About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
The Laser Powder Bed Fusion Process Development of 17-4 PH Stainless Steels With Pulsed-Wave Lasers |
Author(s) |
Evren Yasa, Andac Ozsoy, Erkan Bugra Tureyen |
On-Site Speaker (Planned) |
Evren Yasa |
Abstract Scope |
The main advantage of using Selective Laser Melting is its unique capability to produce highly complex geometries even involving internal cavities and good mechanical properties. Besides other differences in powder coating and gas circulation among various SLM machines, the type of laser (continuous or pulsed wave) is the most critical one. In addition to several process parameters to be optimized for a specific material, pulsed-wave lasers bring extra factors to consider. In this work, a pulsed-wave laser was used to develop process parameters for 17-4 PH stainless steel while keeping volumetric energy density, laser power and velocity to understand the effect of pulse related parameters on the outputs. As the point distance between consecutive laser spots (PD) was increased, the exposure time was also raised to keep the scan speed constant. This enabled achieving PDs with one extreme end approaching to CW-lasers while the other end aiming at keyhole effect. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |