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| AuNiCu合金摩擦磨损的分子动力学模拟 |
| Molecular dynamics simulation of friction and wear of AuNiCu alloy |
| 投稿时间：2022-10-10 |
| DOI： |
| 中文关键词: 金属材料 分子动力学模拟 摩擦磨损 AuNiCu合金 |
| 英文关键词: metal materials molecular dynamic simulation friction and wear application |
| 基金项目:云南省重大科技专项(202002AB080001-1-6)；云南省重点研发计划(202203ZA080001)；云南省重大科技计划(202102AB080008-3)；云南院士专家工作站项目(YSZJGZZ-2021080) |
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| 中文摘要: |
| 通过分子动力学模拟的方法，研究了Au-7.5Ni-xCu合金的摩擦磨损性能。首先采用粗糙体-平面接触模型和Atomsk软件构造合金模型；再由lammps软件计算出合金的摩擦力、摩擦系数判断出合金的摩擦学特性；最后通过Ovito软件对摩擦磨损过程进行可视化分析，包括摩擦磨损过程中组织结构和位错的演变，磨损表面原子的堆积情况等。结果表明，合金摩擦系数随着Cu含量的增加而呈现上升趋势，磨损后基体表明呈“U”形堆积，当Cu含量为10%时，基体抗变形能力最强；磨损过程中观察到晶粒的分裂和合并现象，合金基体内部位错密度明显增加。 |
| 英文摘要: |
| The tribological properties of Au-7.5Ni-xCu alloy were studied by molecular dynamics simulation. Firstly, the rough body plane contact model and Atomsk software were used to construct the alloy model. Then the friction force and friction coefficient were calculated by lammps software and the tribological characteristics were judged. Finally, the friction and wear process were visually analyzed by Ovito software, including the evolution of microstructure and dislocation, and the accumulation of atoms on the worn surface. The results show that the friction coefficient of the alloy increases with the increase of Cu content and the matrix exhibits a "U" shape after wear. When the Cu content is 10%, the deformation resistance of the matrix is the strongest. During the wear process, the phenomenon of grain splitting and merging was observed and the dislocation density in the alloy matrix increased obviously. |
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