 Images of gas atomized MAR-M-247 powder, sample1, size range: 45–106um [ref 15] | Some defects found in parts built using AM are related to processing parameters or to the composition of alloys optimised for more conventional, slow-cooling manufacturing process. These defects – such as porosity or cracking – can sometimes be healed by post-processing such as hot isostatic pressing (HIP). Yet, the formation of pores during AM is also linked to the quality of virgin powder. |
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Direct Laser Deposition (DLD) is a type of laser-based additive manufacturing process used to create functional metal components layer by layer using a sliced 3D CAD (computer aided drawing) file. Unlike Selective Laser Melting which utilizes a bed of powder metal that is ‘selectively’ melted via a laser, DLD is based on melting feedstock (blown powder or wire) at the focus point of a laser source. In this post, we address the residual stresses occurring during the build of metal components with DLD technology [1].
Laser Metal Deposition (LMD) technology (= Direct Metal Deposition DMD) is applied to build near net-shape 3D components [1] with applications covering a broad range of industries. LMD also has some unique capabilities that are absent in the powder bed selective melting and sintering processes. We quickly review here its unique features.
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