About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Printability of Nickel Alloy 718 Using a Systematic Process Optimization Framework with Different Layer Thicknesses |
Author(s) |
David Shoukr, Peter Morcos, Tayler Sundermann, Raymundo Arroyave, Ibrahim Karaman, Alaa Elwany |
On-Site Speaker (Planned) |
David Shoukr |
Abstract Scope |
Laser-powder bed fusion is used in the literature to fabricate nickel alloy 718 successfully. However, the selection of the process parameters was based on experimentally-intensive methods or computationally-expensive simulations. Hence, these methods can test only a small region of the parameter space. Moreover, studies combine the process parameters into linear or volumetric energy densities. Both factors have proven to provide partial information about the part and inconsistent mechanical properties and microstructures.
The current framework covers the entire scanning speed-laser power space, determines the hatch spacing, and detects the printability region which is the porosity-free region determined by the elimination of the porosity defects. Furthermore, layer thicknesses of 60 and 90 μm are investigated to increase the volumetric build rate (VBR).
Printability is assessed using porosity measurements while performance is evaluated using tensile tests. Fully-dense parts were fabricated with tensile strengths and VBR of up to 1063.5 MPa and 7.10 mm3/s. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |