Direct fabrication of single-crystal-like structure using quasi-continuous-wave laser additive manufacturing
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第1期
论文作者：Hui Xiao Manping Cheng Lijun Song
文章页码：216 - 221
摘 要：The synchronously periodic re-melting of molten pool was firstly introduced in additive manufacturing to promote the epitaxial growth of columnar structure using a novel quasi-continuous-wave（QCW）laser.The epitaxial growth of columnar structure was intensified and the single-crystal-like sample with highly oriented "zigzag" columnar grains was produced.The modified molten-pool geometry and the synchronously high-frequency re-melting of the molten pool contribute to the formation of singlecrystal-like structure.This work reports a new route to promote the continuously epitaxial growth of dendrites for fabrication of single-crystal-like sample.
Hui Xiao1,2,3，Manping Cheng1,2，Lijun Song1,2
1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Bodies, Hunan University2. Hunan Provincial Key Laboratory of Intelligent Laser Manufacturing, Hunan University3. School of Mechatronics Engineering, Foshan University
摘 要：The synchronously periodic re-melting of molten pool was firstly introduced in additive manufacturing to promote the epitaxial growth of columnar structure using a novel quasi-continuous-wave（QCW）laser.The epitaxial growth of columnar structure was intensified and the single-crystal-like sample with highly oriented "zigzag" columnar grains was produced.The modified molten-pool geometry and the synchronously high-frequency re-melting of the molten pool contribute to the formation of singlecrystal-like structure.This work reports a new route to promote the continuously epitaxial growth of dendrites for fabrication of single-crystal-like sample.
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