Comparative analysis of single-crater parameters in ultrasonic-assisted and unassisted micro-EDM of Ti6Al4V using discharge plasma imaging  

作　　者：Sohaib Raza Chandrakant Nirala 

机构地区：[1]Department of Mechanical Engineering,Indian Institute of Technology Ropar,Punjab 140001,India

出　　处：《Nanotechnology and Precision Engineering》2024年第2期11-24,共14页纳米技术与精密工程（英文）

基　　金：support from the Department of Science and Technology (DST),Government of India (Grant No.ECR/DST/2017/000918);the Indian Institute of Technology Ropar for providing financial support under an ISIRD grant (F.No.9-282/2017IITRPR/705).

摘　　要：Ultrasonic-assisted micro-electro-discharge machining(EDM)has the potential to enhance processing responses such as material removal rate(MRR)and surface finish.To understand the reasons for this enhancement,the physical mechanisms responsible for the individual discharges and the craters that they form need to be explored.This work examines features of craters formed by single discharges at various parameter values in both conventional and ultrasonic-assistedEDM of Ti6Al4V.High-speed imaging of the plasma channel is performed,and data on the individual discharges are captured in real-time.A 2D axisymmetric model using finite element software is established to model crater formation.On the basis of simulation and experimental results,a comparative study is then carried out to examine the effects of ultrasonic vibrational assistance on crater geometry.For every set ofEDM parameters,the crater diameter and depth from a single discharge are found to be higher in ultrasonic-assistedEDM than in conventionalEDM.The improved crater geometry and the reduced bulge formation at the crater edges are attributed to the increased melt pool velocity and temperature predicted by the model.

关 键 词：Ultrasonic vibration Discharge crater Plasma diameter Single discharge 

分 类 号：TG661[金属学及工艺—金属切削加工及机床] TG146.23[一般工业技术—材料科学与工程]