Numerical simulation of the effects of the impact velocity on the particle deposition characteristics in cold gas dynamic spraying

作     者：MENG Xianming ZHANG Junbao HAN Wei LIANG Yongli YANG Xiaoping ZHAO Jie 

作者机构：School of Materials Science and Engineering Faculty of Mechanical Engineering Materials and Energy Dalian University of Technology Dalian 116024 China Advanced Technology Division Research InstituteBaoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China 

出 版 物：《Baosteel Technical Research》 (宝钢技术研究（英文版）)

年 卷 期：2011年第5卷第1期

页      面：12-16页

学科分类：080503[工学-材料加工工程] 081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：numerical simulation cold gas dynamic spraying(CGDS) deformation particle impact velocity 

摘      要：In this study, the effects of the impact velocity on the particle deposition characteristics in cold gas dynamic spraying （CGDS） of 304 stainless steel （SS） on an interstitial free （IF） steel substrate are numerical simulated by means of a finite element analysis （FEA）. The results have illustrated that when the particle impact velocity exceeds a critical value at which adiabatic shear instability of the particle starts to occur. Meanwhile, the fatten ratio and impact crater depth （or the effective contacting area ） increase rapidly. The particle-substrate bonding and deposition mechanism can be attributed to such an adiabatic shear deformation induced by both the compressive force and the slide friction force of particle. The critical velocity can be predicted by numerical simulation, which is useful to optimize the CGDS processing parameters for various materials.