Fabrication of FeNi intermetallic using the wire-arc additive manufacturing process: A feasibility and neutron diffraction phase characterization study

Chen Shen, Klaus Dieter Liss, Mark Reid, Zengxi Pan, Xueming Hua*, Fang Li, Gang Mou, Ye Huang, Yanyan Zhu, Huijun Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

FeNi intermetallic has been continuously attractive due to the appreciable magneto-crystalline anisotropy and high saturation magnetization in the nominally-equiatomic chemically ordered L10 structure. In the present research, the bulk FeNi alloy is successfully fabricated using an innovative wire-arca additive manufacturing process, which is also an in-situ alloying method. In the meantime, to characterize the thermal lattice evolution of the FeNi, neutron diffraction is conducted to the as-fabricated sample in-situ during a heat treatment process. According to the neutron results, an anisotropic fcc-FeNi lattice evolution has been detected, which indicates the existence of FeNi superstructure in the WAAM fabricated FeNi bulk material. In addition, due to the featured advantage of the neutron data, the fcc-FeNi volumetric lattice thermal expansion coefficients during heating and cooling processes are calculated.

Original languageEnglish
Pages (from-to)691-699
Number of pages9
JournalJournal of Manufacturing Processes
Volume57
DOIs
StatePublished - Sep 2020
Externally publishedYes

Keywords

  • Additive manufacturing
  • Intermetallic
  • Neutron diffraction

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