Effect of process parameters on defects in large scale components manufactured by direct laser deposition

D.V. Masaylo, S. Igoshin*, A. Popovich, V. Popovich

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

3 Citations (Scopus)

Abstract

Direct laser deposition (DLD), implemented on the basis of a 5-axis robot manipulator, is a very flexible technique with many adjustable process parameters affecting the quality of the final product. Objects manufactured by the DLD method may contain defects significantly reducing mechanical and functional properties. This article provides an overview of possible DLD process-induced defects that were identified by increasing the density of the produced material. The following defects were identified and discussed in the current work: Lack of fusion, porosity, cracking, oxide inclusions, and metal influx. It is shown that by changing such process parameters as laser power, powder feed rate, head lift and hatch distance, it is possible to improve the quality of the cladding and substantially reduce the process-induced defects.

Original languageEnglish
Pages (from-to)665-671
JournalMaterials Today: Proceedings
Volume30
Issue number3
DOIs
Publication statusPublished - 2020
Event2019 International Scientific Conference on Materials Science: Composites, Alloys and Materials Chemistry, MS-CAMC 2019 - Saint Petersburg, Russian Federation
Duration: 20 Nov 201921 Nov 2019

Keywords

  • Additive manufacturing
  • Defects
  • Direct laser deposition
  • Heat resistant alloys
  • Technological parameters

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