Analytical investigation into the powder distribution and laser beam-powder flow interaction in laser direct energy deposition with a continuous coaxial nozzle

被引：8
作者：
Liu, Qipeng [1 ]
Li, Wen [1 ]
Yang, Kun [2 ]
Gao, Yuehua [1 ]
Wang, Lei [1 ]
Chu, Xihua [3 ]
机构：
[1] Nanchang Hangkong Univ, Natl Def Key Disciplines Lab Light Alloy Proc Sci, Nanchang 330063, Peoples R China
[2] Dalian Jiaotong Univ, Coll Locomot & Rolling Stock Engn, Dalian 116028, Peoples R China
[3] Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China
来源：
ADVANCED POWDER TECHNOLOGY | 2023年 / 34卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Continuous coaxial nozzle; Divergence angles of the powder jet; Powder distribution; Laser beam-powder flow interaction; Analytical modeling; NUMERICAL-SIMULATION; ANALYTICAL-MODEL; ATTENUATION; STREAMS; POWER; JET;
D O I：
10.1016/j.apt.2023.104058
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The powder distribution and interaction between the laser beam and powder flow affect the deposition quality during the process of laser direct energy deposition with a continuous coaxial nozzle. In this paper, some key analytical formulae related to the laser beam-powder flow interaction are comprehensively deduced and validated. The powder distribution formulae for different regions are first established considering the divergence angles of powder jet. The energy attenuation formulae of laser beam passing through the powder flow are derived considering the change of powder distribution from annular to circular Gaussian modes. The temperature formulae of powder particles passing through the laser beam are derived based on a proposed temperature formula with the solid-liquid phase transition, and the powder temperature is also further analyzed. These formulae are validated by published deposition examples and used to analyze the laser beam-powder flow interaction. (c) 2023 The Society of Powder Technology Japan. Published by Elsevier BV and The Society of Powder Technology Japan. All rights reserved.
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页数：14
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