Table 12 Modified KME model parameters for 6061-T651
From: Overview of aluminum alloy mechanical properties during and after fires
Parameter | Significance | Value | Source |
|---|---|---|---|
θ 0 | θ if no dynamic precipitation or Orowan loops | 655 MPa | Minimum θ measured for all heating conditions |
β min | β at maximum σ y | 5.9 | Minimum β measured for all heating conditions |
k θdp | Constant for θ dp for dynamic precipitation effects | 1210 MPa | θ for a solution heat treated sample and the AR material |
\( {\sigma}_y^{max} \) | maximum yield strength (T6 state) | 324 MPa | σ y of as-received material |
k β | Constant linking σ y to β | 10.6 | β for a solution heat treated sample and the AR material |
r cl | Equivalent radius of loss of coherency | 8 nm | \( \overline{r} \) of θ and β transition |
L 0 | Mean value of distance between two dislocations of opposite sign | 42Â nm | Modified Taylor hardening relation |
α | Constant linking shear stress to dislocation density | 0.15 | Optimized from θ of 20°C/min samples |
y p | Annihilation distance when at least one precipitate exists between dislocations of opposite sign | 13 nm | Optimized from β of 20°C/min samples |