Influence of heat treatment and thermochemical surface engineering on the hierarchical microstructures of 3d printed austenitic stainless steel

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Abstract

This research focuses on characterisation of the hierarchical microstructure of AMmanufactured austenitic stainless steel and the effect of post-processing. The austenitisation treatment is found to dissolve the cellular structure and to reduce hardness, particularly in the layer closest to the support structure. The effect of substrate on low temperature surface hardening (LSTH) is investigated. It is found that the prior annealing and homogenisation of the austenitised specimen change both the depth of expanded austenite formation and the hardness profile.
Original languageEnglish
Title of host publicationProceedings of the 10th European Stainless Steel Conference – Science and Market and 6th European Duplex Stainless Steel Conference & Exhibition (ESSC & DUPLEX 2019)
PublisherAustrian Society for Metallurgy and Materials
Publication date2019
Pages22-31
ISBN (Print)978-1-7138-0301-0
Publication statusPublished - 2019
EventESSC & DUPLEX 2019 - Vienna, Austria
Duration: 30 Sep 20192 Oct 2019

Conference

ConferenceESSC & DUPLEX 2019
CountryAustria
CityVienna
Period30/09/201902/10/2019

Keywords

  • Additive manufacturing
  • Austenitic stainless steel
  • Austenitisation
  • Low temperature surface hardening
  • Microstructure stability

Cite this

Funch, C. V., Mishin, O. V., Christiansen, T. L., & Somers, M. A. J. (2019). Influence of heat treatment and thermochemical surface engineering on the hierarchical microstructures of 3d printed austenitic stainless steel. In Proceedings of the 10th European Stainless Steel Conference – Science and Market and 6th European Duplex Stainless Steel Conference & Exhibition (ESSC & DUPLEX 2019) (pp. 22-31). Austrian Society for Metallurgy and Materials.