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Effects Of Laser Irradiation Conditions On Mechanical Properties By Selective Laser Melting

  • : Yuji Kusaki1, Yuki Hirata1, Shinya Sasaki1
  • : 1Tokyo University of Science
  • : PDF Download
  • : 2017

Abstract

Recently, additive manufacturing (AM) is being increasingly used for fabricating industrial products as AM can directly produce complex 3D objects very rapidly. In selective laser melting (SLM) which is one of the AM methods, components are fabricated by layers of powder materials and sintering it selectively with fiber laser. It has been reported that objects manufactured by SLM show poor mechanical properties due to residual stress or voids and other defects. Residual stress is one of the main factors that leads to fracture and failure of SLM produced components. Therefore in some SLM machines (e.g., ProX300 3D Systems, US), the melting areas are partitioned into geometric shapes like hexagons. In order to strengthen the bonds between these geometric areas, the borders are sintered twice, forming overlaps. Thus the aim of this work is to investigate as to how the overlaps affect mechanical properties of SLM produced parts.

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