Thermal-fluid behavior and distribution of ceramic particles during laser melting deposition of TiC/TC4 composite materials

被引：0

作者：

Cai X. ^{[1
]}

Wang L. ^{[1
,2
]}

Yang X. ^{[1
]}

Zhan X. ^{[1
]}

机构：

[1] Nanjing University of Aeronautics and Astronautics, College of Materials Science and Technology, Nanjing

[2] Shenzhen Research Institute, Nanjing University of Aeronautics and Astronautics, Shenzhen

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2024年 / 45卷 / 05期

关键词：

composite materials; laser melting deposition; particle distribution; TC4 titanium alloy; thermal-fluid behavior;

D O I：

10.12073/j.hjxb.20230605001

中图分类号：

学科分类号：

摘要：

Particulate reinforced titanium matrix composites have broad application prospects in aerospace and other fields. The thermal-fluid behavior and the distribution of the ceramic particles in the deposited layer during the laser melting deposition of TiC/TC4 composites were studied by combining simulation and experiment. The results show that the process parameters have a significant effect on the thermal-fluid behavior of the molten pool and the morphology of the deposited layer. With the increase of laser power, the molten pool size and the maximum fluid flow rate increase. As the scanning speed increases, the molten pool size and the maximum fluid flow rate decrease. The fluid flow on the surface of the molten pool is corrugated. The molten metal flows from the center of the molten pool to the periphery. The molten metal on the isothermal surface of the bottom of the molten pool flows from the periphery to the bottom, and the vortex flow phenomenon occurs. In the process of laser melting deposition, TiC particles penetrate the Marangoni convection zone on the surface of the molten pool and interact with the fluid in the molten pool. Finally, they may appear in the distribution of the agglomeration in middle-upper part, the agglomeration in middle-lower part and uniform distribution in the deposited layer. © 2024 Harbin Research Institute of Welding. All rights reserved.

引用

页码：74 / 83

页数：9

共 29 条

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