Author:
Nokhrin A V,Shadrina I S,Chuvil’deev V N,Bobrov A A,Kopylov V I,Berendeev N N,Piskunov A V
Abstract
Abstract
Thermal stability of the structure and mechanical properties of composite wires made of microalloyed aluminum alloys were studied. The wire was produced by co-rolling of the copper-coated aluminum alloy. It has been demonstrated that annealing at 200 °C for 200 hours leads to the onset of recrystallization, reduced hardness and strength of the wire as per the Hall-Petch equation. The grain size in the annealed wire was less than 1 -2 μm, manifesting the stabilized effect of precipitates of Al3(Sc,Zr) phases. At that the rate of diffusion of copper into the aluminum was quite low. The formation of a uniform fine-grained structure and zero copper-induced embrittlement resulted in increased by up to ∼10% plasticity of the wire.
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