Manufacturing development of low activation vanadium alloys

Smith, J P; Johnson, W R; Baxi, C B

Title: Manufacturing development of low activation vanadium alloys

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Abstract

General Atomics is developing manufacturing methods for vanadium alloys as part of a program to encourage the development of low activation alloys for fusion use. The culmination of the program is the fabrication and installation of a vanadium alloy structure in the DIII-D tokamak as part of the Radiative Divertor modification. Water-cooled vanadium alloy components will comprise a portion of the new upper divertor structure. The first step, procuring the material for this program has been completed. The largest heat of vanadium alloy made to date, 1200 kg of V-4Cr-4Ti, has been produced and is being converted into various product forms. Results of many tests on the material during the manufacturing process are reported. Research into potential fabrication methods has been and continues to be performed along with the assessment of manufacturing processes particularly in the area of joining. Joining of vanadium alloys has been identified as the most critical fabrication issue for their use in the Radiative Divertor Program. Joining processes under evaluation include resistance seam, electrodischarge (stud), friction and electron beam welding. Results of welding tests are reported. Metallography and mechanical tests are used to evaluate the weld samples. The need for a protective atmosphere during different weldingmore »« less

Authors:: Smith, J P; Johnson, W R; Baxi, C B

Publication Date:: Tue Oct 01 00:00:00 EDT 1996

Research Org.:: General Atomic Co., San Diego, CA (United States)

Sponsoring Org.:: USDOE Office of Energy Research, Washington, DC (United States)

OSTI Identifier:: 442180

Report Number(s):: GA-A22382; CONF-9606116-91
ON: DE97003325; TRN: 97:005060

DOE Contract Number:: AC03-89ER51114

Resource Type:: Conference

Resource Relation:: Conference: Annual meeting of the American Nuclear Society (ANS), Reno, NV (United States), 16-20 Jun 1996; Other Information: PBD: Oct 1996

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION; 36 MATERIALS SCIENCE; VANADIUM BASE ALLOYS; MANUFACTURING; TITANIUM ALLOYS; CHROMIUM ALLOYS; TOKAMAK DEVICES; DIVERTORS; ELECTRON BEAM WELDING; FABRICATION; FRICTION; HEAT FLUX; HEAT TRANSFER; JOINING; MECHANICAL TESTS; METALLOGRAPHY

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                    Smith, J P, Johnson, W R, and Baxi, C B. Manufacturing development of low activation vanadium alloys.  United States: N. p., 1996. 
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                    Smith, J P, Johnson, W R, & Baxi, C B. Manufacturing development of low activation vanadium alloys.  United States.

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                    Smith, J P, Johnson, W R, and Baxi, C B. 1996.  
        "Manufacturing development of low activation vanadium alloys".  United States.  https://www.osti.gov/servlets/purl/442180.

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@article{osti_442180,

  title        = {Manufacturing development of low activation vanadium alloys},

  author       = {Smith, J P and Johnson, W R and Baxi, C B},

  abstractNote = {General Atomics is developing manufacturing methods for vanadium alloys as part of a program to encourage the development of low activation alloys for fusion use. The culmination of the program is the fabrication and installation of a vanadium alloy structure in the DIII-D tokamak as part of the Radiative Divertor modification. Water-cooled vanadium alloy components will comprise a portion of the new upper divertor structure. The first step, procuring the material for this program has been completed. The largest heat of vanadium alloy made to date, 1200 kg of V-4Cr-4Ti, has been produced and is being converted into various product forms. Results of many tests on the material during the manufacturing process are reported. Research into potential fabrication methods has been and continues to be performed along with the assessment of manufacturing processes particularly in the area of joining. Joining of vanadium alloys has been identified as the most critical fabrication issue for their use in the Radiative Divertor Program. Joining processes under evaluation include resistance seam, electrodischarge (stud), friction and electron beam welding. Results of welding tests are reported. Metallography and mechanical tests are used to evaluate the weld samples. The need for a protective atmosphere during different welding processes is also being determined. General Atomics has also designed, manufactured, and will be testing a helium-cooled, high heat flux component to assess the use of helium cooled vanadium alloy components for advanced tokamak systems. The component is made from vanadium alloy tubing, machined to enhance the heat transfer characteristics, and joined to end flanges to allow connection to the helium supply. Results are reported.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/442180},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Oct 01 00:00:00 EDT 1996},

  month        = {Tue Oct 01 00:00:00 EDT 1996}

}

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