Grain refinement in beryllium by equal channel angular extrusion.

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Description

Ultrafine-grained Be is the material of choice for fabrication of the NIF target capsules. One method of producing ultrafine grains in metals is by imposing very large strains. Equal channel angular extrusion (ECAE) has been used to achieve these high strains. Previous work has shown that powder-source Be can be successfully processed by ECAE. Pure Be and Be-0.9 at% Cu alleys have been arc melted and cast into billets 5 mm in diameter by 30 mm in length. These billets were enclosed in cans fabricated from commercial purity Ni, with an electron-beam welded end plug. These cans were extruded at ... continued below

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1 p.

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Alexander, D. J. (David J.); Mauro, M. E. (Michael Ernest); Cooley, J. C. (Jason C.) & Dauelsberg, L. B. (Lawrence B.) January 1, 2003.

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Description

Ultrafine-grained Be is the material of choice for fabrication of the NIF target capsules. One method of producing ultrafine grains in metals is by imposing very large strains. Equal channel angular extrusion (ECAE) has been used to achieve these high strains. Previous work has shown that powder-source Be can be successfully processed by ECAE. Pure Be and Be-0.9 at% Cu alleys have been arc melted and cast into billets 5 mm in diameter by 30 mm in length. These billets were enclosed in cans fabricated from commercial purity Ni, with an electron-beam welded end plug. These cans were extruded at 425C in ECAE tooling with a 120' angle between the inlet and outlet channels. The billets were extruded up to 4 times. The microstructures of the powdersource Be and the arc-melted Be and Be-0.9 at% Cu materials will be presented, and the effects of the ECAE processing on the grain size will be discussed.

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1 p.

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  • Submitted to: 15th Target Fabrication Specialists Meeting, Gleneden Beach, OR, June 1-5, 2003

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  • Report No.: LA-UR-03-3171
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976660
  • Archival Resource Key: ark:/67531/metadc926412

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 2003

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 9, 2016, 11:39 p.m.

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Alexander, D. J. (David J.); Mauro, M. E. (Michael Ernest); Cooley, J. C. (Jason C.) & Dauelsberg, L. B. (Lawrence B.). Grain refinement in beryllium by equal channel angular extrusion., article, January 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc926412/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.