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

After a historic excursus the basic properties of rhenium are summarized, followed by selected classes of its compounds (halides and oxyhalides, oxides, …Web

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

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 …Web

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

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

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

The addition of rhenium in tungsten not only improves the low temperature duc-tility of tungsten, but also increases its high tempera-ture creep strength. The combined beneficial effect of rhenium on tungsten makes rhenium also an essential element for many particle strengthened tungsten alloys such as W-Re-HfC and W-Re-ThO 2. In these alloys,Web

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

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

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

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

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

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

The balance of these tungsten-rhenium alloys improves with an increase in rhenium concentrations, and this is the reason why tungsten-rhenium alloy has 27% rhenium, which is their solubility limit. Addition of rhenium to tungsten makes it possible for the composites to meet specific functions like improved ductility, higher resistivity, and ...Web

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

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

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

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

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

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

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

Although the solubility of rhenium in molybdenum allows for up to approximately 50 wt.% rhenium, the compositions in this present work were selected to study the effects of dilute amounts of rhenium in AM-produced alloys. Specimens were analyzed and compared based on chemical composition, room temperature flexural …Web

Selective dissolution of a tungsten (85 wt.%)–rhenium (15 wt.%) alloy with rhenium in hydrochloric acid at the temperature of 298 K and anodic polarization modes was carried out to develop a porous catalytic substrate and to recycle rare metals. The parameters of the effective selective anodic dissolution of the tungsten–rhenium alloy, …Web

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

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

To overcome these shortages, additional rhenium (Re) are needed and its composition range is usually from 1 to 25 wt%. Rhenium is well known to strongly affect the physical and chemical properties of tungsten. As for the thermal conductivities of W–Re alloys, limited literature [3, 7, 26] are found. It shows that the additional rhenium can ...Web

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

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

tility was observed only with the 1.0 percent rhenium alloy. These compared with tran-sition temperatures of 215 ° and 235 ° F for worked sheet of unalloyed arc- and electron-beam-melted tungsten, respectively. Transition temperatures for the arc-melted 26-percent-rhenium alloy and the electron-beam-melted 24-percent-rhenium alloy wereWeb

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

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