Table 6.
(a) Descriptive statistics of indentation hardness, stiffness and indentation modulus of the surface of the tested materials—materials without aging; (b) Descriptive statistics of indentation hardness, stiffness and indentation modulus of the surface of the tested materials—materials after aging.
| (a) Descriptive Statistics of Indentation Hardness, Stiffness and Indentation Modulus of the Surface of the Tested Materials—Materials without Aging | ||||||
| Mechanical Size | Statistical Parameter | Materials without Aging | ||||
| M I | M II | M III | M V | M VI | ||
| N (no. of. specim.) = 5 | n (no. of. obs.) | 25 | 25 | 25 | 25 | 25 |
|
HIT (O & P) [MPa] |
Mean | 78.414 | 84.475 | 81.767 | 254.001 | 116.568 |
| Std Dev | 1.437 | 1.445 | 1.795 | 21.086 | 5.63 | |
| Min. | 76.06 | 80.087 | 77.102 | 211.728 | 107.606 | |
| Max. | 81.377 | 86.927 | 85.799 | 289.394 | 129.209 | |
| Median | 78.207 | 84.652 | 82.169 | 249.701 | 116.89 | |
| Shape (Weibull) | 61.572 | 67.557 | 52.147 | 13.893 | 23.579 | |
| Scale (Weibull) | 79.104 | 85.153 | 82.614 | 263.37 | 119.18 | |
|
S (O & P) [mN/μm] |
Mean | 383.728 | 315.936 | 372.101 | 420.71 | 1170.405 |
| Std Dev | 4.023 | 2.557 | 1.971 | 3.103 | 126.55 | |
| Min. | 374.736 | 311.198 | 368.443 | 414.862 | 682.258 | |
| Max. | 390.423 | 320.156 | 377.42 | 426.686 | 1394.335 | |
| Median | 384.018 | 315.211 | 371.749 | 420.5 | 1183.031 | |
|
EIT (O & P) [GPa] |
Mean | 1.918 | 1.639 | 1.899 | 3.788 | 7.16 |
| Std Dev | 0.033 | 0.023 | 0.027 | 0.172 | 0.757 | |
| Min. | 1.87 | 1.585 | 1.825 | 3.433 | 4.21 | |
| Max. | 1.989 | 1.672 | 1.953 | 4.088 | 8.57 | |
| Median | 1.911 | 1.638 | 1.9 | 3.742 | 7.229 | |
|
E* (O & P) [GPa] |
Mean | 2.108 | 1.801 | 2.086 | 4.163 | 7.868 |
| Std Dev | 0.036 | 0.025 | 0.03 | 0.189 | 0.832 | |
| Min. | 2.055 | 1.742 | 2.006 | 3.772 | 4.627 | |
| Max. | 2.185 | 1.838 | 2.146 | 4.492 | 9.417 | |
| Median | 2.1 | 1.8 | 2.088 | 4.113 | 7.944 | |
| (b) Descriptive statistics of indentation hardness, stiffness and indentation modulus of the surface of the tested materials—materials after aging | ||||||
| Mechanical size | Statistical parameter | Materials after aging | ||||
| M I AS | M II AS | M III AS | M V AS | M VI AS | ||
| N (no. of. specim.) = 5 | n (no. of. obs.) | 25 | 25 | 25 | 25 | 25 |
|
HIT (O & P) [MPa] |
Mean | 51.565 | 67.722 | 50.664 | 219.804 | 189.726 |
| Std Dev | 2.864 | 3.767 | 2.024 | 5.56 | 6.904 | |
| Min. | 46.261 | 60.433 | 46.551 | 207.193 | 178.742 | |
| Max. | 55.124 | 72.87 | 54.427 | 228.273 | 203.9 | |
| Median | 52.154 | 68.128 | 50.89 | 219.878 | 188.594 | |
| Shape (Weibull) | 20.454 | 20.66 | 29.162 | 46.17 | 31.090 | |
| Scale (Weibull) | 52.889 | 69.442 | 51.588 | 222.37 | 192.99 | |
|
S (O & P) [mN/μm] |
Mean | 249.884 | 256.947 | 254.125 | 401.786 | 481.595 |
| Std Dev | 2.7 | 5.212 | 2.931 | 5.267 | 5.916 | |
| Min. | 245.445 | 244.751 | 248.441 | 393.725 | 472.935 | |
| Max. | 254.98 | 263.548 | 260.178 | 410.869 | 489.864 | |
| Median | 249.783 | 257.835 | 253.171 | 401.018 | 483.139 | |
|
EIT (O & P) [GPa] |
Mean | 1.011 | 1.193 | 1.02 | 3.366 | 3.75 |
| Std Dev | 0.038 | 0.056 | 0.031 | 0.07 | 0.11 | |
| Min. | 0.941 | 1.073 | 0.956 | 3.208 | 3.602 | |
| Max. | 1.067 | 1.268 | 1.07 | 3.48 | 3.956 | |
| Median | 1.025 | 1.199 | 1.014 | 3.365 | 3.753 | |
|
E* (O & P) [GPa] |
Mean | 1.112 | 1.311 | 1.121 | 3.698 | 4.121 |
| Std Dev | 0.042 | 0.062 | 0.034 | 0.077 | 0.121 | |
| Min. | 1.034 | 1.179 | 1.05 | 3.526 | 3.958 | |
| Max. | 1.173 | 1.394 | 1.175 | 3.824 | 4.348 | |
| Median | 1.126 | 1.318 | 1.114 | 3.698 | 4.124 | |