Publication detail

Processing of metallic materials by Laser Powder Bed Fusion at elevated temperatures

MALÝ, M. KOUTNÝ, D. MICHÁLEK, M.

Original Title

Processing of metallic materials by Laser Powder Bed Fusion at elevated temperatures

Type

article in a collection out of WoS and Scopus

Language

English

Original Abstract

Laser Powder Bed Fusion (L-PBF) is a 3D printing technology that has gained worldwide acceptance due to its high resolution and accuracy. However, high equipment and material costs, residual stresses in the manufactured parts and internal defects are still major barriers to widespread industrial use. Preheating is a process in which the powder bed is heated during the production run. This leads to a homogenisation of the temperature field, which usually results in lower residual stresses. It also affects the interaction between the laser beam and the powder as well as the solidification process. The effects of high temperature preheating on residual stresses have been studied on Ti6Al4V and Inconel 939. This study evaluates the suitability of preheating to reduce the number of support structures, thereby reducing production costs and environmental impact. The results showed that preheating at high temperatures led to a rapid reduction of residual stresses in Ti6Al4V, but also to a rapid powder degradation. In contrast, preheating led to increased residual stresses in Inconel 939 due to microstructural changes. Therefore, preheating was evaluated as an uneconomical method for removing support structures in Ti6Al4V and Inconel 939.

Keywords

Laser Powder Bed Fusion, Selective Laser Melting, Preheating, Ti6Al4V, Inconel 939, Residual stress, Support structures, Finite element method

Authors

MALÝ, M.; KOUTNÝ, D.; MICHÁLEK, M.

Released

19. 10. 2023

Publisher

Metal Additive Manufacturing Conference 2023

Location

WKO, Vienna

Pages from

129

Pages to

139

Pages count

11

URL

https://www.mamc.at/

BibTex

@inproceedings{BUT184963,
  author="Martin {Malý} and Daniel {Koutný} and Mojmír Cyril {Michálek}",
  title="Processing of metallic materials by Laser Powder Bed Fusion at elevated temperatures",
  booktitle="Metal Additive Manufacturing Conference 2023",
  year="2023",
  series="October 17 - 19, 2023",
  pages="11",
  publisher="Metal Additive Manufacturing Conference 2023",
  address="WKO, Vienna",
  url="https://www.mamc.at/"
}