E. V. Krasnova, Yu. A. Morgunov, B. P. Saushkin, N. V. Khomyakova
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引用次数: 0
摘要
研究了由 Ti-6Al-4V 合金粉末经选择性电子束熔化制成的样品材料的孔隙率。通过光学显微镜和 X 射线计算机断层扫描研究了孵化模式参数对样品孔隙率的影响。对孔隙的形状和大小进行了定性和定量评估，并完善了孔隙形成的技术因素。结果表明，大的不连续性主要形成于距离样品表面最多 2 毫米的轮廓区和孵化区的重叠区域。在表层没有检测到孔隙的选择性形成。研究发现，在 180-300 J/m 的电子束线性能量密度范围内，孔隙率最小。
Porosity of Additive Manufacturing Products Obtained by Selective Electron Beam Melting
The porosity of the material of samples manufactured by selective electron beam melting from Ti–6Al–4V alloy powders was studied. The influence of parameters of the hatching mode on the porosity of the samples was investigated by optical microscopy and X-ray computed tomography. The shapes and sizes of pores were qualitatively and quantitatively assessed, and the technological factors contributing to the formation of pores were refined. It was shown that large discontinuities are formed mainly in the overlapping area of the contouring and hatching zones at a distance of up to 2 mm from the sample surface. Selective formation of pores in the surface layer was not detected. It was found that, in the range of linear energy densities of the electron beam of 180–300 J/m, the minimum porosity is achieved within this range.
期刊介绍：
Surface Engineering and Applied Electrochemistry is a journal that publishes original and review articles on theory and applications of electroerosion and electrochemical methods for the treatment of materials; physical and chemical methods for the preparation of macro-, micro-, and nanomaterials and their properties; electrical processes in engineering, chemistry, and methods for the processing of biological products and food; and application electromagnetic fields in biological systems.
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