Influence of roughness and composition on the total emissivity of tungsten, rhenium and tungsten-25% rhenium alloy at high temperature. J. Alloys Compds. (2014) ... During the atmospheric reentry of thruster pieces at high velocity, the Haynes 25 alloy is submitted to high temperatures in an extreme environment with atomic oxygen. This is …Web
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Rhenium is a metal with one of the highest melting points of all the elements, exceeded by only tungsten and carbon. The general thermodynamic properties of rhenium are summarized in Table 4.1.For the molar heat capacity c p = f(T, K), J mol −1 K −1, the following relationship is recommended for the range of temperatures from 298 to 2500 K []Web
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point, thus forming alloys with high melting point and good ductility. Because of the high melting point of tungsten-based alloys, it is impossible to produce tungsten-based alloys by traditional ...Web
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Results of al-loying rhenium into 316L alloy was done by consolidation of 316L and rhenium powders and processing of such prepared mixtures with the use of selective laser melting technology. The ...Web
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Rhenium alloys are used in nuclear reactors, semiconductors, thermocouples, electronic tube components, gyroscopes, parts for rockets, electrical contacts, thermionic …Web
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Rhenium Alloys has the expertise and equipment to handle many industrial metal services, including Cold Isostatic Pressing, Heat-Treating (Annealing and Sintering), Swaging, …Web
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Abstract. Some reports on the mechanical testing of pure in monotonic tension, hardness, and stress-controlled fatigue tests of sintered rhenium. The results of …Web
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Nickel-based single-crystal superalloys are the key materials for the manufacturing and development of advanced aeroengines. Rhenium is a crucial alloying element in the advanced nickel-based single-crystal superalloys for its special strengthening effects. The addition of Re could effectively enhance the creep properties of the single …Web
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Rhenium Alloys Inc. (RAI) was introduced to the friction stir welding (FSW) process by The Welding Institute (TWI) in early 1999 with the application of FSW of commercially pure titanium. At that time, RAI only produced tungsten 25% Rhenium (W25%Re) wire at (0.25 -0.5 mm) diameter for type C and D thermocouple wire.Web
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In low-power SNRPSs, 316-stainless steel has been a suitable structure material for operating at ⩽923 ... Molybdenum–rhenium alloys, developed to remedy the lack of ductility of pure molybdenum at low temperatures, and to increase creep strength [19] and the resistance to oxygen embrittlement, are stronger but much heavier than niobium ...Web
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tungsten-rhenium alloys in the temperature range 77O to 810' K. The ductile-brittle transition temperature of the unalloyed recrystallized tungsten prepared for this study was 490' K and was reduced to 430' and 350' K by additions of 2 and 25 percent rhenium (Re), respectively. The temperature and strain rate dependence of the yield stress ofWeb
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A method for obtaining rhenium and other metals from rhenium-containing materials, for example, alloy residues, ore materials, and metal-ceramic catalysts, was proposed by M. L. Henkens . All metals in rhenium-containing materials can be dissolved in an HCl solution or a mixture of HCl and HNO 3, forming their corresponding hydrous salt.Web
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Rhenium alloys were used in crucibles, electrical contacts, electromagnets, electron tubes and targets, heating elements, ionization gauges, mass spectrographs, metallic coatings, semiconductors, temperature controls, thermocouples, vacuum tubes, and other applications. The value of rhenium consumed in 2019 was about $65 millionWeb
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The paper presents the results of studies of electrochemical processing of large pieces of metal wastes of rhenium-containing heat-resistant nickel alloys (HRNA) with subsequent processing of the products of electrolysis. It shows the possibility of electrochemical processing of large (up to 2 kg) scrap pieces, without preliminary grinding, in sulfuric acid …Web
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This article presents an overview of publications on mechanical properties of chromium and chromium-based alloys, with particular emphasis on ductility at low temperature and strength at high temperature. Analysis of rather scattered data suggests that a chromium or chromium-based alloy can be ductilized at ambient temperature and is quite capable of …Web
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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 processing [40, 41, 48, 50]. The effect of thermomechanical processing will be examined in more detail in ...Web
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Two alloys were melted by the vacuum induction technique and turned into master alloys, and then directionally solidified into bars (16 mm in diameter and 230 mm long). All the bars were within 5° off [001] orientation by the macro-corrosion and electron backscatter diffraction (EBSD). ... Influence of small rhenium additions on the lattice ...Web
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The effect of grain size on the DBTT for molybdenum alloys is presented in Fig. 2, which displays data for unalloyed powder metallurgy molybdenum (PM–Mo), ODS Mo with 2 and 4 volume percent oxide, and binary molybdenum–rhenium (Mo–Re) alloys in both the worked/stress-relieved condition as well as in the recrystallized condition. For a ...Web
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Tungsten rhenium alloy is widely used in aerospace, weapon electronics, and other high-temperature fields. W25Re alloy bars were prepared by powder metallurgy combined with the rolling deformation process. The mechanical properties of W25Re alloy were studied. The results show that rolled W25Re alloy bars have excellent mechanical …Web
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316.7: W-25 %Re: 283: ... and tensile strength (σm) differs between pure tungsten single crystals and tungsten-rhenium alloys (0 %, 5 %, 10 %, and 25 % at %Re). For pure tungsten, as the temperature increases, all mechanical properties (E, σe, and σm) decrease. Interestingly, these values continue to decline even further with higher ...Web
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After a historic excursus the basic properties of rhenium are summarized, followed by selected classes of its compounds (halides and oxyhalides, oxides, …Web
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The mechanism of electrochemical reactions of rhenium species at stainless steel 316 electrodes and the effect of the pH in 0.5 M (NH4)(2)SO4 solutions containing 5 mM HReO4 (pH 1, 3, and 10) were ...Web
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Compared with NbTaW 0.4 alloy, the yield strength of NbTaW 0.4 C 0.25 alloy and Re 0.1 NbTaW 0.4 C 0.25 alloy increased by 316.6% and 233.3% at 1450 ℃, respectively. Re element can affect the morphology, quantity and distribution of Ta 2 C phase. Consequently, element Re shows an antagonistic effect on the enhancement of …Web
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The elemental composition of the untreated W-25Re alloy was analyzed using X-ray fluorescence spectroscopy (XRF, Rigaku, ZSX Primus II) and is detailed in Table 1. The tungsten and rhenium content was approximately 74.8 wt% and 25.2 wt%, respectively, not including impurities.Web
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The friction coefficients of the composite coatings are reduced by 6.8 %–21.6 % and 13.2 %–32.4 % compared with those of the Ni-base alloy coatings and the aluminum alloys, while the wear ...Web
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Other rhenium alloys (with tungsten or molybdenum) are used for filaments, grid heaters, cathode cups, and igniter wires in photoflash bulbs. Rhenium has been used as a heat exchanger material for a solar rocket, nozzles for rocket thrusters, and in high temperature thermocouples. Also, rhenium is unique among refractory metals in that it …Web
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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 …Web
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OH. 44035-6200. FX: 888-366-9830. TF: 888-743-6486. Rhenium Alloys, Inc. is a leading manufacturer of refractory metals and high temperature products, Made in USA in …Web
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Abstract. The ability of platinum and certain of its alloys to function effectively as structural materials for long periods in air at temperatures above 1400°C ensures for these materials a remarkable position in a variety of industrial processes. The physical characteristics of the platinum metal group are reviewed in this paper and ...Web
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North Ridgeville, Ohio 44039, US. Get directions. RHENIUM ALLOYS, INC. | 298 followers on LinkedIn. Rhenium Alloys Inc. is a leading manufacturer of refractory metals and specialty fabricated ...Web
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Friction stir welding (FSW) of high-melting temperature alloys, such as steel and Inconel, requires tooling that can survive under the applied loads at the elevated temperatures. Tungsten-Rhenium (W-Re) alloys are a suitable candidate for this application; however, the costs typically associated with achieving the required densities …Web
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Textures in Molybdenum-Rhenium alloys are inevitable during thermal fabrication. ... an ultimate tensile strength (UTS) of nearly 1400 MPa and Young's modulus of 320 GPa in comparison to 316 L ...Web
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The toughness of 20Zr-2 C alloy is the highest, and its K Q value reaches 14.05 MPa·m 1/2, compared with the matrix alloy (20Zr alloy) increased by 23.46%. The enhancement of Nbss phase fraction and petal shaped microstructure make the crack propagation more difficult, thus increasing the K Q value of the 20Zr-2C alloy.Web
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The single-phase chi extends from 64 to 87% at 2200 deg C and undergoes a peritectic decomposition at 2720 deg C. At low temperatures, a peritectoid reaction is responsible for the appearance of a phase corresponding to ReCb. Its decomposition temperature is 1075 deg C. The solubility of niobium in rhenium is about 4% at 2720 and less than 2% ...Web
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Rhenium Alloys, Inc. 38683 Taylor Parkway. North Ridgeville. OH. 44035-6200. FX: 888-366-9830. TF: 888-743-6486. Rhenium Alloys, Inc. is a leading manufacturer of refractory metals and high temperature products, Made in USA in Cleveland, Ohio. Best source for Rhenium, Molybdenum, Tungsten, and alloys Molybdenum-Rhenium, Tungsten-Copper ...Web
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