Table 7 Shows grey relational analysis.

From: Enhanced machining of Al 10%SiCmicro 1%SiCnano hybrid composite using rotary tool rotary workpiece EDM with bio dielectrics and treated tools

Both electrodes rotation direction

Tool treatment

Bio-dielectric

s/n ratio

Normalization

deviation sequence

Grey relational coefficient

Grade

rank

MRR

TWR

SR

MRR

TWR

SR

MRR

TWR

SR

MRR

TWR

SR

Opposite

HTT

Water–ethanol

29.899

7.799

− 7.328

0.879

0.930

0.338

0.121

0.070

0.662

0.806

0.878

0.430

0.705

2

Opposite

NTT

EDM oil

26.643

16.767

− 7.513

0.775

0.650

0.362

0.225

0.350

0.638

0.690

0.588

0.439

0.572

19

No rotation

CTT

Water–ethanol

18.916

7.462

− 12.413

0.528

0.941

1.000

0.472

0.059

0.000

0.514

0.895

1.000

0.803

1

Same

CTT

Water–ethanol

26.604

8.250

− 8.707

0.774

0.916

0.517

0.226

0.084

0.483

0.689

0.857

0.509

0.685

5

No rotation

HTT

Water–ethanol

2.415

17.187

− 12.203

0.000

0.637

0.973

1.000

0.363

0.027

0.333

0.579

0.948

0.620

15

Same

HTT

Water–ethanol

26.357

8.913

− 6.547

0.766

0.896

0.236

0.234

0.104

0.764

0.681

0.827

0.396

0.635

12

Same

HTT

EDM oil

23.217

8.106

− 7.421

0.666

0.921

0.350

0.334

0.079

0.650

0.599

0.863

0.435

0.632

13

No rotation

NTT

EDM oil

29.658

25.001

− 9.615

0.872

0.392

0.635

0.128

0.608

0.365

0.796

0.451

0.578

0.608

16

Opposite

HTT

EDM oil

29.464

15.899

− 9.020

0.865

0.677

0.558

0.135

0.323

0.442

0.788

0.607

0.531

0.642

11

No rotation

HTT

Bio diesel

24.028

15.351

− 6.848

0.692

0.694

0.275

0.308

0.306

0.725

0.618

0.620

0.408

0.549

21

Same

NTT

Water–ethanol

26.048

6.198

− 7.235

0.756

0.981

0.325

0.244

0.019

0.675

0.672

0.963

0.426

0.687

4

Same

NTT

EDM oil

10.559

19.266

− 7.140

0.261

0.571

0.313

0.739

0.429

0.687

0.403

0.538

0.421

0.454

27

Opposite

CTT

Bio diesel

24.017

23.606

− 7.513

0.691

0.436

0.362

0.309

0.564

0.638

0.618

0.470

0.439

0.509

26

Opposite

CTT

EDM oil

26.721

16.439

− 7.604

0.778

0.660

0.374

0.222

0.340

0.626

0.692

0.595

0.444

0.577

18

Same

NTT

Bio diesel

28.583

19.516

− 10.436

0.837

0.564

0.742

0.163

0.436

0.258

0.754

0.534

0.660

0.649

10

No rotation

NTT

Water–ethanol

6.783

9.504

− 11.364

0.140

0.877

0.863

0.860

0.123

0.137

0.368

0.803

0.785

0.652

9

No rotation

HTT

EDM oil

33.095

16.966

− 8.131

0.982

0.643

0.442

0.018

0.357

0.558

0.965

0.584

0.473

0.674

7

No rotation

CTT

EDM oil

33.668

19.629

− 8.045

1.000

0.560

0.431

0.000

0.440

0.569

1.000

0.532

0.468

0.667

8

Same

CTT

EDM oil

26.173

24.822

− 7.604

0.760

0.398

0.374

0.240

0.602

0.626

0.676

0.454

0.444

0.524

25

Same

HTT

Bio diesel

27.235

18.091

− 7.959

0.794

0.608

0.420

0.206

0.392

0.580

0.708

0.561

0.463

0.577

17

No rotation

NTT

Bio diesel

23.439

22.261

− 9.686

0.673

0.478

0.645

0.327

0.522

0.355

0.604

0.489

0.585

0.559

20

Opposite

CTT

Water–ethanol

23.087

6.065

− 8.787

0.661

0.985

0.528

0.339

0.015

0.472

0.596

0.970

0.514

0.694

3

Opposite

NTT

Water–ethanol

27.601

5.578

− 4.736

0.806

1.000

0.000

0.194

0.000

1.000

0.720

1.000

0.333

0.685

6

Opposite

NTT

Bio diesel

30.533

37.520

− 7.959

0.900

0.000

0.420

0.100

1.000

0.580

0.833

0.333

0.463

0.543

22

Opposite

HTT

Bio diesel

26.486

19.557

− 6.749

0.770

0.562

0.262

0.230

0.438

0.738

0.685

0.533

0.404

0.541

23

No rotation

CTT

Bio diesel

23.355

20.508

− 11.126

0.670

0.533

0.832

0.330

0.467

0.168

0.602

0.517

0.749

0.623

14

Same

CTT

Bio diesel

24.769

19.961

− 7.604

0.715

0.550

0.374

0.285

0.450

0.626

0.637

0.526

0.444

0.536

24

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