Open AccessEffect of Heat Input Parameters on Molten Pool Size during Selective Laser Melting of Ti-6Al-4V Powder Through Numerical Simulation
Author(s) -
Liang Zhang,
Kaiqi Wu,
Yang Qi-yun,
Xiaoqing Ni,
Tao Wang,
Wenheng Wu,
Lin Lü
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/730/1/012003
Subject(s) - selective laser melting , materials science , computer simulation , dimension (graph theory) , exponential function , melting temperature , laser , field (mathematics) , layer (electronics) , thermodynamics , mechanics , composite material , metallurgy , microstructure , optics , mathematical analysis , physics , mathematics , pure mathematics
Numerical simulations were proposed to research the influence of heat input parameters on the melting pool dimension and temperature field distribution during the selective laser melting process of Ti-6Al-4V powder. Firstly, temperature field results demonstrate that in the same powder layer, the center part of the sample will experience three more obvious heating processes under the irradiation of laser. Secondly, a good exponential function relationship is found between the melting pool dimension and volume energy density. Finally, based on the melting pool dimension from our numerical simulations, two full-process energy prediction diagrams are drawn to predict hatch spacing and powder layer thickness of SLM Ti-6Al-4V powder, consistent with the experimental results.