Effects of laser modes on Nb segregation and Laves phase formation during laser additive manufacturing of nickel-based superalloy
Autor: | Shengyang Li, W.J. Xiao, Han-Ning Xiao, Lijun Song, Yongsheng Li, Limei Cha, Jyoti Mazumder |
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Rok vydání: | 2017 |
Předmět: |
010302 applied physics
Equiaxed crystals Materials science Mechanical Engineering Metallurgy Laser additive manufacturing chemistry.chemical_element 02 engineering and technology Nickel based Laves phase 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 01 natural sciences law.invention Superalloy Nickel chemistry Mechanics of Materials law 0103 physical sciences General Materials Science 0210 nano-technology Deposition (law) |
Zdroj: | Materials Letters. 188:260-262 |
ISSN: | 0167-577X |
DOI: | 10.1016/j.matlet.2016.10.118 |
Popis: | Nb-bearing nickel-based superalloys were fabricated by laser additive manufacturing using both continuous-wave (CW) and quasi-continuous-wave (QCW) laser modes. Effects of laser modes on Nb segregation and Laves phase morphology were investigated. The responses to aging treatments of two different fabricated samples were also investigated. CW mode tends to develop columnar dendrites, relative severe Nb segregation and continuous distributed Laves phase, while QCW mode tends to produce fine equiaxed dendrites, less Nb segregations and fine discrete Laves phase. In addition, the QCW sample responses better to aging treatment than the CW sample. |
Databáze: | OpenAIRE |
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