Thermal stability of electrical conductivity and mechanical properties of thin wires from aluminum alloys Al–0.25%Zr–(Si, Er, Hf, Nb)

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Аннотация

The thermal stability of thin wires made of aluminum alloys Al-0.25%Zr, additionally alloyed with Si, Er, Hf, Nb, was studied. Cast blanks were obtained by induction casting in vacuum; wire with a diameter of 0.3 mm was obtained by drawing with preliminary deformation treatment of the blanks. The effect of the annealing temperature on the mechanical properties and specific electric resistivity (SER) of aluminum wires has been studied. The microstructure of wires in the recrystallized state is investigated. It is shown that as the annealing temperature increases, there is a monotonous decrease in tensile strength, micro-hardness, and SER. It is established that the ductility of the wire does not monotonously (with a maximum) depend on the annealing temperature. Optimal annealing modes have been determined, providing the best combination of tensile strength, microhardness and SER of aluminum wire.

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Авторлар туралы

I. Shadrina

Lobachevsky State University of Nizhni Novgorod

Хат алмасуға жауапты Автор.
Email: yashadrina@nifti.unn.ru
Ресей, Nizhny Novgorod

A. Bobrov

Lobachevsky State University of Nizhni Novgorod

Email: yashadrina@nifti.unn.ru
Ресей, Nizhny Novgorod

A. Nokhrin

Lobachevsky State University of Nizhni Novgorod

Email: yashadrina@nifti.unn.ru
Ресей, Nizhny Novgorod

N. Berendeev

Lobachevsky State University of Nizhni Novgorod

Email: yashadrina@nifti.unn.ru
Ресей, Nizhny Novgorod

V. Kopylov

Lobachevsky State University of Nizhni Novgorod

Email: yashadrina@nifti.unn.ru
Ресей, Nizhny Novgorod

V. Chuvildeev

Lobachevsky State University of Nizhni Novgorod

Email: yashadrina@nifti.unn.ru
Ресей, Nizhny Novgorod

N. Tabachkova

National Research Technological University MISiS; A.M. Prokhorov Institute of General Physics of the Russian Academy of Sciences

Email: yashadrina@nifti.unn.ru
Ресей, Moscow; Moscow

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1. JATS XML
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2. Fig. 1. Tensile diagrams of wire samples No. 1 (a) and No. 5 (b).

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3. Fig. 2. Fractographic analysis of wire fractures in the initial state. The numbers in the figures correspond to the alloy numbers in Table 1. SEM.

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4. Fig. 3. Dependences of Hv (a), σв (b), ρ (c) on the temperature of 30-minute annealing of aluminum wires.

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5. Fig. 4. Al3Zr particles in wires made of alloy No. 2 (a) and No. 5 (b) after annealing at 300°C. TEM.

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6. Fig. 5. SEM images of the microstructure of wire No. 2 (a) and No. 5 (b) after annealing at 500°C (30 min). SEM.

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7. Fig. 6. Fractographic analysis of fractures of wire samples No. 1 and No. 5 after heat treatment (30 min) at different temperatures. SEM.

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8. Fig. 7. Dependence of the tensile strength on the microhardness of the studied aluminum wires.

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9. Fig. 8. Diagram “Electroelectric resistance (ρ) – ultimate strength (σв)” for wires (shaded markers) and blanks (light markers).

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10. Fig. 9. Diagram “microhardness – resistivity” for wires (light markers) and blanks (filled markers) made of alloys No. 1, 2 and 3.

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