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《材料导报》期刊社  2017, Vol. 31 Issue (14): 138-142    https://doi.org/10.11896/j.issn.1005-023X.2017.014.029
  计算模拟 |
冷喷涂中颗粒形状和温度对其沉积过程的影响*
王锋1,2
1 重庆大学动力工程学院, 重庆 400030;
2 重庆大学低品位能源利用技术及系统教育部重点实验室, 重庆 400030;
Effects of Particle Shape and Temperature on Its Deposition Character in Cold Spray
WANG Feng 1,2
1 College of Power Engineering, Chongqing University, Chongqing 400030;
2 Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, Chongqing University, Chongqing 400030;
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摘要 为提高镁合金的抗腐蚀性能,以冷喷涂方法在其表面喷涂铝颗粒并采用有限元ALE网格方法对该过程进行了数值计算。考察了颗粒和基板的变形特性、温度分布;研究了颗粒形状、颗粒和基板初始温度对其沉积过程、颗粒反弹特性等的影响。结果表明,颗粒形状对系统局部变形影响较大;颗粒形状及速度对其反弹能、基板表面坑深、最大接触面积等也有较大影响。对系统预热有利于颗粒和基板的结合。当椭球形颗粒沿着其长轴碰撞以及球形颗粒碰撞时,温度和塑性变形都对称分布。结果可初步用于冷喷涂实验参数的选择和优化。
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王锋
关键词:  冷喷涂  镁合金  铝颗粒  塑性变形  颗粒形状    
Abstract: In order to improve magnesium alloy anti-corrosion performance, cold spray technology was adopted as surface modification method and particles deposition process has been simulated. In this work, finite element analysis (FEA) with Arbitrary Lagrange Eulerian (ALE) grid method was used to simulate Al particles deposition behavior on Mg alloy substrate in cold spray. The deformation process and temperature distribution in particle and substrate were investigated. Effects of particle shape, different particle and substrate initial temperature on particle deposition and rebound performance were also considered. Results show that the effect of particle shape on its local deformation and substrate deformation in impact process is significant. It is found that the effects of particle initial shape and velocity on particle rebound kinetic energy rate, substrate crater depth, maximum relative contact area between particle and substrate are obvious. Preheating of particle-substrate system is beneficial to their combination. The distributions of temperature and plastic deformation are symmetric when ellipsoid particle impacts on substrate vertically along its long axis and sphere particle impacts on substrate vertically. Results can be used as a reference for cold spray experiment parameters selection and optimization.
Key words:  cold spray    magnesium alloy    aluminium particles    plastic deformation    particle shape
               出版日期:  2017-07-25      发布日期:  2018-05-04
ZTFLH:  TG178  
基金资助: *国家自然科学基金(51006050; 50906104)
作者简介:  王锋:男,1977年生,博士,副教授,主要从事核能与新能源化工及材料中的热物理问题研究 E-mail:wangfeng@cqu.edu.cn
引用本文:    
王锋. 冷喷涂中颗粒形状和温度对其沉积过程的影响*[J]. 《材料导报》期刊社, 2017, 31(14): 138-142.
WANG Feng. Effects of Particle Shape and Temperature on Its Deposition Character in Cold Spray. Materials Reports, 2017, 31(14): 138-142.
链接本文:  
http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.014.029  或          http://www.mater-rep.com/CN/Y2017/V31/I14/138
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