Detail publikace

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

MALÝ, M. KOUTNÝ, D. MICHÁLEK, M.

Originální název

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

Typ

článek ve sborníku mimo WoS a Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

MALÝ, M.; KOUTNÝ, D.; MICHÁLEK, M.

Vydáno

19. 10. 2023

Nakladatel

Metal Additive Manufacturing Conference 2023

Místo

WKO, Vienna

Strany od

129

Strany do

139

Strany počet

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/"
}