Title: Investigation on occurrence of elevated edges in Selective Laser Melting
Authors: Yasa, Evren ×
Deckers, Jan
Craeghs, Tom
Badrossamay, Mohsen
Kruth, Jean-Pierre #
Issue Date: Aug-2009
Host Document: Twentieth Annual International Solid Freeform Fabrication Symposium
Conference: SFF Symposium location:Austin, Texas, USA date:3-5 August, 2009
Abstract: Selective laser melting (SLM) is a layer-wise material additive process for the direct
fabrication of functional metallic parts. During the process, successive layers of metal powder are
fully molten and consolidated on top of each other by the energy of a high intensity laser beam.
The process is capable of producing almost fully dense three-dimensional parts having
mechanical properties comparable to those of bulk materials. However, one of the problems
encountered in SLM process is the occurrence of the elevated ridges of the solidified material at
the edges of the successive layers. Those ridges reduce the dimensional accuracy and deteriorate
topology of the top surface. The edge-effect problem is encountered not only in SLM, but also in
other production techniques applying melting processes such as LENS™ (The Laser Engineered
Net Shaping) and EBM (Electron Beam Melting). In this study, the reasons for the elevated edges
and solutions to this problem are investigated and reported. Different scan strategies as well as
different hatching and contour parameters are tested to reduce the edge-effect problem. Besides,
the influence of applying laser re-melting in combination to selective laser melting has been
investigated. It turns out that re-melting layers deposited by SLM improves the part density and
surface roughness, but creates on its own elevated edges.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Production Engineering, Machine Design and Automation (PMA) Section
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
Yasa_SFF2009_Investigation on occurrence of elevated edges in SLM.pdf Published 1369KbAdobe PDFView/Open Request a copy
Yasa_SFF2009_Investigation on occurrence of elevated edges in SLM.doc Published 3027KbMicrosoft WordView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.