Laser Surface Melting of Stainless Steel Anodes for Reduced Hydrogen Outgassing (Postprint)

Anodes of 304 stainless steel have been processed by a continuous wave Yb fiber laser with a wavelength of 1.064 m and subjected to 50 keV electron bombardment in order to determine the extent to which hydrogen outgassing is reduced by the laser surface melting treatment. The results show a reductio...

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Bibliographic Details
Main Authors: Gortat,D, Sparkes,M, O'Neill,W, Murray,P T, Back,T C, Gruen,G J, Fairchild,S B, Cahay,M M, Lockwood,N P
Format: Report
Language:English
Subjects:
anodes
continuous waves
electron beams
ELECTRONICS
grain boundaries
grain growth
hps(High Power Source)
Hydrogen
laser beams
Laser processing
laser spots
Lasers and Masers
Metallurgy and Metallography
METALS
Metals and alloys
optical fiber lasers
outgassing
SELECTIVE LASER MELTING
stainless steel
surface roughness
Vacuum electronics
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Summary:Anodes of 304 stainless steel have been processed by a continuous wave Yb fiber laser with a wavelength of 1.064 m and subjected to 50 keV electron bombardment in order to determine the extent to which hydrogen outgassing is reduced by the laser surface melting treatment. The results show a reduction in outgassing, by approximately a factor of four compared to that from untreated stainless steel. This is attributed to a reduction in the number of grain boundaries which serve as trapping sites for hydrogen in stainless steel. Such laser treated anodes do not require post-processing to preserve the benefits of the treatment and are excellent candidates for use in high power source devices. Materials Letters , 190, 01 Jan 0001, 01 Jan 0001, This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).