Parameter optimization for electron beam melting of IN718 based on melt pool characterization

Xiao Ding, Yuichiro Koizumi, Akihiko Chiba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Single bead experiments were conducted to clarify the relationship between process parameters and melt pool geometry based on melt pool characterization, aiming to obtain a better understanding of Electron Beam Melting (EBM) additive manufacturing. INCONEL® 1 718 polycrystalline plate and gas atomization powders were used to generate melt pool geometries by various beam power and scan speed combinations. The surface morphology and cross section microstructures were analyzed. The surface morphology indicates that input energy play an important role in single beads continuity. The microstructure of fully columnar grains is verified by cross-section profile of single beads. Furthermore, the melt pool widths and depth increase almost linearly with beam power on the basis of the cross-sectional geometrical profiles. A reciprocal relationship exists between width/depth ratio and line energy. Finally, process condition has profound effect on crystal growth and grain structure. Grains grow along different direction in relatively high line energy cases. However, grains grow almost along the same direction namely grow vertically in relatively low line energy cases.

Original languageEnglish
Title of host publicationSUPERALLOYS 2016 - Proceedings of the 13th International Symposium on Superalloys
EditorsMark Hardy, Eric Huron, Uwe Glatzel, Brian Griffin, Beth Lewis, Cathie Rae, Venkat Seetharaman, Sammy Tin
PublisherMinerals, Metals and Materials Society
Pages367-373
Number of pages7
ISBN (Electronic)9781118996669
DOIs
Publication statusPublished - 2016
Event13th International Symposium on Superalloys, SUPERALLOYS 2016 - Seven Springs, United States
Duration: 2016 Sep 112016 Sep 15

Publication series

NameProceedings of the International Symposium on Superalloys
Volume2016-January

Other

Other13th International Symposium on Superalloys, SUPERALLOYS 2016
Country/TerritoryUnited States
CitySeven Springs
Period16/9/1116/9/15

Keywords

  • Electron beam melting
  • IN718
  • Melt pool
  • Process parameter

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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