Factor which governs the feature of texture developed during additive manufacturing; clarified from the study on hexagonal C40-NbSi2

Koji Hagihara, Takuya Ishimoto, Masahiro Suzuki, Ryosuke Ozasa, Aira Matsugaki, Pan Wang, Takayoshi Nakano*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

C40-NbSi2 with a hexagonal unit cell is focused as a high-temperature structural material. We first attempted the fabrication of the bulk C40-NbSi2 products via selective laser melting (SLM) in additive manufacturing (AM) process. Strong crystallographic texture control wherein <0001> was parallel to the building direction, i.e. development of the so-called basal fiber texture, was achieved in this study. The texture developed in products does not largely vary by changing the scanning strategy, unlike the textures of C11b-MoSi2 with a tetragonal unit cell and a β-Ti alloy with a cubic unit cell. A comparison of these results led us to the conclusion that crystal symmetry, i.e., the multiplicity of the preferential crystal growth direction, is one of the primary factors that governs the features of the textures developed in AM-built materials.

Original languageEnglish
Article number114111
JournalScripta Materialia
Volume203
DOIs
StatePublished - 2021/10

Keywords

  • Electron backscattering diffraction (EBSD)
  • Laser processing
  • Selective laser melting (SLM)
  • Texture
  • Transition metal alloys and compounds

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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