Numerical investigation of the thermal transformation of composition powder particles in the technology of selective laser melting

7th International Conference for Young Scientists "High Technology: Research and Applications"

工业技术（总论）

Bogdanovich, V.I.^1 ; Giorbelidze, M.G.^1

Samara National Research University, Moskovskoe Highway 34, Samara

443086, Russia^1

关键词: High-quality materials;    Material thermophysical parameters;    Nickel-Chromium alloys;    Numerical investigations;    Process regularities;    Spherical particle;    Standard finite element;    Thermal transformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/510/1/012005/pdf
DOI  :  10.1088/1757-899X/510/1/012005

学科分类：工业工程学

来源: IOP

【 摘 要 】

The results of mathematical model development for evaluation of thermal state of spherical particles of powder composition equally treated in the technology of selective laser melting are presented. This model considers: features of laser irradiation energy transfer to the particles having smaller size but comparable with the size of radiation spot diameter; energy transfer through the sphere upper half; material melting in the solidus and liquidus range; possibility of surface material evaporation and dependence of material thermophysical parameters on temperature. This model is adapted to be used in standard finite-element software ANSYS Transient Thermal that has been applied for numerical simulation using powder of heat-resistant nickel-chromium alloy. Process regularities have been discovered, and it was shown that the range value of particles size scatter of powder composition fraction used determines principle possibility of choosing laser treatment mode to provide high quality material after melting.