High Temperature

, Volume 38, Issue 1, pp 15–19 | Cite as

The mechanism of increase of the thickness of the zone of thermal effect during pulse-periodic treatment of a target by an electron beam

  • A. B. Markov
  • V. P. Rotshtein
Plasma Investigations
Received:

Abstract

Based on the results of numerical simulation of temperature fields, the reasons for the growth of the layer thickness of the zone of thermal effect in a target of 45 steel during pulse-periodic stimulation by a low-energy high-current electron beam in the mode of initial melting are analyzed. It is concluded that the growth of thickness of these layers is primarily caused by the spread of the beam energy density from pulse to pulse and by the presence of individual pulses with a higher-than-average value of energy density. It is shown that the variation of the thermal properties of steel, which occurs during irradiation due to the carbon saturation of the surface region of the target, results in the increase of the thickness of only those layers of the zone of thermal effect which are formed in the region of former melt. The dependence of the target temperature on the number of irradiation pulses is measured and calculated numerically. It is demonstrated that the increase of the target temperature has no noticeable effect on the growth of the thickness of the zone of thermal effect

Keywords

Energy Density Irradiation Pulse Target Temperature Background Temperature Individual Pulse 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • A. B. Markov
    • 1
  • V. P. Rotshtein
    • 1
  1. 1.Institute of High-Current Electronics, Siberian DivisionRussian Academy of SciencesTomskRussia

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