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Numerical modelling of particle impact and residual stresses in cold sprayed coatings: A review
Surface & Coatings Technology ( IF 5.4 ) Pub Date : 2021-01-12 , DOI: 10.1016/j.surfcoat.2021.126835
Ahmed Fardan , Christopher C. Berndt , Rehan Ahmed

Cold spray technology provides protective coatings, additive manufacturing and repair to a wide array of industrial sectors. Alternative tags for cold spray include, kinetic metallisation, kinetic fusion, hypersonic spray, gas dynamic cold spray, cold spray printing, and cold spray additive manufacturing. These processes employ the same physics principles of accelerating micrometre-sized particles to supersonic velocities that impact and adhere onto a suitably prepared substrate. Numerical modelling has been used extensively to study particle impact modelling. The prediction of critical velocity, deformation mechanism and, more recently, residual stresses have been areas of interest that have been evaluated by numerical methods such as Lagrangian, Eulerian, Smoothed Particle Hydrodynamics, Coupled Eulerian-Lagrangian, and Molecular Dynamics. The crucial findings of these models are summarised, and their comparative outcomes assessed with a critical analysis of their merits and weaknesses. The process parameters applied in the simulations such as particle diameter, impact velocity, pre-heat temperature and material chemistry is compiled. The experimental techniques used for residual stress measurements; such as X-ray diffraction, neutron diffraction, material removal, curvature measurement and deformation techniques, are concisely reviewed from the context of being applied to cold spray deposits.



中文翻译:

冷喷涂涂层中颗粒冲击和残余应力的数值模型:综述

冷喷涂技术可为多种工业领域提供防护涂料,增材制造和维修。冷喷涂的替代标签包括:动力学金属化,动力学融合,高超声速喷涂,气体动态冷喷涂,冷喷涂印刷和冷喷涂添加剂制造。这些过程采用了相同的物理原理,即将微米级的粒子加速到超音速,从而撞击并粘附在适当制备的基板上。数值建模已广泛用于研究粒子碰撞建模。临界速度,变形机制以及最近的残余应力的预测已成为人们关注的领域,这些领域已通过数值方法进行了评估,例如拉格朗日,欧拉,光滑粒子流体动力学,欧拉-拉格朗日耦合和分子动力学。总结了这些模型的关键发现,并通过对它们优缺点的严格分析来评估它们的比较结果。汇总了模拟中应用的工艺参数,例如粒径,冲击速度,预热温度和材料化学成分。用于残余应力测量的实验技术;从X射线衍射,中子衍射,材料去除,曲率测量和变形技术等方面的简要介绍,已被应用于冷喷涂沉积物。用于残余应力测量的实验技术;从X射线衍射,中子衍射,材料去除,曲率测量和变形技术等方面的简要介绍,已被应用于冷喷涂沉积物。用于残余应力测量的实验技术;从X射线衍射,中子衍射,材料去除,曲率测量和变形技术等方面的简要介绍,已被应用于冷喷涂沉积物。

更新日期:2021-01-24
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