Microstructure evolution
Hardening of aluminum alloys
Article REF: M230 V1
Microstructure evolution
Hardening of aluminum alloys

Authors : Bruno CHENAL, Julian DRIVER

Publication date: June 10, 1999 | Lire en français

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3. Microstructure evolution

3.1 Cold forming

The early stages of deformation give rise to rapid multiplication of dislocations in each sliding system (stage I, ε < 0.05), as well as interactions of dislocations from different systems (forest interactions or stage II). Similarly, dislocations interact with grain boundary obstacles, resulting in hardening as a function of grain size (d ) according to Hall-Petch's law: σ(d)=σ∞+k3d

with :

σ...
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