| 陈聪,苏浩,刘岩.冷喷涂中氧化物影响的物质点法模拟[J].计算力学学报,2024,41(5):857~863 |
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| 冷喷涂中氧化物影响的物质点法模拟 |
| Effect of surface oxide in cold spray with the material point simulations |
| 投稿时间：2024-07-22 修订日期：2024-08-14 |
| DOI：10.7511/jslx20240722005 |
| 中文关键词: 冷喷涂 氧化物 物质点法 增材制造 |
| 英文关键词:cold spray oxide material point method additive manufacturing |
| 基金项目:国家自然科学基金(12072172;11772171)资助项目. |
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| 中文摘要: |
| 冷喷涂利用冲击载荷下材料的塑性变形实现金属间的固态结合,在表面修复、特殊材料制备和增材制造等工程应用方面具有重要意义。原材料表面的氧化物是影响冷喷涂中材料结合效率和粘接强度的重要因素之一。本文采用物质点法研究了颗粒及基底表面氧化物对粘接过程的影响。通过分析界面处氧化物的残留情况,借助定义的颗粒内极端塑性变形区的体积比,给出了不同冲击速度下颗粒和基底氧化物对接触面积和塑性变形程度的影响规律。当氧化物存在时,提高颗粒的冲击速度能够同时增加新鲜的金属表面和塑性变形。 |
| 英文摘要: |
| Cold spray is a technique utilizing the plastic deformation of materials under impact to achieve solid-state bonding between metals.It has great importance for engineering applications such as surface repair,preparation of special materials,and additive manufacturing.The oxide on the raw materials is one of the major factors influencing the bonding efficiency and adhesive strength in cold spray.The effects of the oxide on the bonding between the particle and substrate are investigated with the simulation of material point method.The volume ratio of extreme plastic deformation zone in the particle is defined.Based on the residue of oxides at the interface and the aforementioned definition,the conclusions of the effect on the contact area and the plastic deformation under various impact velocities are drawn.Under the existence of oxides,increasing the impact velocity of the particle can simultaneously enlarge the fresh metallic surface and increase the plastic deformation. |
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