About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Investigation into Effect of Beam Defocusing in Low Temperature Laser Sintering of PEEK |
Author(s) |
Takashi Kigure, Yuki Yamauchi, Toshiki Niino |
On-Site Speaker (Planned) |
Takashi Kigure |
Abstract Scope |
Laser sintering of PEEK with the same powder bed temperature as PA12, which is lower than recrystallization temperature of PEEK, has been achieved at pervious study. However, the process at low bed temperatures requires a greater energy supply to melt the material, and it increases the risk of thermal decomposition. Expansion of spot size by defocusing is one of the effective ways to reduce the peak intensity of beam and allow providing more energy to the same laser irradiation range as avoiding the decomposition. In this study, specimens were prepared with the same amount of energy and difference beam diameters, to observe difference in internal voids and thermal decomposition of specimens. As a result, it was indicated that large spot size is effective on high energy supply without thermal decomposition and suppressing internal voids. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |