SAMPE Journal - November/December 2021 - 51
Figure 5. Flow chart showing development steps. Results from initial inspection results feed back into design.
hours. Material property enhancements by postAM
processing heat treatments were not studied
in the project but have been studied elsewhere, see
[RD1].
The sample tests provided data on AM
manufactured materials properties performance;
E Modulus, Yield and Ultimate Strengths, and
their dependence on lattice structure details.
Optimization of lattice structures for part function
Repeatability and
achieved
manufacturing
quality was measured using data for; porosity,
roughness, defects and mechanical properties.
Effective cleaning to very high spacecraft
cleanliness requirements was measured.
This
aspect needs further effort to improve the process
in terms of associated manual efforts.
Mass measurements were used to confirm
CAD predicted mass, in some cases the mass was
higher than predicted, partly due to loose particles
sticking to the manufactured part. A general goal
to improve lattice quality was followed with tighter
control of the manufacturing process condition.
RESULTS
The specific requirements of the spacecraft
part were mainly; dimensional accuracy, static
strength, dynamic stiffness (minimum eigenmode
frequency) and vibration endurance in sine and
random vibration tests performed in 3 axes.
www. sampe.org
NOVEMBER/DECEMBER 2021
|
SAMPE JOURNAL |
51
Figure 6. SLM Solutions Group AG type SLM 280 Machine at NETME, Used
in the Project Work.
http://www.sampe.org
SAMPE Journal - November/December 2021
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