激光熔化沉积TiC/TC4复合材料热-流行为及陶瓷颗粒分布状态
TG456.7; 颗粒增强钛基复合材料在航空航天等领域具有广阔的应用前景,采用仿真与试验相结合的方法,对激光熔化沉积TiC/TC4复合材料过程中的热-流行为和沉积层中陶瓷颗粒的分布状态进行了研究.结果表明,工艺参数对熔池的热-流行为及沉积层形貌具有显著的影响,熔池表面的流体流动呈波纹状,熔融金属从熔池中心向四周流动;熔池底部等温面上熔融金属从四周流向熔池底部,并出现漩涡现象.在激光熔化沉积过程中,TiC颗粒穿透熔池表面的Marangoni对流区,在熔池中与流体交互作用,最终在沉积层中出现沉积层中上方部位团聚、沉积层中下方部位团聚、沉积层中均匀分布等分布状态....
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| Published in | 焊接学报 Vol. 45; no. 5; pp. 74 - 83 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
南京航空航天大学,材料科学与技术学院,南京,211106%南京航空航天大学,材料科学与技术学院,南京,211106
01.05.2024
南京航空航天大学深圳研究院,深圳,518000 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-360X |
| DOI | 10.12073/j.hjxb.20230605001 |
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| Abstract | TG456.7; 颗粒增强钛基复合材料在航空航天等领域具有广阔的应用前景,采用仿真与试验相结合的方法,对激光熔化沉积TiC/TC4复合材料过程中的热-流行为和沉积层中陶瓷颗粒的分布状态进行了研究.结果表明,工艺参数对熔池的热-流行为及沉积层形貌具有显著的影响,熔池表面的流体流动呈波纹状,熔融金属从熔池中心向四周流动;熔池底部等温面上熔融金属从四周流向熔池底部,并出现漩涡现象.在激光熔化沉积过程中,TiC颗粒穿透熔池表面的Marangoni对流区,在熔池中与流体交互作用,最终在沉积层中出现沉积层中上方部位团聚、沉积层中下方部位团聚、沉积层中均匀分布等分布状态. |
|---|---|
| AbstractList | TG456.7; 颗粒增强钛基复合材料在航空航天等领域具有广阔的应用前景,采用仿真与试验相结合的方法,对激光熔化沉积TiC/TC4复合材料过程中的热-流行为和沉积层中陶瓷颗粒的分布状态进行了研究.结果表明,工艺参数对熔池的热-流行为及沉积层形貌具有显著的影响,熔池表面的流体流动呈波纹状,熔融金属从熔池中心向四周流动;熔池底部等温面上熔融金属从四周流向熔池底部,并出现漩涡现象.在激光熔化沉积过程中,TiC颗粒穿透熔池表面的Marangoni对流区,在熔池中与流体交互作用,最终在沉积层中出现沉积层中上方部位团聚、沉积层中下方部位团聚、沉积层中均匀分布等分布状态. |
| Abstract_FL | 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. |
| Author | 杨兴运 王磊磊 蔡绪康 占小红 |
| AuthorAffiliation | 南京航空航天大学,材料科学与技术学院,南京,211106%南京航空航天大学,材料科学与技术学院,南京,211106;南京航空航天大学深圳研究院,深圳,518000 |
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| Author_FL | WANG Leilei CAI Xukang ZHAN Xiaohong YANG Xingyun |
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| Keywords | TC4 titanium alloy 颗粒分布 thermal-fluid behavior laser melting deposition 复合材料 TC4钛合金 particle distribution 激光熔化沉积 热-流行为 composite materials |
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| Title | 激光熔化沉积TiC/TC4复合材料热-流行为及陶瓷颗粒分布状态 |
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