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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 42 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