Optimization of material removal rate and surface characterization of wire electric discharge machined Ti-6Al-4V alloy by response surface method

被引:9
|
作者
Doreswamy, Deepak [1 ]
Shreyas, D. Sai [1 ]
Bhat, Subraya Krishna [2 ]
Rao, Rajath N. [3 ]
机构
[1] Manipal Acad Higher Educ, Manipal Inst Technol, Dept Mechatron, Manipal 576104, Karnataka, India
[2] Manipal Acad Higher Educ, Manipal Inst Technol, Dept Mech & Mfg Engn, Manipal 576104, Karnataka, India
[3] NMAM Inst Technol, Dept Mech Engn, Nitte 574110, Karnataka, India
关键词
Wire-EDM; material removal rate; ANOVA; peak current; pulse on time; pulse off time; TITANIUM-ALLOY; PERFORMANCE-CHARACTERISTICS; EDM; MACHINABILITY; WEDM;
D O I
10.1051/mfreview/2022016
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Wire electric discharge machining (WEDM) is one of the foremost methods which has been utilized for machining hard-to-cut materials like Titanium alloys. However, there is a need to optimize their important operating parameters to achieve maximum material removal rate (MRR). The present paper investigates the effect of control factors like current, pulse on time (T-on), pulse off time (L-off) on MRR of machining of Ti-6Al-4V alloy. The study showed that, increase in current from 2 A to 6 A results in a significant increase in MRR by 93.27% and increase in T-off from 20 mu s to 35 mu s improved the MRR by 7.98%, beyond which there was no improvement of MRR. The increase in T-off showed a counterproductive effect. Increase in T-off from 10 mu s to 30 mu s showed an almost linear decrease in MRR by 52.77%. Morphological study of the machined surface showed that cut surface consists of recast layer on which microcracks were present, and revealed the presence of globules, ridge-structured formations of recast layers and voids. In addition, a regression model was developed to predict the MRR with respect to the control factors, which showed a good prediction with an R-2 value of 99.67%.
引用
收藏
页数:11
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