Detail publikace

Influence of Scanning Strategies on Processing of Aluminum Alloy EN AW 2618 Using Selective Laser Melting

KOUTNÝ, D. PALOUŠEK, D. PANTĚLEJEV, L. TĚŠICKÝ, L. KAISER, J.

Originální název

Influence of Scanning Strategies on Processing of Aluminum Alloy EN AW 2618 Using Selective Laser Melting

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This paper deals with various selective laser melting (SLM) processing strategies for aluminum 2618 powder in order to get material densities and properties close to conventionally-produced, high-strength 2618 alloy. To evaluate the influence of laser scanning strategies on the resulting porosity and mechanical properties a row of experiments was done. Three types of samples were used: single-track welds, bulk samples and samples for tensile testing. Single-track welds were used to find the appropriate processing parameters for achieving continuous and well-shaped welds. The bulk samples were built with different scanning strategies with the aim of reaching a low relative porosity of the material. The combination of the chessboard strategy with a 2 × 2 mm field size fabricated with an out-in spiral order was found to eliminate a major lack of fusion defects. However, small cracks in the material structure were found over the complete range of tested parameters. The decisive criteria was the elimination of small cracks that drastically reduced mechanical properties. Reduction of the thermal gradient using support structures or fabrication under elevated temperatures shows a promising approach to eliminating the cracks. Mechanical properties of samples produced by SLM were compared with the properties of extruded material. The results showed that the SLM-processed 2618 alloy could only reach one half of the yield strength and tensile strength of extruded material. This is mainly due to the occurrence of small cracks in the structure of the built material.

Klíčová slova

selective laser melting; aluminum alloy; EN AW 2618; scanning strategy; relative density; mechanical properties

Autoři

KOUTNÝ, D.; PALOUŠEK, D.; PANTĚLEJEV, L.; TĚŠICKÝ, L.; KAISER, J.

Vydáno

14. 2. 2018

Nakladatel

MDPI

Místo

Švýcarsko

ISSN

1996-1944

Periodikum

Materials

Ročník

11

Číslo

2

Stát

Švýcarská konfederace

Strany od

1

Strany do

18

Strany počet

18

URL

http://www.mdpi.com/1996-1944/11/2/298

Plný text v Digitální knihovně

http://hdl.handle.net/11012/70890

BibTex

@article{BUT145870,
  author="Daniel {Koutný} and David {Paloušek} and Libor {Pantělejev} and Lukáš {Těšický} and Jozef {Kaiser}",
  title="Influence of Scanning Strategies on Processing of Aluminum Alloy EN AW 2618 Using Selective Laser Melting",
  journal="Materials",
  year="2018",
  volume="11",
  number="2",
  pages="1--18",
  doi="10.3390/ma11020298",
  issn="1996-1944",
  url="http://www.mdpi.com/1996-1944/11/2/298"
}