MD模拟加载温度对Ni3Al基合金加工表面的影响
Effect of Loading Temperature on Processed Surface of Ni3Al-Based Alloy by MD Simulation
靳岚 1李开强 1伊廷华1
作者信息
- 1. 兰州理工大学机电工程学院,甘肃兰州 730050;兰州理工大学有色冶金新装备教育部工程研究中心,甘肃兰州 730050
- 折叠
摘要
为改善Ni3Al基合金的纳米切削表面质量以获得更好的服役状态,结合纳米级分子动力学模拟和微观切削实验,探讨了加载温度(300～1050 K)与切削力、表面形貌的关联性.分子动力学模拟结果显示,在纳米切削Ni3Al基合金过程中,加载温度为750 K时的切削力波动相对于其他温度最小;当加载温度在600～750 K时,影响表面形貌的凸起原子数量最少,即表明加载温度为750 K左右时,Ni3Al基合金可以获得较高的表面质量.Ni3Al基合金微观切削实验表明,当加载温度在600～750 K时,加工表面轮廓可以获得较高的平整度,间接验证了在Ni3Al基合金纳米切削的分子动力学仿真结果的可行性.研究结果表明,选取合适的加载温度是改善Ni3Al基合金纳米切削加工表面质量的有效途径.
Abstract
In order to enhance the nano-cutting surface quality of Ni3Al-based alloy to obtain better service state,the nano-molecule dynamics(MD)simulation and micro-cutting experiment were combined to investigate the effect of loading temperature(300-1050 K)on cutting force and surface morphology.MD simulation results show that the fluctuation of cutting force is the smallest when the loading temperature is 750 K during nano-cutting process of Ni3Al-based alloy,compared with that at other temperatures.When the loading temperature is 600-750 K,the number of convex atoms affecting the surface morphology is the least,which indicates that Ni3Al-based alloy can achieve higher surface quality at loading temperature of about 750 K.The micro-cutting experiments of Ni3Al-based alloy show that higher flatness of the processed surface can be obtained at the loading temperature of 600-750 K,which indirectly verifies the feasibility of MD simulation results of the nano-cutting process of Ni3Al-based alloy.Results suggest that selecting appropriate loading temperature is an effective method to improve the nano-cutting surface quality of Ni3Al-based alloy.
关键词
Ni3Al基合金/纳米切削/加工表面/加载温度/分子动力学仿真/微观切削实验Key words
Ni3Al-based alloy/nano-cutting/processed surface/loading temperature/molecular dynamics simulation/micro-cutting experiment引用本文复制引用
基金项目
Key Research and Development Project of Gansu(21YF5GA080)
出版年
2024
NETL
NSTL
万方数据