Influence of deformation and annealing on the structure, electrical resistance and hardness of the Al–4 %Cu–3 %Mn alloy casted in an electromagnetic crystallizer

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Дәйексөз келтіру

Толық мәтін

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Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

Using computational and experimental methods, the influence of deformation-heat treatment on the structure, electrical resistance and hardness of the Al–4 %Cu–3 %Mn alloy produced by casting in an electromagnetic crystallizer was studied. It has been shown that at a cooling rate of more than 1000 K/s, the entire amount of manganese and half of the total copper content are dissolved in the aluminum solid solution, which allows, with subsequent deformation-thermal treatment, to form a structure with the maximum possible number of Al20Cu2Mn3 dispersoids, which allows achieving significant increasing heat resistance compared to known alloys of the Al–Cu–Mn system.

Толық мәтін

Рұқсат жабық

Авторлар туралы

N. Belov

National Research Technological University MISiS

Email: ch3rkasov@gmail.com

кафедра обработки металлов давлением

Ресей, Moscow, 119047

S. Cherkasov

National Research Technological University MISiS

Хат алмасуға жауапты Автор.
Email: ch3rkasov@gmail.com

кафедра обработки металлов давлением

Ресей, Moscow, 119047

N. Korotkova

National Research Technological University MISiS

Email: ch3rkasov@gmail.com

кафедра обработки металлов давлением

Ресей, Moscow, 119047

M. Motkov

Siberian Federal University

Email: ch3rkasov@gmail.com

кафедра электротехники

Ресей, Krasnoyarsk, 660041

Әдебиет тізімі

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Әрекет
1. JATS XML
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2. Fig. 1. Initial bar blanks (a) and cold-rolled alloy strips (b).

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3. Fig. 2. Calculated isothermal sections of the Al–Cu–Mn system at 350 °C (a) and 425 °C (b) and curves of nonequilibrium crystallization according to the Sheil-Gulliver model (dependence of the total fraction of solid phases Q on temperature) (c – all phases are included in the calculation, d – Mn-containing phases are excluded).

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4. Fig. 3. The structure of the cast billet (a, b) and cold-rolled tape (c, d) obtained from the cast EMC billet according to the 425S mode (see Table 2).

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5. Fig. 4. The structure of the cast billet (a, d), cold–rolled strips 350S (b, e) and 425S (c, e) after annealing at 450 °C (a–c) and 550 °C (d-e).

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6. Fig. 5. The effect of the annealing temperature on the electrical resistivity (a) and hardness (b) of the cast workpiece and cold-rolled strips.

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7. Fig. 6. Comparison of the calculated and experimental dependences of the electrical resistivity of cold-rolled strips on the annealing temperature.

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8. Fig. 7. The effect of the annealing duration at 350 °C on the electrical resistivity (a) and hardness (b) of the cold-rolled strip.

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