Critical Thinking

Selective the SLM process, a component is formed

Selective Laser Melting, a powder-based additive
manufacturing, is capable of producing parts layer after layer from a 3D CAD
model. Now, this method attracts growing attention in biomedical applications
for applying this technology to make implants and prostheses with complicated ultimate
shape. SLM is well-known to have a high-potential in making of fabrication
technologies for producing complex sections, and as an outcome, many scientific
works are dedicated to its study during the SLM process, a component is formed upon
each layer by surfacing of metallic powder using a laser or a high-energy
electron beam.  Titanium alloys (Ti6A14V),
nickel alloys, stainless steel and some aluminum alloys are the materials used
in this procedure. In spite of the fact that many positive aspects of the SLM
method has already been known over the conventional fabrication routes, there
are still many facets of the technology that can be discovered; such as laser
parameters, surface circumstances, thickness of the grown layers, the
combination of divergent fabrication technologies, and the repeatability and
reproducibility of the growth process.

EBM (Electron Beam Melting) is a known powder-bed fusion
method which is used more nowadays for Additive Manufacturing (AM) of metal
components. In which, by guiding it with CAD (Computer-aided Design)
information, an electron beam is scanned on a powder bed. The thin layers, WHICH
HAVE BEEN SELECTED AND SOLIDIFIED are stacked up and the components are
completed. The EBM method has a pro when it comes to required components
possess complex outer configuration and inner structures or it is built from
titanium alloys, which is famous for being a processing-resistant metal. Because
of this superiority, biomedical engineering is an attractive field to conduct
studies for discovering specific applications. As such, when EBM method is used
alongside CT (Computer Tomography) technology, artificial implants could be
created with complex figures for optimized human bodies from Ti-6 A1-4V alloy, which
would deduct the physical harm to the human body. The circumstances of the
procedure would have its effects the primary properties of Ti-6A1-4V alloy
produced by the EBM method (hereafter EBM material).
To create appropriate products, therefore, it is noteworthy to aggregate
elementary familiarity on their influences.

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Electron Beam Melting (EBM), which is known to be an additive
manufacturing process, presents great potential for making medical devices and
aerospace components through outstanding configuration control via computer
aided design input.

Electron Beam Melting (EBM) and Selective Laser Melting
(SLM) are the known used AM technologies for the metals, and both are capable
of producing complex metallic components at high accuracies. In a comparison to
SLM, the higher power and higher scanning velocity of electron beam enable EBM
to preheat the powder bed sufficiently to prevent the interior stress or cracks
during the rapid cooling of parts and to generate materials with high shaping
rate and superior properties. Furthermore, EBM can prevent defects by
optimizing the process parameters, and can control the microstructure in a
broad range than SLM procedures.  

 

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