施渊吉,程诚,王捍天,滕冰妍,陈显冰,何延辉,张涛,黎军顽,郭训忠.基于分子动力学研究刚性磨粒划擦铝基材料去除行为[J].表面技术,2022,51(1):229-239.
SHI Yuan-ji,CHENG Cheng,WANG Han-tian,TENG Bing-yan,CHEN Xian-bing,HE Yan-hui,ZHANG Tao,LI Jun-wan,GUO Xun-zhong.Analysis of Material Remove Behavior Induced by Rigid Abrasive Particle for Aluminum Substrate on Scratching Based on Atomic Simulation[J].Surface Technology,2022,51(1):229-239
基于分子动力学研究刚性磨粒划擦铝基材料去除行为
Analysis of Material Remove Behavior Induced by Rigid Abrasive Particle for Aluminum Substrate on Scratching Based on Atomic Simulation
投稿时间:2020-11-29  修订日期:2021-05-03
DOI:10.16490/j.cnki.issn.1001-3660.2022.01.024
中文关键词:  亚表层滑移  分子动力学  材料去除  飞秒激光辅助加工  单晶铝
英文关键词:sub-surface slip  molecular dynamics  material removal  femtosecond laser processing  single crystal aluminum
基金项目:江苏省高等学校自然科学基金面上项目(19KJB430024);江苏省工业软件工程技术研究开发中心开放基金重点项目(ZK190401);南京工业职业技术大学国家自然科学基金培育项目(YK190109)
作者单位
施渊吉 南京工业职业技术大学,南京 210046;南京航空航天大学 材料科学与技术学院,南京 210016 
程诚 南京航空航天大学 材料科学与技术学院,南京 210016 
王捍天 南京工业职业技术大学,南京 210046 
滕冰妍 南京工业职业技术大学,南京 210046 
陈显冰 南京工业职业技术大学,南京 210046 
何延辉 南京工业职业技术大学,南京 210046 
张涛 南京工业职业技术大学,南京 210046 
黎军顽 上海大学 材料科学与工程学院,上海 200072 
郭训忠 南京航空航天大学 材料科学与技术学院,南京 210016 
AuthorInstitution
SHI Yuan-ji Nanjing Vocational University of Industry Technology, Nanjing 210046, China;College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 
CHENG Cheng College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 
WANG Han-tian Nanjing Vocational University of Industry Technology, Nanjing 210046, China 
TENG Bing-yan Nanjing Vocational University of Industry Technology, Nanjing 210046, China 
CHEN Xian-bing Nanjing Vocational University of Industry Technology, Nanjing 210046, China 
HE Yan-hui Nanjing Vocational University of Industry Technology, Nanjing 210046, China 
ZHANG Tao Nanjing Vocational University of Industry Technology, Nanjing 210046, China 
LI Jun-wan School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China 
GUO Xun-zhong College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 
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中文摘要:
      目的 实现材料高效去除,避免亚表层严重滑移,以及改善已划擦区表面形貌质量。方法 基于EAM和Morse混合势函数,采用分子动力学法对刚性磨粒划擦Al材料的去除行为展开研究,分析磨粒尺寸、温度、压深、速度对材料去除行为的影响,并提出飞秒激光辅助加热改善材料塑性去除行为的方法。结果 不同划擦因素变化对Al材料去除、表面形貌质量、亚表层滑移等方面影响显著,经飞秒激光辅助处理的表面,在划擦中能有效改善已划擦区的表面形貌质量,降低亚表层滑移程度。增加磨粒尺寸、温度、压深,有利于表面材料去除,更易将磨屑原子向沟槽边缘两侧挤出,造成磨屑堆积程度增加。另外,划擦速度越高,已划擦区的表面形貌质量获得相应改善,并有效减弱了其亚表层滑移程度。相比无激光辅助处理,经过飞秒激光处理的表面,在划擦中不仅有利于提高材料去除率,而且有效降低了磨粒与基底接触区域的应力集中度和亚表层滑移程度,明显改善了已划擦区的表面形貌质量。结论 为了获得较好已划擦区的表面形貌质量,且避免应力集中导致亚表层滑移严重,除了需要考虑飞秒激光辅助加热外,还需权衡加热源区深度尺寸与压深的关系,即宜取辅助热源区深度尺寸上下范围10%作为压深值。
英文摘要:
      This work aims at Al material removed effectively with some good advantages, such as reduced sub-surface slip and improved surface morphology quality. Thus, molecular dynamics method was applied to investigate the remove behavior of Al material scratched by rigid abrasive particles. Based on EAM and Morse functions, the influence of such crucial factors as abrasive size, temperature, indentation depth, scratching velocity on the remove behavior of Al material was analyzed, thus, the heating source produced by femtosecond laser processing was proposed to improve machined surface quality. It was found that above important factors have obvious influence on remove behavior of Al material, surface morphology quality and sub-surface slip. The scratched surface processed by femtosecond laser will get improved surface morphology quality and reduced sub- surface slip while scratching. At the same time, it shows that it is easier to extrude the wear debris produced to both edges of the groove, resulting in the increase of the wear debris accumulation due to bigger particle size, higher temperature, and larger indentation depth. What is more, the higher scratching velocity is, the scratched surface morphology gets better improvement and the sub-surface slip reduces effectively. Compared with non-laser processing, femtosecond laser processing can not only improve the material removal rate, but also effectively decrease the stress concentration degree and sub-surface slip degree in the contact area between the abrasive particles and the substrate, as well as obviously improve the surface morphology quality of the scratched area. In a word, it is a better strategy to achieve better surface morphology quality and avoid stress concentration through femtosecond laser processing, in connection with the indentation depth, that is, around 10% of the depth size of the assisted heat source area should be taken as the indentation depth.
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