Contribution to Book
Proceedings of the International Conference on Mechanical, Materials and Manufacturing
The particle size distribution and powder morphology of metallic powders have an important effect on powder bed fusion based additive manufacturing processes, such as selective laser melting (SLM). The process development and parameter optimization require a fundamental understanding of the influence of powder on SLM. This study introduces a pre-alloyed titanium alloy Ti-6Al-4V powder, which has a certain amount of small particles, for SLM. The influence of small particle inclusion is investigated through microscopy of surface topography, elemental and microstructural analysis, and mechanical testing, compared to the Ti-6Al-4V powder provided by SLM machine vendor. It is found that the small particles inclusion in Ti-6Al-4V powder has a noticeable effect on extra laser energy absorption, which may develop imperfections and deteriorate the SLM fatigue performance.
Gong, Haijun, J. J.S. Dilip, Li Yang, Chong Teng, Brent Stucker.
"Influence of Small Particles Inclusion on Selective Laser Melting of Ti-6al-4v Powder."
Proceedings of the International Conference on Mechanical, Materials and Manufacturing, 272: 1-6: IOP Publishing.
doi: 10.1088/1757-899X/272/1/012024 source: https://iopscience.iop.org/article/10.1088/1757-899X/272/1/012024/meta