Intermethod Comparison and Evaluation of Measured Near Surface Residual Stress in Milled Aluminum
Intermethod Comparison and Evaluation of Measured Near Surface Residual Stress in Milled Aluminum
复制标题
铣削铝近表面残余应力测量的方法间比较和评估
DOI：
10.1007/s11340-021-00734-5
复制
发表时间：
2021
影响因子：
2.4
通讯作者：
Hill, M. R.
中科院分区：
文献类型：
--
作者：
Chighizola, C. R.;D’Elia, C. R.;Weber, D.;Kirsch, B.;Aurich, J. C.;Linke, B. S.;Hill, M. R.
BackgroundWhile near surface residual stress（NSRS）from milling is a driver for distortion in aluminum parts there are few studies that directly compared available techniques for NSRS measurement.我们报告了四种不同技术的应用和评估，用于评估铣削铝零件中的残余应力与深度的关系。MethodsThe four techniques are：钻孔、开槽、cos（α）x射线衍射（XRD）和sin 2（x2）XRD，所有这些都包括增量材料去除以产生应力与深度的关系曲线。铣削的铝部件从应力消除板AA 7050-T7451上切割，使用一系列工作台和工具速度在几个样品中铣削大的平坦表面。NSRS测量在指定的位置上的每个sample. ResultsResultsResults数据显示，NSRS从三种技术是在一般协议：钻孔，开槽，和正弦2（正弦）XRD。在较浅的深度（< 0.03 mm），sin 2（π）XRD数据具有最佳的可重复性（< 15 MPa），但在较大的深度（> 0.04 mm），钻孔和开槽具有最佳的可重复性（< 10 MPa）。由cos（α）XRD得到的NSRS数据与其他技术得到的数据不同，重复性较差。NSRS数据为不同的铣削参数表明，NSRS的深度增加与饲料每齿，是不受切削speed.ConclusionHole-Drilling，开槽，和sin 2（X射线衍射）评估铣削引起的近表面残余应力时，铝提供了可比的结果。结合一个简单的变形测试，包括删除1毫米厚的晶片在铣削表面，与同伴的应力分析表明，NSRS数据从钻孔是最一致的铣削引起的变形。
BackgroundWhile near surface residual stress (NSRS) from milling is a driver for distortion in aluminum parts there are few studies that directly compare available techniques for NSRS measurement.ObjectiveWe report application and assessment of four different techniques for evaluating residual stress versus depth in milled aluminum parts.MethodsThe four techniques are: hole-drilling, slotting, cos(α) x-ray diffraction (XRD), and sin2(ψ) XRD, all including incremental material removal to produce a stress versus depth profile. The milled aluminum parts are cut from stress-relieved plate, AA7050-T7451, with a range of table and tool speeds used to mill a large flat surface in several samples. NSRS measurements are made at specified locations on each sample.ResultsResulting data show that NSRS from three techniques are in general agreement: hole-drilling, slotting, and sin2(ψ) XRD. At shallow depths (< 0.03 mm), sin2(ψ) XRD data have the best repeatability (< 15 MPa), but at larger depths (> 0.04 mm) hole-drilling and slotting have the best repeatability (< 10 MPa). NSRS data from cos(α) XRD differ from data provided by other techniques and the data are less repeatable. NSRS data for different milling parameters show that the depth of NSRS increases with feed per tooth and is unaffected by cutting speed.ConclusionHole-drilling, slotting, and sin2(ψ) XRD provided comparable results when assessing milling-induced near surface residual stress in aluminum. Combining a simple distortion test, comprising removal of a 1 mm thick wafer at the milled surface, with a companion stress analysis showed that NSRS data from hole-drilling are most consistent with milling-induced distortion.