Research Article
Investigation in Gas Carburizing of AISI 4140, EN36, and 16MnCr5 Steels Using the Grey Incidence-Based Taguchi (GIBT) Method
Table 3
Quality index (GIG values).
| Trial | S/N ratio | Normalized S/N ratio | Grey incidence coefficient | GIG | SH | DD | WL | SH | DD | WL | SH | DD | WL |
| 1 | 55.276 | 35.265 | 33.271 | 0.307 | 0.753 | 0.450 | 0.419 | 0.669 | 0.476 | 0.5216 | 2 | 55.321 | 35.848 | 33.146 | 0.403 | 0.862 | 0.379 | 0.456 | 0.784 | 0.446 | 0.5619 | 3 | 55.186 | 35.559 | 32.770 | 0.114 | 0.808 | 0.165 | 0.361 | 0.722 | 0.374 | 0.4859 | 4 | 55.343 | 35.703 | 34.172 | 0.451 | 0.835 | 0.965 | 0.477 | 0.752 | 0.935 | 0.7210 | 5 | 55.283 | 36.585 | 32.482 | 0.323 | 1.000 | 0.000 | 0.425 | 1.000 | 0.333 | 0.5861 | 6 | 55.133 | 35.833 | 33.127 | 0.000 | 0.859 | 0.368 | 0.333 | 0.780 | 0.442 | 0.5185 | 7 | 55.599 | 35.489 | 34.100 | 1.000 | 0.795 | 0.924 | 1.000 | 0.709 | 0.868 | 0.8590 | 8 | 55.336 | 31.243 | 34.233 | 0.435 | 0.000 | 1.000 | 0.469 | 0.333 | 1.000 | 0.6009 | 9 | 55.417 | 35.984 | 33.566 | 0.610 | 0.887 | 0.619 | 0.562 | 0.816 | 0.567 | 0.6484 |
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