CMT additive manufacturing of a high strength steel alloy for application in crane construction

Josef Plangger, Peter Schabhüttl, Tomaž Vuherer, Norbert Enzinger

Research output: Contribution to journalArticle

Abstract

This work investigates the feasibility of manufacturing a near net shape structural part directly on a subassembly for application in crane construction without post-machining. Singleand multi-pass welding experiments, using the Cold Metal Transfer process (CMT), were executed to identify and verify suitable process parameters. The obtained parameters were then used to manufacture a wall structure and an optical measurement of the resulting geometry was performed. Mechanical properties of the all-weld metal in the as-built condition in different directions were determined. The results for tensile testing showed similar values to the filler material specifications and fracture toughness matched literature values, but a decrease of impact toughness was obtained. Although mechanical testing showed no significant anisotropy, hardness measurements showed the influence of the local temperature profile. Finally, strategies to manufacture a complex structural part were investigated. It was possible to establish a stable process to manufacture a section of the specified geometry in a first attempt. However, results indicate that there is still further work necessary to optimize this process and to investigate the influences on the mechanical properties of the final component.

Original languageEnglish
Article number650
Number of pages14
JournalMetals
Volume9
Issue number6
DOIs
Publication statusPublished - 1 Jun 2019

Keywords

  • Additive manufacturing
  • Arc-based additive manufacturing
  • CMT
  • High strength steel
  • Mechanical properties
  • Near net shape
  • Welding strategies
  • Wire arc additive manufacturing

ASJC Scopus subject areas

  • Materials Science(all)

Fields of Expertise

  • Mobility & Production

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