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Influence Of HIP Post-Treatment On The Fatigue Strength Of 316L-Steel Produced By Selective Laser Melting (SLM)

  • : Johannes Kunz1, Anke Kaletsch1, Christoph Broeckmann1
  • : 1Institut für Werkstoffanwendungen im Maschinenbau, RWTH Aachen
  • : PDF Download
  • : 2016

Abstract

Selective Laser Melting (SLM) is an additive manufacturing process that enables the production of complex structures without material removal. For industrial use, the mechanical properties of SLM parts have to be comparable to conventionally produced parts. In this study, standard austenitic steel powder (316L) is used for the production of SLM samples. The tensile and fatigue strength are tested and compared to properties of conventionally produced materials. Furthermore, the influence of Hot Isostatic Pressing (HIP) as post treatment on the fatigue properties of SLM produced parts is investigated. Optical microscopy is used to analyze the change of microstructure and the fatigue fracture initiation points are identified by Scanning Electron Microscopy (SEM).

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