精密车削镍基单晶高温合金去除机理仿真与实验
Simulation and Experiment of Removal Mechanism of Nickel-based Single Crystal Superalloy in Precision Turning
周云光 1王书海 1陈晗 1李明1
作者信息
- 1. 东北大学 机械工程与自动化学院,辽宁 沈阳 110819
- 折叠
摘要
为了探究精密车削镍基单晶高温合金微观尺度去除机理,首先,基于大规模原子/分子并行模拟器的分子动力学仿真法对仿真体系物理特性进行分析后,建立了金刚石刀具车削镍基单晶的车削仿真模型,并利用开源可视化工具分析得到了镍基单晶仿真车削过程中车屑的形成机制.然后,进行了镍基单晶高温合金车削去除机理实验研究,通过对车削镍基单晶高温合金亚表面微观组织的透射形貌和衍射分析,证实了去除机理仿真分析所得结果的准确性.仿真和实验结果表明,镍基单晶高温合金车削塑性去除机理为非晶演变型结构损伤、位错趋稳层错结构损伤和多晶相变结构损伤.
Abstract
To explore the micro-scale removal mechanism of precision turning nickel-based single crystal superalloy,the simulation model of nickel-based single crystal turning by the diamond tool was firstly established after an analysis of the simulated physical characteristics based on the molecular dynamics simulation method by large-scale atomic/molecular parallel simulators,and the chip formation mechanism during the simulation process of nickel-based single crystal turning was analyzed by using an open visualization tool.Then the experimental research on the removal mechanism of nickel-based single crystal superalloy was carried out.The accuracy of the removal mechanism simulation results is confirmed by the transmission morphology and diffraction analysis of the subsurface microstructure of nickel-based superalloy.The simulation and test results indicated that the mechanisms of plastic removal in the process of turning nickel-based single crystal superalloy are structural damage to amorphous evolution,structural damage to dislocation stabilised stacking faults and structural damage to polycrystalline phase transition.
关键词
镍基单晶高温合金/精密车削/去除机理/分子动力学仿真/结构演变Key words
nickel-based single crystal superalloy/precision turning/removal mechanism/molecular dynamics simulation/structural evolution引用本文复制引用
出版年
2024
NETL
NSTL
万方数据