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Table 6 Measurement results of residual stresses on the surface of coarse and fine grain pure iron

From: Study on Cutting Force, Cutting Temperature and Machining Residual Stress in Precision Turning of Pure Iron with Different Grain Sizes

Number Coarse grain
\(\sigma_{c}\)(MPa)
Fine grain
\(\sigma_{c}\)(MPa)
\(w_{{\sigma_{c} }} \%\) Coarse grain
\(\sigma_{f}\) (MPa)
Fine grain
\(\sigma_{f}\)(MPa)
\(w_{{\sigma_{f} }} \%\)
1 214 219 ↓− 73.89 − 45 − 12 ↑2.22
2 249 270 ↑18.00 75 89 ↑8.75
3 309 312 ↑16.54 127 148 ↑0.81
4 381 234 ↓− 21.30 100 79 ↓− 38.58
5 356 359 ↓− 2.80 143 139 ↑0.84
6 403 314 ↑18.75 224 266 ↓− 22.19
7 438 425 ↑37.11 113 154 ↓− 3.08
8 439 365 ↓− 36.02 220 141 ↓− 16.91
9 409 321 ↓− 30.18 164 115 ↓− 21.56
10 461 386 ↑26.39 144 182 ↓− 16.37
11 401 396 ↓− 57.41 270 115 ↓− 1.43
12 396 431 ↑8.23 216 234 ↑8.71
13 394 432 ↓− 13.25 145 126 ↑9.72
14 414 413 ↑36.44 159 216 ↓− 0.18
15 428 430 ↑23.61 229 283 ↑0.41
16 384 439 ↑9.78 276 303 ↑14.26