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A mechanism of microcrater formation in metallic material irradiated by a low-energy high-current electron beam

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Abstract

Experiments with stainless steel (304L grade) samples exposed to microsecond pulses of high-current low-energy (10–30 keV) electron beam have been performed to determine dependences of the morphology, average diameter, and density of irradiation-induced microcraters on the beam energy density. A mechanism is proposed, according to which the crater formation is caused by radial spreading of the melt from the site of localization of a MnS inclusion under the action of the surface tension gradient caused by overheating of the inclusion. Estimations of the dimensions of microcraters are in satisfactory agreement with experimental data.

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Authors and Affiliations

  1. Institute of High-Current Electronics, Siberian Branch, Russian Academy of Sciences, Tomsk, 634055, Russia

    G. E. Ozur & D. I. Proskurovsky

  2. Tomsk State Pedagogical University, Tomsk, 634061, Russia

    V. P. Rotshtein

Authors
  1. G. E. Ozur
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  2. D. I. Proskurovsky
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  3. V. P. Rotshtein
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Corresponding author

Correspondence to G. E. Ozur.

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Original Russian Text © G.E. Ozur, D.I. Proskurovsky, V.P. Rotshtein, 2016, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2016, Vol. 42, No. 6, pp. 97–103.

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Ozur, G.E., Proskurovsky, D.I. & Rotshtein, V.P. A mechanism of microcrater formation in metallic material irradiated by a low-energy high-current electron beam. Tech. Phys. Lett. 42, 328–331 (2016). https://doi.org/10.1134/S1063785016030275

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  • DOI: https://doi.org/10.1134/S1063785016030275

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