Experimental Investigation on the Surface Integrity of Titanium Alloy TC4 in Abrasive Belt Grinding

2013 ◽  
Vol 716 ◽  
pp. 185-190
Author(s):  
He Ping Wei ◽  
Yun Huang ◽  
Zhao Yang Liu
Keyword(s):  
Residual Stress ◽  
Experimental Investigation ◽  
Titanium Alloy ◽  
Surface Integrity ◽  
Cutting Speed ◽  
Velocity Range ◽  
Belt Grinding ◽  
Surface Residual Stress ◽  
Abrasive Belt ◽  
Surface Burn

This paper aimed at that titanium alloy grinding is easy to appear surface burn, crack, then carry out the titanium alloy TC4 abrasive belt grinding experiment, focus on the effect of grinding parameters on the titanium alloy TC4 surface integrity (surface roughness, microstructure and surface residual stress) . The results of the study show that the use of zircon corundum belt and cutting speed velocity range from 18 to 26 meter per second, the surface integrity of titanium alloy TC4 is better.

scholarly journals Residual Stress of a TC17 Titanium Alloy after Belt Grinding and Its Impact on the Fatigue Life

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2218 ◽  
Author(s):  
Yi He ◽  
Guijian Xiao ◽  
Wei Li ◽  
Yun Huang
Keyword(s):  
Residual Stress ◽  
Titanium Alloy ◽  
Fatigue Life ◽  
Compressive Stress ◽  
Contact Force ◽  
Residual Compressive Stress ◽  
Feed Speed ◽  
Belt Grinding ◽  
Surface Residual Stress ◽  
Abrasive Belt

Titanium alloy materials are widely used in the design of key parts, such as aeroengine blades and integral blades. The surface residual stress has a great influence on the fatigue life of the parts mentioned above. Presently, abrasive belt grinding can form residual stress on the surface. However, the formation mechanism has not yet been revealed, providing the impetus for the present study. First of all, the surface residual stress is characterized based on Bragg’s law. The influence of contact force, reciprocating frequency, and feed speed on the residual stress of a titanium alloy abrasive belt grinding is obtained using an experimental method. The residual stress model is simulated by the tensile force on the surface of the model, and the fatigue life of the bar under a sinusoidal tensile load is analyzed by simulating the fatigue test of the titanium alloy bar. Finally, fatigue testing and fracture analysis are carried out. The experimental results show that with the increase of the grinding contact force, increase of the reciprocating frequency, and decrease of the feed speed, the residual compressive stress on the surface of the parts increases and the fatigue life is higher at the same working stress level. It also shows that the residual compressive stress produced by abrasive belt grinding is in the range of 120–300 MPa. The fatigue simulation curve’s inflection point appears at the level of 550 MPa. The error between the simulation data and the experimental data is less than 10%, which shows the accuracy of the simulation experiment. The fracture morphology at room temperature is a ductile fracture with fine equiaxed dimples.

Surface Integrity and Fatigue Property of a High Speed Milled Titanium Alloy

2008 ◽  
Vol 53-54 ◽  
pp. 305-310 ◽  
Author(s):  
Guo Sheng Geng ◽  
Jiu Hua Xu
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Titanium Alloy ◽  
Surface Integrity ◽  
Work Hardening ◽  
High Speed ◽  
Cutting Speed ◽  
Fatigue Property ◽  
Machined Surface ◽  
Metallurgical Structure

Surface integrity has a great effect on the fatigue property of titanium alloy. The surface integrity and fatigue property of a high speed milled Ti-6.5Al-2Zr-1Mo-1V (TA15) titanium alloy were investigated in this research. The main objective of this paper is to study the influence of milling speed on the surface integraty and fatigue property of the machined part. The surface roughness, work hardening, metallurgical structure and residual stress of the machined surface were studied in a cutting speed range of from 50m/min to 300m/min. To verify the relationship between cutting speed and the surface integrity of machined surface, the fatigue property of titanium alloy specimens milled at four different cutting speeds ranging from 50 to 200m/min were compared at two stress levels. This research shows that the cutting speed has little effect on the work hardening, metallurgical structure and residual stress, but the surface roughness decreases with the increasing cutting speed. Therefore, increasing milling speed has a positive effect on the surface integrity and fatigue property of the machined surface.

scholarly journals Prediction of Surface Residual Stress on Titanium Alloy generated by Belt Grinding using Molecular System Dynamics

Procedia CIRP ◽  
2020 ◽  
Vol 87 ◽  
pp. 480-484
Author(s):  
Huang Yun ◽  
Liu Shuai ◽  
Xiao Guijian ◽  
He Yi ◽  
Wang Wenxi ◽  
...  
Keyword(s):  
Residual Stress ◽  
Titanium Alloy ◽  
System Dynamics ◽  
Molecular System ◽  
Belt Grinding ◽  
Surface Residual Stress

A multi-particle abrasive model for investigation of residual stress in belt grinding of titanium alloys

2021 ◽  
pp. 095440542110079
Author(s):  
Guijian Xiao ◽  
Kangkang Song ◽  
Huawei Zhou ◽  
Yi He ◽  
Wentao Dai
Keyword(s):  
Residual Stress ◽  
Titanium Alloy ◽  
Simulation Model ◽  
Fe Simulation ◽  
Service Performance ◽  
Belt Grinding ◽  
Surface Residual Stress ◽  
Technical Problems ◽  
Grinding Parameters ◽  
Aero Engine

The titanium alloy blade is a key part of an aero-engine, but its high surface efficiency and precision machining present technical problems. Belt grinding can effectively prolong the fatigue life of the blade and enhance the service performance of the aero-engine. However, the residual stress of the workpiece after belt grinding directly affects its service performance and life. The traditional single particle abrasive model simulation is limited in exploring the influence of grinding process parameters on surface residual stress. In this study, an ABAQUS simulation model of multi-particle belt grinding is established for titanium alloy material, a finite element (FE) simulation is conducted with different technological parameters, and the results are analysed. The critical belt grinding experiment is conducted on thin-walled titanium alloy parts, and the distribution characteristics of surface residual stress after grinding are studied to understand the influence of grinding parameters on the formation of surface residual stress. Comparing the results of the FE simulation and the grinding experiment, the common law of stress change and the prediction model are obtained. The results show that the multi-particle belt grinding simulation is consistent with the belt grinding experiment in terms of the influence of grinding parameters on residual stress. The simulation can serve as a guide in actual belt grinding to some extent. Directions for improving the multi-particle abrasive simulation model are discussed.

Experimental Research on Surface Residual Stress of Quenched GCr15 Steel in Ultrasonic Aided Turning

2013 ◽  
Vol 797 ◽  
pp. 657-662
Author(s):  
Feng Jiao ◽  
Xiang Liu ◽  
Chong Yang Zhao ◽  
Xiong Zhang
Keyword(s):  
Residual Stress ◽  
Compressive Stress ◽  
Surface Integrity ◽  
Hard Turning ◽  
Cutting Speed ◽  
Residual Compressive Stress ◽  
Depth Of Cut ◽  
Surface Residual Stress ◽  
Machined Surface ◽  
Gcr15 Steel

Surface residual stress has become one of the important indexes measuring surface integrity in hard turning of precision parts. The type of surface residual stress and the influence rules of cutting parameters on surface residual stress in hard turning of GCr15 steel are studied in this paper. Research results show that no matter in common or ultrasonic turning, tangential surface residual compressive stress can be found in machined surface. The effect of cutting speed on the residual compressive stress is the greatest, the effect of feed rate takes the second place and the effect of depth of cut is minimal. The conclusions have provided experimental basis for enhancing the surface integrity of quenched GCr15 steel precision parts.

scholarly journals Surface Integrities of Different Trajectories in Belt Grinding for Pure Iron Functional Performance Test Pieces

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 123 ◽  
Author(s):  
Ying Liu ◽  
Wentao Dai ◽  
Guijian Xiao ◽  
Yun Huang
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Functional Properties ◽  
Pure Iron ◽  
Performance Test ◽  
Functional Performance ◽  
Micro Hardness ◽  
Belt Grinding ◽  
Surface Residual Stress ◽  
Abrasive Belt

In order to reduce the influence of surface burns and other defects in the processing of pure iron parts for a functional properties test, and to improve the accuracy and usability of the test results, abrasive belt grinding is used for surface grinding. Because of the long circumference of the belt, and the long cooling time of the abrasive particles, cold grinding can be achieved, so that the incidence of surface burns, machining hardening, and other defects can be reduced. An experimental platform for belt grinding of pure iron parts for a functional properties test was built, and corresponding belt grinding experiments were carried out. The influences of grinding parameters, such as belt velocity, feed velocity, the grinding track on the microcosmic morphology, surface roughness, surface residual stress, and micro-hardness were studied. The results showed that belt grinding improved the surface integrity, the surface roughness was less than Ra 0.4 μm, the surface residual stress ranged from −253.84 MPa to −164.14 MPa, and the micro-hardness ranged from 118 HV to 170 HV. Furthermore, to get the workpiece surface to mostly suit the functional performance test, a high abrasive belt linear speed, a low grinding depth, and a feed speed should be selected, and the processing should be conducted with a circular trajectory.

scholarly journals Research on Cutting Force and Surface Integrity of TC18 Titanium Alloy by Longitudinal Ultrasonic Vibration Assisted Milling

2021 ◽  
Author(s):  
Weibo Xie ◽  
Xikui Wang ◽  
Erbo Liu ◽  
Jian Wang ◽  
Xiaobin Tang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
Ultrasonic Vibration ◽  
Surface Integrity ◽  
Rotational Speed ◽  
Three Dimensional ◽  
Cutting Temperature ◽  
Surface Residual Stress ◽  
Deformation Layer ◽  
Vibration Milling

Abstract In order to study the influence of rotational speed and amplitude on the surface integrity, TC18 titanium alloy samples were milled by the process of conventional milling and longitudinal ultrasonic vibration assisted milling. The experimental data were obtained by dynamometer, thermometer, scanning electron microscope, X-ray diffractometer and three-dimensional surface topography instrument for observation and analysis. The results show that the rotational speed has a significant effect on the cutting force, cutting temperature, surface morphology and surface residual stress. Compared with ordinary milling, the surface micro-texture produced by ultrasonic vibration milling is more regular, , and with the increase of rotational speed, the influence of ultrasonic vibration on cutting force and cutting temperature decrease. There are adverse effects on surface roughness after ultrasonic vibration superposition. The influence of ultrasonic vibration on the surface residual compressive stress is also greatly reduced when the rotational speed is greater than 2400 rpm. In addition, a certain depth of plastic deformation layer can be formed under the surface of ultrasonic vibration machining, and the depth of deformation layer increases with the increase of vibration.

Effect of Milling Speed and Feed on Surface Residual Stress of 7050-T7451 Aluminum Alloy

2012 ◽  
Vol 499 ◽  
pp. 217-222 ◽  
Author(s):  
C. Li ◽  
Yi Wan ◽  
R.R. Zhang ◽  
Zhan Qiang Liu
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Cutting Speed ◽  
Diffraction Method ◽  
Cutting Condition ◽  
Feed Speed ◽  
X Ray Diffraction ◽  
Surface Residual Stress ◽  
Orthogonal Direction ◽  
Machined Surface

The residual stress in the milling of 7050-T7451 aluminum alloy was measured using X-ray diffraction method in which Psi-oscillation, Phi-oscillation and peak fit were adopted. Cutting speed and feed are main variables which were considered in this study. The results show that compressive residual stresses are generated in surface for the down milling generally, which is mainly due to burnishing effect between the tools flank face and the machined surface. In feed and its orthogonal direction, the effect of cutting speed and feed speed on residual stress is similar. Therefore, required residual stress can be achieved by controlling the cutting condition such as cutting speed, feed speed etc.

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