| Summary: | This research paper explores the possible optimization of metallic 3D printing powders
using Duplex Stainless Steel (DSS) as an example and the associated process parameters.
Unlike the traditional subtractive methods in which material is removed to form an object,
AM uses additive processes to layer material and result in improved product efficiency
and material management. Under consideration here is the manufacturing by means of the
Direct Energy Deposition technique (DED) and its impact on the DSS. It is the DSS that
is paramount to the marine industry applications.
The study investigated the impact of processing parameters such as hopper rotational
speed, laser power, and powder feed rate (PFR) on the quality and integrity of the
fabricated objects. By using an Optomec LENS model 150 L-DED system, the study
investigates the impact of these variables on microstructure and material properties with
an aim to achieve the balance between the production efficiency and the component
quality.
The experimental results show the relationship between the increase of laser power and
the improvement of the sample size and homogeneity with the reduction of the porosity.
Extensive examination utilizing light microscopy and X-ray diffraction (XRD), gives us
microstructural evolution, which reveals the main role of energy density in controlling the
final results of the 3D printed parts.
Moreover, the research deals with the incorporation of Composite A and Composite B into
the 420SS matrix to represent the duplex stainless-steel conversion, so as to increase
tensile strength and corrosion resistance. The results help to find out how process
parameters affect DSS, which will eventually lead to the implementation of 3D printing
technology in industries.
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