4. Hardening laws

4.1 Cold forming

Given the complexity of microstructural evolutions in plastic deformation, we will adopt a relatively simple approach, due essentially to Kocks and Mecking [18] , [19] , to describe the microscopic strain hardening rate dτ / dγ in terms of a single internal variable: the dislocation density ρ and its evolution dρ using the relation : $\frac{d τ}{d γ} = \frac{d τ}{d ρ} \frac{d ρ}{d γ}$

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Hardening laws

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Bibliography

References

(1) - LUDWICK (P.) - Elemente der Technologischen Mechanik. - Springer Verlag, Berlin, 1909.
(2) - HOLLOMON (J.-H.) - Tensile Deformation. - Trans AIME, 162, p. 268-290, 1945.
(3)...