This study examines the variation of TixCy/Ni composite properties during the polishing process using molecular dynamics simulation. Various material parameters and testing conditions, including abrasion depth, abrasion velocity, reinforcement particle derivatives, and reinforcement particle size, are examined, revealing both advantageous and disadvantageous impacts on feedstock characteristics such as supply force, friction coefficient, dislocation distribution, von Mises stress, and displacement vector. The findings indicate that increasing the velocity of the abrasive ball reduces the friction coefficient up to a certain threshold, beyond which it no longer improves and instead increases the density of dislocation distribution within the structure. Strong covalent bonding of TiC aids in reducing the friction coefficient and absorbing the force transmitted from the Ni matrix. Changes in the TiC reinforcement particle radius had minimal impact on polishing and normal force, as larger particles exhibited elastic deformation. However, TiC particles with 12 Å and 15 Å radii formed locked dislocations, significantly hardening the TiC/Ni matrix. This research offers key insights for optimizing TiC/Ni friction characteristics of composites and machining parameters for high-value product fabrication.

中文翻译：

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TixCy /Ni 复合材料的微观结构、界面和摩擦性能


本研究使用分子动力学模拟研究了抛光过程中 TixCy/Ni 复合材料性能的变化。检查了各种材料参数和测试条件，包括磨损深度、磨损速度、增强颗粒衍生物和增强颗粒尺寸，揭示了对原料特性的有利和不利影响，例如供应力、摩擦系数、位错分布、von Mises 应力和位移矢量。研究结果表明，增加磨球的速度会将摩擦系数降低到某个阈值，超过该阈值后，摩擦系数不再改善，反而会增加结构内位错分布的密度。TiC 的强共价键有助于降低摩擦系数并吸收从 Ni 基体传递的力。TiC 增强颗粒半径的变化对抛光和法向力的影响最小，因为较大的颗粒表现出弹性变形。然而，半径为 12 Å 和 15 Å 的 TiC 颗粒会形成锁定位错，使 TiC/Ni 基体显著硬化。这项研究为优化复合材料的 TiC/Ni 摩擦特性和高价值产品制造的加工参数提供了关键见解。