Factor which governs the feature of texture developed during additive manufacturing; clarified from the study on hexagonal C40-NbSi2. (October 2021)

• Record Type: Journal Article
• Authors: Hagihara, Koji; Ishimoto, Takuya; Suzuki, Masahiro; Ozasa, Ryosuke; Matsugaki, Aira; Wang, Pan; Nakano, Takayoshi
• Is Part Of: Scripta materialia. Number 203(2021)
• Publication Date: 2021-10
• Subjects: Transition metal alloys and compounds -- Laser processing -- Selective laser melting (SLM) -- Texture -- Electron backscattering diffraction (EBSD); Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.114111
• Languages: English
• ISSNs: 1359-6462

Abstract

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. Graphical abstract: Image, graphical abstract