50 tesla pulsed magnets using a copper conductor externally reinforced with stainless steel

1988 ◽  
Vol 24 (2) ◽  
pp. 1055-1058 ◽  
Author(s):  
H. Jones ◽  
F. Herlach ◽  
J.A. Lee ◽  
H.M. Whitworth ◽  
A.G. Day ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Copper Conductor ◽  
Pulsed Magnets

Cu-Nb and Cu/stainless steel winding materials for high field pulsed magnets

2000 ◽  
Vol 10 (1) ◽  
pp. 1263-1268 ◽  
Author(s):  
V. Pantsyrnyi ◽  
A. Shikov ◽  
A. Vorobieva ◽  
N. Khlebova ◽  
I. Potapenko ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Field ◽  
Pulsed Magnets

The fabrication and characterisation of high strength copper/stainless steel conductors for pulsed magnets

1996 ◽  
Vol 32 (4) ◽  
pp. 2466-2469 ◽  
Author(s):  
M. Van Cleemput ◽  
H. Jones ◽  
M. van der Burgt ◽  
Y.M. Eyssa ◽  
H.-J. Schneider-Muntau
Keyword(s):  
Stainless Steel ◽  
High Strength ◽  
Pulsed Magnets

Design, Installation, Analysis and Testing of In-Vessel Magnetic Coils on J-TEXT Tokamak

2013 ◽  
Vol 281 ◽  
pp. 180-184
Author(s):  
Quan Lin Li ◽  
Yong Hua Ding ◽  
Bo Rao
Keyword(s):  
Stainless Steel ◽  
Epoxy Resin ◽  
Tokamak Plasma ◽  
Vacuum Vessel ◽  
Line Field ◽  
Copper Conductor ◽  
Steel Jacket ◽  
Magnetic Coils ◽  
Magnetic Perturbations ◽  
Resonant Magnetic Perturbations

In this paper, a set of 12 in-vessel resonant magnetic perturbation coils are designed for the J-TEXT to investigate the interactions between external resonant magnetic perturbations (RMPs) and a tokamak plasma. Since the coils will be fed with AC 10kA/10kHz and mounted inside the vacuum vessel where the pressure is E-7 Pa and the center-line field reaches 3 T, the coils design adopted and installed is a water-cooled hollow copper conductor insulated with polyamide and cured epoxy resin, and then housed inside a welded stainless steel jacket that forms a vacuum boundary. A solution of how the coils are connected to the power supply outside the vacuum in a limited space is also given in this paper. The primary challenge in the design of these coils is dressing the copper conductor with stainless steel jacket by welding without overheating the polyamide and cured epoxy resin insulator.

scholarly journals Experimental identification of the degree of deformation of a wire subjected to bending

2018 ◽  
Vol 50 (2) ◽  
pp. 183-191
Author(s):  
I. Milicevic ◽  
M. Popovic ◽  
N. Ducic ◽  
R. Slavkovic ◽  
S. Dragicevic ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Stainless Steel ◽  
Electromotive Force ◽  
Steel Wire ◽  
Stainless Steel Wire ◽  
Force Coefficient ◽  
Thermal Electromotive Force ◽  
Degree Of Deformation ◽  
Copper Conductor ◽  
Wire Specimen

This study provides experimental verification of analytical results on maximum strain ?max in elements fabricated by bending a stainless steel wire around a cylinder with given dimensions. The method of measuring the thermal electromotive force (TEMF) of a thermocouple formed by joining the deformed metal specimen to a copper (Cu) conductor showed an increase in the thermal electromotive force coefficient (TEMFC) during heating with increasing degree of plastic deformation. For known values of plastic deformation produced by straining X5CrNi1810 stainless steel wire specimens of ?2.8 mm diameter, the TEMF was determined as a function of the extent of deformation of the thermocouple consisting of the deformed steel wire specimen and the copper conductor. Based on the correlation (calibration curve), it was shown that the relative strain of the element fabricated by bending the same wire (made of X5CrNi1810 stainless steel, ?2.8 mm in diameter) around the cylinder of ?10 mm diameter is 23.8 %.

Copper/stainless steel conductor for high field pulsed magnets

1996 ◽  
Vol 216 (3-4) ◽  
pp. 226-229 ◽  
Author(s):  
M. Van Cleemput ◽  
H. Jones ◽  
M. van der Burgt ◽  
J-R. Barrau ◽  
J.A. Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Field ◽  
Pulsed Magnets

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

Comparison of Recovery and Recrystallization in Stainless Steel Following Plane-Wave Shock Loading and Explosive Forming

1970 ◽  
Vol 28 ◽  
pp. 428-429 ◽  
Author(s):  
J. A. Korbonski ◽  
L. E. Murr
Keyword(s):  
Stainless Steel ◽  
Shock Loading ◽  
Pressure Pulse ◽  
Shock Pressure ◽  
304 Stainless Steel ◽  
Strain Rates ◽  
Two Dimensional ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Explosive Forming

Comparison of recovery rates in materials deformed by a unidimensional and two dimensional strains at strain rates in excess of 104 sec.−1 was performed on AISI 304 Stainless Steel. A number of unidirectionally strained foil samples were deformed by shock waves at graduated pressure levels as described by Murr and Grace. The two dimensionally strained foil samples were obtained from radially expanded cylinders by a constant shock pressure pulse and graduated strain as described by Foitz, et al.

Some aspects of the defect structure in an austenitic stainless steel

1978 ◽  
Vol 36 (1) ◽  
pp. 314-315
Author(s):  
R. Gonzalez ◽  
L. Bru
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Cellular Structures ◽  
Total Strain Amplitude ◽  
Total Deformation ◽  
Density Of Dislocations ◽  
Planar Arrays ◽  
Stacking Fault Tetrahedra ◽  
Distribution Of Dislocations ◽  
Very High

The analysis of stacking fault tetrahedra (SFT) in fatigued metals (1,2) is somewhat complicated, due partly to their relatively low density, but principally to the presence of a very high density of dislocations which hides them. In order to overcome this second difficulty, we have used in this work an austenitic stainless steel that deforms in a planar mode and, as expected, examination of the substructure revealed planar arrays of dislocation dipoles rather than the cellular structures which appear both in single and polycrystals of cyclically deformed copper and silver. This more uniform distribution of dislocations allows a better identification of the SFT.The samples were fatigue deformed at the constant total strain amplitude Δε = 0.025 for 5 cycles at three temperatures: 85, 293 and 773 K. One of the samples was tensile strained with a total deformation of 3.5%.

Pyrolytic carbon filaments and associated catalytic particles formed in steel tubes

1984 ◽  
Vol 42 ◽  
pp. 662-663
Author(s):  
Y. L. Chen ◽  
J. R. Bradley
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Catalyst Particle ◽  
Pyrolytic Carbon ◽  
Plain Carbon Steel ◽  
304 Stainless Steel ◽  
Hydrocarbon Gases ◽  
Steel Tubes ◽  
Filamentous Carbon ◽  
Carbon Filaments

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.

Preparation of Electron Transparent Metal-Matrix Composites

1968 ◽  
Vol 26 ◽  
pp. 334-335 ◽  
Author(s):  
M. R. Pinnel ◽  
A. Lawley
Keyword(s):  
Stainless Steel ◽  
Load Transfer ◽  
Volume Fraction ◽  
Steel Wire ◽  
Initial Step ◽  
Interfacial Region ◽  
Matrix Composites ◽  
Specific Test ◽  
The Matrix ◽  
The One

Numerous phenomenological descriptions of the mechanical behavior of composite materials have been developed. There is now an urgent need to study and interpret deformation behavior, load transfer, and strain distribution, in terms of micromechanisms at the atomic level. One approach is to characterize dislocation substructure resulting from specific test conditions by the various techniques of transmission electron microscopy. The present paper describes a technique for the preparation of electron transparent composites of aluminum-stainless steel, such that examination of the matrix-fiber (wire), or interfacial region is possible. Dislocation substructures are currently under examination following tensile, compressive, and creep loading. The technique complements and extends the one other study in this area by Hancock.The composite examined was hot-pressed (argon atmosphere) 99.99% aluminum reinforced with 15% volume fraction stainless steel wire (0.006″ dia.).Foils were prepared so that the stainless steel wires run longitudinally in the plane of the specimen i.e. the electron beam is perpendicular to the axes of the wires. The initial step involves cutting slices ∼0.040″ in thickness on a diamond slitting wheel.

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