Abstract:
Additive manufacturing (AM) is the standardized name to describe the new world of
manufacturing technology that built 3D objects by adding materials in layers, whether the
material is in plastic, ceramics, metal and or it is advancing towards human tissues.AM can
also be described as rapid manufacturing (RM). AM processes needs only few basic
dimensional details, understanding of AM machines and building material that could be
used to manufacture the part. Laser metal deposition (LMD) is form of AM, a method that
has a great possibility to reduce material waste through near net shape production as well
as adding value to an already manufactured costly component (aviation and aerospace
industry). Laser Metal deposition (LMD) process offers the potential to make a metallic
component directly from CAD file. The focus of this study is an investigation of powder
stream process, a sub process of LMD. Powder stream and processing parameters are
highly important in clad formation, it directly affect powder distribution, temperature
attenuation of beam and velocity during LMD. Various Modeling techniques have been
used to model this sub process such as: dimensional modeling, statistical modeling and a
review of analytical Modeling has been done. Effect of different processing parameters on
clad height, clad width and surface hardness has been studied. The results of these
investigations have also been validated with an experimental work.
