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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Electro-discharge Machining Performance of Ti-6Al-4V Alloy: Studies on Parametric Effect and Phenomenon of Electrode Wear
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Electro-discharge Machining Performance of Ti-6Al-4V Alloy: Studies on Parametric Effect and Phenomenon of Electrode Wear

机译：Ti-6AL-4V合金的电放电加工性能：参数效应和电极磨损现象的研究

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摘要

In the present work, machinability of titanium alloy (Ti-6Al-4V) is examined during electro-discharge machining (EDM). Experiments are conducted by varying peak discharge current and pulse-on duration; the EDM performance is assessed in terms of material removal efficiency, and rate of tool wear. Surface integrity of the machined specimen is evaluated in purview of surface morphology and topographical features including surface roughness, surface crack density, white layer thickness, material migration, phase transformation, residual stress, and microindentation hardness. Effects of input parameters on EDM performance of Ti-6Al-4V are discussed. Phenomenon of tool wear during EDM operation is interpreted with carbide formation at the bottom surface of the tool electrode. Maximum material removal rate (approximate to 2.71) is obtained at (Ip=25A, Ton=200s). Surface roughness of the EDMed specimen varies from 2.26 to 4.08m. The lowest energy input (Ip=6A, Ton=50s) achieves minimum surface roughness (Ra approximate to 2.26m). Microhardness values are found falling in the rage from 355.66 to 418.66 HV which is relatively more than as-received' parent material. White layers obtained in different parametric settings vary from 15.63 to 150m). Higher energy input promotes formation of thicker white layer. Variation of surface crack density is observed within rage 0.000642 to 0.003369m/m2. Significant amount of C, Cu, and O immigration is detected through EDS analysis of the machined surface. EDMed surface along with bottom surface of worn out tool electrode are enriched with hard carbide layers.
机译：在本工作中，在电放电加工（EDM）期间检查钛合金（TI-6AL-4V）的可加工性。通过不同的峰值放电电流和脉冲持续时间进行实验;在材料去除效率和工具磨损率方面评估EDM性能。在表面形貌和地形特征的范围内评估加工样本的表面完整性，包括表面粗糙度，表面裂缝密度，白色层厚度，材料迁移，相变，残余应力和微观化硬度。讨论了输入参数对TI-6AL-4V的EDM性能的影响。 EDM操作期间的工具磨损现象被刀具电极底表面的碳化物形成解释。获得最大材料去除速率（近似为2.71）（IP = 25A，TON = 200秒）。摄入标本的表面粗糙度从2.26变化到4.08米。最低能量输入（IP = 6A，TON = 50S）实现最小表面粗糙度（RA近似为2.26米）。发现显微硬度值从355.66到418.66 HV的愤怒中落下，其相对较高的“母材”。在不同的参数设置中获得的白色层可从15.63到150米之间变化。较高的能量输入促进较厚的白色层的形成。在Rage 0.000642至0.003369m / m 2的RAGE中观察到表面裂纹密度的变化。通过对加工表面的EDS分析检测大量的C，Cu和O移民。与破旧的刀具电极的底表面一起富含碳化物层。

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