OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 26 No. 1 2024 Ta b l e 3 Experimental data of Ra and temperature for SS 316, EN 8, SAE 8620 and Al 380 materials Run No. Speed, Vc, (m/min) Feed, f, (mm/ rev) doc, d, (mm) SS 316 Ra EN 8 Ra SAE 8620 Ra AL 380 Ra SS 316 Temp EN 8 Temp SAE 8620 Temp Al 380 Temp 1 190 0.12 0.7 0.73 0.84 0.63 2.88 635 636 629 243 2 290 0.12 0.7 0.56 0.66 0.50 1.73 812 657 733 264 3 190 0.2 0.7 1.39 1.54 1.60 3.56 643 654 648 247 4 290 0.2 0.7 1.22 1.31 1.25 2.24 997 672 741 318 5 190 0.12 0.9 0.74 0.92 0.55 2.95 782 647 675 236 6 290 0.12 0.9 0.62 0.74 0.59 1.93 1082 665 782 271 7 190 0.2 0.9 1.47 1.6 1.42 4.08 815 664 735 274 8 290 0.2 0.9 1.27 1.42 1.27 2.52 1157 679 818 334 9 140 0.16 0.8 1.08 1.32 1.12 4.25 732 644 595 229 10 340 0.16 0.8 0.78 1.03 0.80 1.86 1243 689 837 323 11 240 0.08 0.8 0.3 0.59 0.47 2.01 619 629 625 216 12 240 0.24 0.8 1.86 2.06 1.96 2.92 883 666 718 306 13 240 0.16 0.6 0.91 0.92 0.98 2 646 644 693 289 14 240 0.16 1 1.07 1.02 1.04 2.88 1082 653 791 310 15 240 0.16 0.8 1.01 0.95 0.99 2.12 805 649 704 283 16 240 0.16 0.8 0.92 1 0.96 2.24 766 642 694 291 17 240 0.16 0.8 0.93 0.94 1.00 2.31 775 644 699 293 18 240 0.16 0.8 0.99 0.94 1.00 2.09 764 645 701 296 19 240 0.16 0.8 0.96 0.94 1.00 2.1 769 644 703 298 20 240 0.16 0.8 0.98 0.95 1.00 2.08 765 643 701 297 The regression equations for material temperature are given below. 2 2 3,517 2.74 696 8645 0.01054 3, 963 c c SSTemp V f d V f = - + - + + + 2 699 6.6 1.57 3, 281 ; c c d V xf V xd fxd + - - (V) 2 2 1, 073 0.57 457 1,899 0.00210 3, 672 c c SAETemp V f d V f = + + - + - + 2 1,175 2.14 0.175 2,156 ; c c d V xf V xd fxd - - + (VI) 2 2 2 748 0.787 87 175 0.002436 838 159 c c ENTemp V f d V d f = - + - + + + - 0.375 0.150 63 ; c c V xf V xd fxd - - (VII) 2 2 2 239 0.579 39 353 0.001918 5341 108 c c AlTemp V f d V d f = + + - - - + + 4.69 0.075 1,344 . c c V xf V xd fxd - + (VIII) Buckingham’s π theorem This study uses the dimensional homogeneity principle of Buckingham’s π theorem [22]. Table 4 shows the mechanical properties of the materials.
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