Properties of tungsten-rhenium alloys

Savitskii, E.M.; Tylkina, M. A.; Ipatova, S. I.; Pavlova, E. I.

doi:10.1007/bf00649725

Cited by 32 publications

(10 citation statements)

References 1 publication

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“…It has been reported that the recrystallization temperature of W is increased by the addition of Re. 17) These results show that the WRe (HR) alloys with Re contents of 326% were in a stress-relieved state and that the WRe (HT: 1600) alloys were in a fully recrystallized state.…”

Section: Methodsmentioning

confidence: 67%

Effects of Re Content and Fabrication Process on Microstructural Changes and Hardening in Neutron Irradiated Tungsten

et al. 2012

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The effects of the material fabrication process and rhenium (Re) content on the irradiation-induced changes in the microstructure and hardness of pure tungsten (W) and WRe alloys were investigated. Neutron irradiation of pure W and WRe alloys (Re concentration 326%) was carried out in the experimental fast reactor JOYO. The irradiation conditions were 0.44 displacement per atom (dpa) at 531°C and 0.47 dpa at 583°C for pure W and WRe alloys, respectively. After irradiation, microstructural observations using a transmission electron microscope (TEM) and Vickers microhardness tests were performed.Voids and dislocation loops were observed in both pure W and WRe alloys after irradiation. The number density of voids in pure W was higher than that in W3%Re, W5%Re and W10%Re. Only in the case of W26%Re irradiated to 0.47 dpa at 583°C were there no voids observed, but irradiation-induced fine precipitates and a few dislocation loops were observed. The irradiation hardening of pure W was greater than that of the WRe alloys. It was considered that irradiation hardening of pure W was caused mainly by the higher number density of voids. The addition of Re suppressed void formation and irradiation hardening of the WRe alloys. Irradiation hardening of W was also suppressed in hot-rolled W compared with arc-melted as-cast W.

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Section: Methodsmentioning

confidence: 67%

Effects of Re Content and Fabrication Process on Microstructural Changes and Hardening in Neutron Irradiated Tungsten

et al. 2012

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“…Rhenium is not only one of the major transmutation elements of W but it also has positive effects; e.g., it increases the recrystallization temperature, decreases the ductile-brittle transition temperature (DBTT), and suppresses the formation of irradiation-induced defect clusters [5][6][7][8]. Thus, pure W and W-3, 5, 10, and 26%Re alloys were investigated in this work.…”

Section: Methodsmentioning

confidence: 98%

Microstructural development of tungsten and tungsten–rhenium alloys due to neutron irradiation in HFIR

Fukuda

Yabuuchi

Nogami

et al. 2014

Journal of Nuclear Materials

134

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“…W-Re (tungstenrhenium) alloys are often used in fabricating the metallic wires for their excellent refractory properties [Savitskii et al, 1960]. A SEM grid in the form of an array Chapter 2.…”

Section: Secondary Electron Emission (Sem) Gridsmentioning

confidence: 99%

Development of a PET cyclotron based irradiation setup for proton radiobiology

et al. 2015

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An out-of-yoke irradiation setup using the proton beam from a cyclotron that ordinary produces radioisotopes for positron emission tomography (PET) has been developed, characterized, calibrated and validated. The current from a 20 µm thick aluminum transmission foil is readout by home-made transimpedance electronics, providing online dose information. The main monitoring variables, delivered in real-time, include beam current, integrated charge and dose rate. Hence the dose and integrated current delivered at a given instant to an experimental setup can be computercontrolled with a shutter. In this work, we report on experimental results and Geant4 simulations of a setup which exploits for the first time the 18 MeV proton beam from a PET cyclotron to irradiate a selected region of a target using the developed irradiation system. By using this system, we are able to deliver a homogeneous beam on targets with 18 mm diameter, allowing to achieve the controlled irradiation of cell cultures located in biological multi-well dishes of 16 mm diameter. We found that the magnetic field applied inside the cyclotron plays a major role for achieving the referred to homogeneity. The quasi-Gaussian curve obtained by scanning the magnet current and measuring the corresponding dose rate must be measured before any irradiation procedure, with the shutter closed. At the optimum magnet current, which corresponds to the center of the Gaussian, a homogenous dose is observed over the whole target area. Making use of a rotating disk with a slit of 0.5 mm at a radius of 150 mm, we could measure dose rates on target ranging from 500 mGy/s down to 5 mGy/s. For validating the developed irradiation setup, several Gafchromic R EBT2 films were exposed to different values of dose. The absolute dose in the irradiated films were assessed in the 2D film dosimetry system of the Department of Radiotherapy of Coimbra University Hospital Center with a precision better than 2%. In the future, we plan to irradiate small animals, cell cultures, or other materials or samples.

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Properties of tungsten-rhenium alloys

Cited by 32 publications

References 1 publication

Effects of Re Content and Fabrication Process on Microstructural Changes and Hardening in Neutron Irradiated Tungsten

Effects of Re Content and Fabrication Process on Microstructural Changes and Hardening in Neutron Irradiated Tungsten

Microstructural development of tungsten and tungsten–rhenium alloys due to neutron irradiation in HFIR

Development of a PET cyclotron based irradiation setup for proton radiobiology

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