中国机械工程2017，Vol.28Issue(21)：2632-2638,7.DOI:10.3969/j.issn.1004-132X.2017.21.020
基于X射线衍射线形分析的铝合金切削表层晶体特征研究
Study on Crystal Characteristics of Aluminum Alloy Cutting Surface by X-ray Diffraction Profile Analysis
摘要
Abstract
In order to obtain a better understanding of the mechanism of cutting surface microstructure in the high-speed cutting processes and meet the strict requirements of various components on the service performance,based on micro view,the 7050-T7451 aluminum alloy was studied.For solving the problems that traditional observation method was difficult to obtain the statistical rule of grain sizes and dislocation densities,based on X-ray diffraction profile analyses such as Modified Warren-Averbach and Modified Williamson-Hall the methods were introduced into analyzing the microstructure of cutting surfaces from materials science and physics.Quantitative studies on microstructure of cutting surfaces under different cutting speeds were achieved.The results show that the machined surface is dominated by edge dislocations under high speed cutting conditions.The dislocation density values and rules are obtained.The formation mechanism is explained from plastic deformation and energy.The grain size distribution curve is fitted.The uniformities of the grains on the cutting surface are analyzed by the distribution function.When the cutting speed is higher than 4500 m/min,the cutted surfaces with relatively low dislocation density and uniform grain size may be obtained.关键词
位错密度/晶粒尺寸/高速切削/X射线衍射线形分析/表面质量Key words
dislocation density/grain size/high-speed cutting/X-ray diffraction profile analysis/surface quality分类
矿业与冶金引用本文复制引用
安增辉,李舜酩,付秀丽..基于X射线衍射线形分析的铝合金切削表层晶体特征研究[J].中国机械工程,2017,28(21):2632-2638,7.基金项目
国家自然科学基金资助项目(51675230) （51675230）
装备预研领域基金资助项目(6140210020116HK02001) （6140210020116HK02001）
国家重点研究和发展计划资助项目(2016YDF0700800) （2016YDF0700800）
