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Park, Hyung Wook
Multiscale Hybrid Manufacturing Lab
Research Interests
  • Multiscale hybrid manufacturing process

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Surface modifications to grooved SM45C mold steel plates using large-electron-beam polishing

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Title
Surface modifications to grooved SM45C mold steel plates using large-electron-beam polishing
Author
Kim, Dong MinPark, EunjuPark, Hyung Wook
Keywords
Electron-beam irradiations; Groove depth; Metal surfaces; Microstructure variations; Mold steel; Polished surfaces; Polishing processs; Surface hardness; Water repellency
Issue Date
201205
Publisher
SAGE PUBLICATIONS LTD
Citation
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE, v.226, no.B5, pp.950 - 954
Abstract
In this study, a recently developed electron-beam polishing process was adopted to improve the surface quality of grooved SM45C mold steel plates. A large electron beam with a maximum diameter of 60mm was used to instantly melt and evaporate the metal surface in a few microseconds to observe its effect on surface hardness, surface roughness, water repellency, and microstructure variation. The effects of the groove depth and width on the plate were also experimentally observed. The surface polished by the electron beam became smoother, but as the groove depth increased, the effect of the large-electron-beam polishing decreased. Although the surface hardness dropped by approximately 20% on the re-solidified layer, the contact angle increased after the electron-beam irradiation. The microstructure variation on the polished surface was also examined.
URI
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DOI
http://dx.doi.org/10.1177/0954405411431026
ISSN
0954-4054
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