ◽  
Metals And Alloys ◽  
Convenient Approach ◽  
Wire Method ◽  
Temperature Ranges ◽  
Liquid States ◽  
Pure Sn ◽  
Solid And Liquid States

The thermal conductivity of metals and alloys is an important physical property. The thermal conductivity of metals and alloys in the liquid state is usually hard to be measured, because it is difficult to exclude the effect of convection. As such, as a convenient approach, the Wiedemann-Franz law has been used for the estimation of thermal conductivity of metals and alloys in the liquid state. However, some reports show the deviation from Wiedemann-Franz law of pure Sn and Sn-based metals in the liquid state. Measuring the thermal conductivity of various Sn-based alloys in the liquid state is of significant importance to identify its heat transfer in terms of whether the deviation from Wiedemann-Franz law is observed. In this study, Field’s metal is focused on as one of the Sn-based alloys. Then, its thermal conductivity in the solid and liquid states with various temperature ranges by employing the transient hot wire method. This method is appropriate due to its nature of dealing with the convection-including problems. Finally, the adaptability of Wiedemann-Franz law is analyzed by using the obtained thermal conductivity and electric conductivity data. In this study, the deviation from Wiedemann-Franz law was observed in the liquid state.

Far-ultraviolet spectroscopy of solid and liquid states: characteristics, instrumentation, and applications

The Analyst ◽  
2016 ◽  
Vol 141 (13) ◽  
pp. 3962-3981 ◽  
Author(s):  
Yukihiro Ozaki ◽  
Ichiro Tanabe
Keyword(s):  
Electronic Structures ◽  
Basic Science ◽  
Ultraviolet Spectroscopy ◽  
Far Ultraviolet ◽  
Liquid States ◽  
Almost All ◽  
Solid And Liquid States

Far-ultraviolet spectroscopy (≥200 nm) can greatly contribute to the basic science of electronic structures for almost all materials and their applications.

Enlarging the Temperature Range for Maximum Wear Resistance of TiNi Alloy Using a NTE Phase

2007 ◽  
Vol 539-543 ◽  
pp. 3261-3266 ◽  
Author(s):  
Iulian Radu ◽  
Dong Yang Li
Keyword(s):  
Wear Resistance ◽  
Thermal Expansion ◽  
Internal Stress ◽  
Frictional Heating ◽  
Negative Thermal Expansion ◽  
High Wear Resistance ◽  
Tini Alloy ◽  
Wear Loss ◽  
Second Phase ◽  
Temperature Range

The near-equiatomic TiNi alloy has been demonstrated to possess high wear resistance, which largely benefits from its pseudoelasticity (PE). However, the PE occurs only in a small temperature range, which makes the wear resistance of this alloy unstable as temperature changes, caused by environmental instability or frictional heating. Therefore, enlarging the working temperature of PE could considerably improve this alloy as a novel wear-resistant material. One possible approach is to develop a self-built temperature-dependent internal stress field by taking the advance of the difference in thermal expansion between the pseudoelastic matrix and a reinforcing phase. Such a T-dependent internal stress could adjust the martensitic transformation temperature to respond changes in environmental temperature so that the temperature range of PE could be enlarged, thus leading to a wide temperature range in which the minimum wear loss is retained. Research was conducted to investigate effects of an added second phase having a negative thermal expansion (NTE) coefficient on the wear resistance of a near-equiatomic TiNi alloy. It was demonstrated that the temperature range of this modified material in which the wear loss dropped was enlarged. In addition, the wear resistance of such a TiNi-matrix composite was on one order of magnitude higher than that of unmodified TiNi alloy.

scholarly journals Lattice constants and thermal expansion of H2O and D2O Ice Ih between 10 and 265 K. Addendum

2012 ◽  
Vol 68 (1) ◽  
pp. 91-91 ◽  
Author(s):  
K. Röttger ◽  
A. Endriss ◽  
Jörg Ihringer ◽  
S. Doyle ◽  
W. F. Kuhs
Keyword(s):  
Thermal Expansion ◽  
Unit Cell ◽  
Acta Cryst ◽  
Lattice Constants ◽  
Temperature Range ◽  
Polynomial Fit ◽  
Polynomial Expression ◽  
Cell Data ◽  
Cell Volumes ◽  
Volume Cell

In a previous paper we reported the lattice constants and thermal expansion of normal and deuterated ice Ih [Röttger et al. (1994). Acta Cryst. B50, 644–648]. Synchrotron X-ray powder diffraction data were used to obtain the lattice constants and unit-cell volumes of H2O and D2O ice Ih in the temperature range 15–265 K. A polynomial expression was given for the unit-cell volumes. It turns out that the coefficients quoted have an insufficient number of digits to faithfully reproduce the volume cell data. Here we provide a table with more significant digits. Moreover, we also provide the coefficients of a polynomial fit to the previously published a and c lattice constants of normal and deuterated ice Ih for the same temperature range.

scholarly journals The behaviour of water with change of temperature and with addition of electrolytes as studied by the Raman effect

1931 ◽  
Vol 130 (814) ◽  
pp. 489-499 ◽  
Keyword(s):  
Raman Effect ◽  
Exciting Line ◽  
Infra Red ◽  
The Mean ◽  
Liquid States ◽  
Solid And Liquid States ◽  
Small Dispersion

A detailed investigation of the Raman bands for water in the solid and liquid states was first made by the author. Therein it was found that both ice and water give three sets of bands at λλ 4170, 4680 and 5105 A. U. respectively, corresponding to exciting mercury lines at λλ 3650, 4047 and 4358 A. U. The positions of these bands were not identical for ice and water. The former was found to give sharper bands and their shift form the original exciting line was less than for water. The mean infra-red absorptions corresponding to the bands for ice and water were 3·1 μ and 2·99 μ respectively. The above work was done with an instrument of very small dispersion, so that the structure of the band in either case could not be studied at all.

Investigation of Fluid Dynamic Properties of Liquid Field’s Metal

2013 ◽  
Author(s):  
Adam Lipchitz ◽  
Theophile Imbert ◽  
Glenn D. Harvel
Keyword(s):  
Numerical Modeling ◽  
Liquid Metal ◽  
Linear Dependence ◽  
Dynamic Properties ◽  
Fluid Dynamic ◽  
Weight Percent ◽  
Rotational Viscometer ◽  
Liquid States ◽  
Increasing Temperature ◽  
Solid And Liquid States

The density and viscosity Field’s metal is measured in this work and compared to traditional liquid metal coolants such as sodium and lead-bismuth eutectic. Field’s metal is a eutectic of the ternary In-Bi-Sn system. The alloy is by weight percent is 51% indium, 32.5% bismuth and 16.5% tin and possesses a melting temperature of 333 K. This work experimentally measures the density and viscosity of Field’s metal for numerical modeling and thermal hydraulic applications. The density of Field’s metal is measured using a pycnometer. The density is determined for both its solid and liquid states. In its liquid state Field’s metal is found to have a linear dependence with respect to increasing temperature. The viscosity of Field’s metal is measured using a rotational viscometer. The viscosity is measured is to be 27 mPa-s at 353 K, however further investigation is required to determine a trend at higher temperatures.

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