Analysis of the e-beam evaporation of titanium and Ti-6Al-4V

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An experimental and finite element analysis was performed for the electron-beam evaporation of Ti and Ti-6Al-4V from a bottom-feed system. The bulk evaporation rate was measured by feed consumption, and the pool elevation was held constant by adjusting the feed rate in a closed-loop control system. The instantaneous titanium and aluminum evaporation rates were determined by laser absorption in the vapor plume. Water temperature rises in cooling water circuits provided heat flows, and post-run cross sections revealed the location of the solidification zone. The MELT finite element code was applied to model the steady-state two-dimensional fluid flow and energy transport ... continued below

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16 p.

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Westerberg, K.W.; Merier, T.C.; McClelland, M.A.; Braun, D.G.; Berzins, L.V.; Anklam, T.M. et al. February 11, 1998.

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An experimental and finite element analysis was performed for the electron-beam evaporation of Ti and Ti-6Al-4V from a bottom-feed system. The bulk evaporation rate was measured by feed consumption, and the pool elevation was held constant by adjusting the feed rate in a closed-loop control system. The instantaneous titanium and aluminum evaporation rates were determined by laser absorption in the vapor plume. Water temperature rises in cooling water circuits provided heat flows, and post-run cross sections revealed the location of the solidification zone. The MELT finite element code was applied to model the steady-state two-dimensional fluid flow and energy transport in the rod. There was good agreement between model and measured values of the heat flows and solidification boundaries for Ti. Measured bulk evaporation rates were similar for Ti and Ti-6-4 with greater variation observed for the Ti values. The model evaporation rates were higher than the measured values, but a similar linear dependence on e-beam power was observed in all cases. In a Ti-6-4 evaporation experiment with steady process conditions, laser absorption measurements showed much larger fluctuations in the evaporation rate for Al than Ti.

Physical Description

16 p.

Notes

OSTI as DE98057760

Other: FDE: PDF; PL:

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  • Electron beam melting and refining state of the art 1997 conference, Reno, NV (United States), 5-7 Oct 1997

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  • Other: DE98057760
  • Report No.: UCRL-JC--128692
  • Report No.: CONF-9710176--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 292592
  • Archival Resource Key: ark:/67531/metadc684059

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  • February 11, 1998

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  • July 25, 2015, 2:20 a.m.

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  • April 10, 2017, 2 p.m.

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Westerberg, K.W.; Merier, T.C.; McClelland, M.A.; Braun, D.G.; Berzins, L.V.; Anklam, T.M. et al. Analysis of the e-beam evaporation of titanium and Ti-6Al-4V, article, February 11, 1998; California. (digital.library.unt.edu/ark:/67531/metadc684059/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.