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Multifunctional properties of composition graded Al wires

Abstract : The potentiality of composition graded AlMgSi wires for optimized combination of electrical conductivity and torsion strength has been investigated. Composition graded wires were obtained by co-drawing commercially pure Al with an AlMgSi alloy followed by diffusion annealing. Diffusion gradients and local hardening response to precipitation treatments were evaluated thanks to nano-indentation measurements. Resulting microstructures with spatial gradients of nanoscaled precipitates were characterized by transmission electron microscopy. Finally, it is shown that such graded structures give rise to an improved combination of electrical conductivity and mechanical strength in torsion as compared to the predictions based on a classical rule of mixture.
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Cui Yang, Nicolas Masquellier, Camille Gandiolle, Xavier Sauvage. Multifunctional properties of composition graded Al wires. Scripta Materialia, Elsevier, 2020, 189, pp.21-24. ⟨10.1016/j.scriptamat.2020.07.052⟩. ⟨hal-02917440⟩

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