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

SCRIPTA MATERIALIA

卷:203

Article

Hagihara, Koji^1,2,4  Ishimoto, Takuya^1,2  Suzuki, Masahiro¹  Ozasa, Ryosuke^1,2  Matsugaki, Aira^1,2  Wang, Pan³  Nakano, Takayoshi^1,2 

[1] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[2] Osaka Univ Anisotrop Design & Res Ctr, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[3] ASTAR, Singapore Inst Mfg Technol, 73 Nanyang Dr, Singapore 637662, Singapore

[4] Nagoya Inst Technol, Dept Phys Sci & Engn, Nagoya, Aichi 4668555, Japan

关键词: Transition metal alloys and compounds;    Laser processing;    Selective laser melting (SLM);    Texture;    Electron backscattering diffraction (EBSD);   

DOI  :  10.1016/j.scriptamat.2021.114111

来源: Elsevier

【 摘 要 】

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 < 0 0 01 > 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 C11(b)-MoSi2 with a tetragonal unit cell and a beta-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. (C) 2021 The Author(s). Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

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