A mechanism of microcrater formation in metallic material irradiated by a low-energy high-current electron beam
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.
- Publication:
-
Technical Physics Letters
- Pub Date:
- March 2016
- DOI:
- 10.1134/S1063785016030275
- Bibcode:
- 2016TePhL..42..328O