Microstructural assessment and mechanical properties of electron beam welding of AlSi10Mg specimens fabricated by selective laser melting

Moshe Nahmany, Yoav Hadad, Eli Aghion, Adin Stern, Nachum Frage

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Electron beam bead on plate and butt-welded specimens (˜5 mm in thickness) built in the X and Z directions were investigated. The microstructure of welds in both bead on plate and electron-beam-welded specimens revealed a eutectic morphology with a very thin heat-affected zone. Increasing heat input resulted in reduced porosity of the joint and subsequent improvement of the mechanical properties. The yield strength and tensile strength of the joint region are similar to those of the base metal, i.e., 206 vs. 207.5 MPa and 310 vs. 322 MPa, respectively. The elongation of the welded metals was slightly reduced, as compared to that of the base metal. Fractography analysis revealed that for samples welded under optimal welding parameters, failure mostly occurred at the base metal. The results of a simulation of temperature distribution within the joint region were in a good agreement with observed macrostructural characteristics. Electron beam welding can be successfully used for joining AlSi10Mg parts fabricated by selective laser melting.

Original languageEnglish
Pages (from-to)228-240
Number of pages13
JournalJournal of Materials Processing Technology
Volume270
DOIs
StatePublished - 1 Aug 2019

Keywords

  • Additive manufacturing
  • AlSi10Mg
  • Electron beam welding
  • Mechanical properties
  • Microstructure
  • Selective laser melting

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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