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Tungsten-rhenium alloys are also applied in rotating anodes, e.g., for mammography, angiography and computer tomography (CT). These days the most frequent rhenium application is the production of superalloys for jet engines. The nickel superalloys contain 3–6% rhenium and are utilized in combustors, turbine blades and jet nozzles.
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(8 to 10 percent) on the addition of about 5 percent rhenium to tungsten has prompted several studies to determine if improved ductility could be achieved in these dilute, less …
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Yesterday's Pioneer, Today's Leader. rhenium TF: 888-RHENIUM (888-743-6486) PH: 440-365-7388 FX: 888-366-9830 W-3 Re Tungsten-Rhenium Alloy | MECHANICAL AND PHYSICAL PROPERTIES Metric English Physical Properties Density 19.55 g/cc 0.7063 lb/in³ Mechanical Properties Tensile Strength, Ultimate 1242 - 2208 MPa 180100 - …
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1.1 This specification covers the requirements for bare, solid conductor, tungsten and rhenium alloy thermoelements having diameters of 0.127 mm (0.005 in.) to 0.508 mm (0.020 in.) supplied in matched pairs. These thermoelements shall be suitable for use either in bead-insulated, bare-wire thermocouples, or in compacted metal-sheathed, …
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Rhenium is one of the main transmutation elements forming in tungsten under neutron irradiation.Therefore, it is essential to understand the influence of rhenium impurity on hydrogen isotopes retention in tungsten. First-principle calculations were used to study the properties of hydrogen solution and diffusion in perfect tungsten-rhenium …
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Oxidation kinetics of pure tungsten (W) and tungsten-rhenium (W-Re) alloys with Re contents of 1%, 5% and 15% has been examined in the oxygen gas atmosphere …
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Experimental data show that the accumulation of rhenium and osmium from transmutation reactions severely affect the microstructural evolution and property …
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Tungsten alloy with addition of rhenium and tantalum was prepared by laser sintering. Microstructure and properties of the samples were tested by optical microscope, X-ray diffractometer and ...
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The average emf of types C and D is slightly less than that of the unalloyed type G. Sold only as matched pairs. A double foot is a foot of positive and matched negative wire. Single, bare, thermocouple wire or extension wire spools. Type C, G, D, or CX. Fine wire diameters from 0.08mm to .51mm. Click to build a matched pair.
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A tungsten-rhenium thin film thermocouple is designed and fabricated, depending on the principle of thermal-electric effect caused by the high temperature. The characteristics of thin film thermocouples in different temperatures are investigated via numerical analysis and analog simulation. The working mechanism and thermo-electric …
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The solubility of tungsten in rhenium at the temperature of 2800 °C is 20%, and at the temperature of 1500 °C it is 12%. Rhenium solubility in nickel at 1620 °C is 17.4%. It should be emphasized that the attached system displays equilibrium with the W-Re phase above the temperature of 1500 °C.
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Arc melted tungsten - 4 percent rhenium - hafnium - carbon (W-4Re-Hf-C) alloys containing up to about 0. 8 mol percent HfC were fabricated-into rod and sheet for eval-uation of compositional effects on mechanical properties in the as-worked condition.
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Scope. 1.1 This standard consists of reference tables that give temperature-electromotive force (emf) relationships for 97% Tungsten 3% Rhenium versus 75% Tungsten 25% Rhenium and 95% Tungsten 5% Rhenium versus 74% Tungsten 26% Rhenium thermocouples. These are the refractory metal thermocouple types most …
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The calibration results show that the thin film thermocouples based on the tungsten-rhenium material achieve ideal static characteristics and work well in the practical applications. A tungsten-rhenium thin film thermocouple is designed and fabricated, depending on the principle of thermal-electric effect caused by the high temperature. The …
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Sunstone specializes in the development and manufacture of products made from tungsten, molybdenum rhenium and its alloys. Sunstone have been a recognized leader in the tungsten, molybdenum rhenium deep processing industry. Sunstone was built in 1995 and is the leading manufacture which takes part in the state 863 and 973 projects and …
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Tungsten-rhenium thin film thermocouples (TFTCs) are well suited for the surface temperature monitoring of hot components due to their small size, rapid response and low cost. In this study, a tungsten-rhenium TFTC with SiC protective film on all parts except the pads was fabricated by a microelectromechanical system (MEMS) process. …
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Additively manufactured tungsten-rhenium alloys have been compared with pure tungsten in terms of their volumetric density, cracking behavior, microstructure, and hardness. The compositions W-5 wt.%Re and W-25 wt.%Re were explored. Increasing the rhenium content led to an increasing percentage of the theoretical density, with a …
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Surface modification and deuterium (D) retention in rhenium (Re) doped tungsten (Namely, W-5 wt.% Re) exposed to 100 eV deuterium plasma with a constant flux of 1.8 × 10 21 D/m 2 /s were investigated. All the samples were exposed to D plasma at three types of exposure conditions, namely, exposure with doses of 1.3 × 10 25 D/m 2 …
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In another study, rhenium and tungsten coating processes were applied to graphite, stainless-steel and copper materials . Rhenium has been considered as a potential nuclear reactor shielding material . In the present study, new high-temperature resistant rhenium-based neutron shielding alloys were studied using GEANT4 code [13, …
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The results showed that the tungsten-rhenium wires with nanofibrous grains exhibited a very high tensile strength reaching values of 3.5 GPa and 4.4 GPa for the coarse (grains diameter of 240 nm ...
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costly, tungsten-rhenium alloys. Pugh et al. (ref. 5) have demonstrated that this is the case with fine wire of doped tungsten made by powder metallurgy techniques. In a pre-vious study (ref. 6), room-temperature bend ductility in worked sheet fabricated from electron-beam-melted tungsten alloys with 2 and 6 percent rhenium was observed.
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A tungsten-rhenium (W-Re) classical interatomic potential is developed within the embedded atom method (EAM) interaction framework. A force-matching method is employed to fit the potential to ab initio forces, energies, and stresses. Simulated annealing is combined with the conjugate gradient technique to search for an optimum potential …
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The fracture toughness of sintered and forged tungsten alloys with rhenium contents of 5, 10 and 26 wt% respectively increased at 800 °C [76, 77]. The solid solution alloying of rhenium in BCC metals improves strength and ductility, which is called "rhenium effect" [78]. The "rhenium effect" is mainly attributed to the softening mechanism of ...
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The toughening of tungsten by alloying with another metal has been widely studied in powder metallurgy. The main alloy compositions include tungsten tantalum [39,40,41], tungsten vanadium [42, 43], tungsten rhenium [44,45,46], and tungsten niobium . However, due to the high melting point and low diffusivity of tungsten, the …
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Historically, tungsten-25wt.% rhenium alloy has been manufactured into wire for the thermocouple market, but recent demands for high-temperature structural components have forced the development of novel processing techniques for tungsten-rhenium and tungsten-rhenium with hafnium carbide. With a melting temperature of …
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Properties and microstructure of oxide dispersion strengthened tungsten alloy prepared by liquid-phase method: a review. The addition of the second phase into tungsten can significantly refine the grain size of tungsten alloys, and also play a role in dispersion strengthening, thus improving the properties of tungsten….
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On the whole, the total thermal conductivity can be largely reduced if the solute rhenium in tungsten exceeds 3 wt%. Download : Download high-res image (2MB) Download : Download full-size image; Fig. 5. Thermal conductivities of W–Re alloys as function of temperature and grain size. The size and temperature are in range of 10–100 …
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95% tungsten - 5% rhenium (W-5Re) and 74% tungsten - 26% rhenium (W-26Re) were sputtered as the positive film and negative film of TFTCs on the silicon carbide ceramic substrate. The hot junction, which determined the thermal load, was made by the superposition film of W-5Re film and W-26Re film. The cold junction is at the end …
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rhenium were double electron-beam melted and subsequently fabricated to 0. 3-inch rod by extrusion and swaging. An alloy containing 36-atomic-percent rhenium could not be fabricated. The starting materials were commercial powders of tungsten and rhenium with im purity levels as listed in table I. The particle size of the tungsten powder averaged
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Table 1 summarizes the reported results on the effect of alloying elements on tungsten's DBTT. The tungsten-rhenium alloys are, of course, the most well-known tungsten alloy system enhancing ductility [23, 40, 41].Most reported research on tungsten-rhenium alloys shows the combined effects of rhenium alloying and thermomechanical …
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