電子ビームによる物質表面加熱の数値解析

概要

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The method of numerical analysis is investigated for the maunfacturing processes by means of electron beam heating such as hardening, cutting and welding. The high-energy electrons (10-50keV)impinge upon the surface of the material and diffuse through multiple elastic/nonelastic scattering with atoms. Although the electron collisions with atomic nuclei acn approximately be treated as elastic ones, the collision with the orbital electrons of atoms is a nonelastic one. The fast electrons are decelerated in the course of the atomic excitation or X-ray radiation, transferring their kinetic energy into the lattice system as heat energy. Here, the difference between the heat generating density and the electron density is clarified numerically, as are the penetration depth and reflection ratio of the electron beam, which give good agreement with the referenced data. Furthermore, the difference between the penetration depth of the electrons and that of the heat, which has never before been discussed in detail, is clarified.
社団法人日本機械学会の論文
1990-11-25