Table 5 Statistical analysis of the fitted models, reporting the p values for the model variables.
Coefficients | Standard error | t statistic | p-value | |||
|---|---|---|---|---|---|---|
Ultimate strength | Linear model | Intercept | 2.0778 | 0.1555 | 13.3631 | 1.446 × 10−8 |
RHA content | 0.0545 | 0.0133 | 4.0868 | 1.508 × 10−3 | ||
Quadratic model | Intercept | 1.7704 | 0.1566 | 11.3070 | 2.139 × 10−7 | |
RHA content | 0.1615 | 0.0366 | 4.4098 | 1.046 × 10−3 | ||
RHA content squared | −0.0053 | 0.0017 | −3.0433 | 1.118 × 10−2 | ||
Young’s modulus | Linear model | Intercept | 130.8201 | 14.6625 | 8.9221 | 1.210 × 10−6 |
RHA content | −0.5313 | 1.2576 | −0.4225 | 6.801 × 10−1 | ||
Quadratic model | Intercept | 122.0766 | 19.6184 | 6.2225 | 6.506 × 10−5 | |
RHA content | 2.5117 | 4.5877 | 0.5475 | 5.950 × 10−1 | ||
RHA content squared | −0.1514 | 0.2191 | −0.6910 | 5.039 × 10−1 | ||
Yield stress | Linear model | Intercept | 1.8569 | 0.1187 | 15.6428 | 2.403 × 10−9 |
RHA content | 0.0498 | 0.0102 | 4.8922 | 3.708 × 10−4 | ||
Quadratic model | Intercept | 1.6530 | 0.1313 | 12.5909 | 7.087 × 10−8 | |
RHA content | 0.1208 | 0.0307 | 3.9340 | 2.336 × 10−3 | ||
RHA content squared | −0.0035 | 0.0015 | −2.4081 | 3.473 × 10−2 | ||
Plastic work | Linear model | Intercept | 0.3415 | 0.0248 | 13.7686 | 1.031 × 10−8 |
RHA content | 0.0085 | 0.0021 | 3.9942 | 1.780 × 10−3 | ||
Quadratic model | Intercept | 0.3084 | 0.0302 | 10.2231 | 5.928 × 10−7 | |
RHA content | 0.0200 | 0.0071 | 2.8351 | 1.622 × 10−2 | ||
RHA content squared | −0.0006 | 0.0003 | −1.6989 | 1.174 × 10−1 |
