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

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Temperature predictive model of the large pulsed electron beam (LPEB) irradiation on engineering alloys

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Title
Temperature predictive model of the large pulsed electron beam (LPEB) irradiation on engineering alloys
Author
Kim, JisooLee, Woo JinPark, Hyung Wook
Keywords
Large pulsed electron beam;  Thermal modeling;  AbsorptanceTemperature
Issue Date
201801
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
APPLIED THERMAL ENGINEERING, v.128, no., pp.151 - 158
Abstract
The pulsed electron beam irradiation process is a relatively advanced technique for surface modification, including surface hardening, corrosion protection, and wear inhibition. Due to increasing demand for surface modification processes on solid metals, many experimental studies have focused on electron beam irradiation processes. In this study, a three-dimensional numerical model of the large electron beam irradiation with a Gaussian-distributed heat source was developed. To reflect the natural interactions between accelerated electrons and solid substrates, the absorptance of the electron beam was evaluated with considering electron scattering, backscattering, and transmission. Predictions of temperature distributions were validated by measuring molten depths of engineering alloys after the electron beam irradiation. The effects of absorptance on the prediction accuracy of the molten depth were also explored, and the computational results were compared based on constant and calculated absorptance versus depth. The consideration of energy absorbing mechanisms resulted in more accurate predictions of molten depths, as demonstrated by the strong agreement with experimental results.
URI
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DOI
http://dx.doi.org/10.1016/j.applthermaleng.2017.08.142
ISSN
1359-4311
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