Page 144 - PCMI Journal July 2018
P. 144
Keith Murray | Business Development Manager, Product Area Powder |
5/29/18
Sandvik Materials Technology | SE | The Take-Aways from Additive Manufacturing: A Powder Metallurgical Perspective
PROCESS CAPABILITIES
POWDER BED FUSION V DIRECT ENERGY DEPOSITION
Characteristic
Powder Bed Fusion Direct Energy Deposition
Materials
Limited Extensive
Part Dimensions Dependent on Handling Limited by Process Chamber System (typically 250 x 250 x 250mm)
Part Complexity
Limited Nearly Unlimited
Dimensional Accuracy ≥0.1mm ≥0.1mm
Deposition Rate
3-10 mm3/s 1-3 mm3/s
Build up on 3D Surfaces Flat Surface On Existing Parts Flat Preform
Surface Roughness
60-100μm 30-50μm
Layer Thickness ≥0.03-1mm ≥0.03-1mm
22
Source: European Additive Manufacturing Group (EuroAM)
DESIGN CONSIDERATIONS
POWDER BED FUSION - LASER
• Minimum Wall Thickness
• Minimum Hole Diameter
• Maximum Arch Radius
• Maximum Channel Diameter / Length
• Minimum Strut Diameter (lattice structures) • Part Orientation
23
Source: European Additive Manufacturing Group (EuroAM)
Platform of various standard geometrical elements for evaluating machine capability and parameters
Issue 131
July 2018 PCMI Journal 143
11
