Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.3390/met11020236

Ключевые слова: aluminum&#8211, zirconium wire alloys, electromagnetic casting (emc), drawing, electrical conductivity (ec), phase composition, nanoparticles

Аннотация: Experimental aluminum alloy containing 0.8% Ca, 0.5% Zr, 0.5% Fe and 0.25% Si (wt.%), in the form of a long-length rod 12 mm in diameter was manufactured using an electromagnetic casting (EMC) technique. The extremely high cooling rate during alloy solidification (approximate to 10(4) K/s) caused the formation of a favorable microstructure in the ingot characterized by a small size of the dendritic cells, fine eutectic particles of Ca-containing phases and full dissolution of Zr in Al the solid solution. Due to the microstructure obtained the ingots possess high manufacturability during cold forming (both drawing and rolling). Analysis of the electrical conductivity (EC) and microhardness of the cold rolled strip and cold drawn wire revealed that their temperature dependences are very close. The best combination of hardness and EC in the cold rolled strip was reached after annealing at 450 degrees C. TEM study of structure evolution revealed that the annealing mode used leads to the formation of L1(2) type Al3Zr phase precipitates with an average diameter of 10 nm and a high number density. Experimental wire alloy has the best combination of ultimate tensile strength (UTS), electrical conductivity (EC) (200 MPa and 54.8% IACS, respectively) and thermal stability (up to 450 degrees C) as compared with alloys based on the Al-Zr and Al- rare-earth metal (REM) systems. In addition, it is shown that the presence of calcium in the model alloy increases the electrical conductivity after cold forming operations (both drawing and rolling).

Журнал: METALS

Выпуск журнала: Vol. 11, Is. 2

Номера страниц: 236

ISSN журнала: 20754701

Место издания: BASEL

Издатель: MDPI

• Belov Nikolay (Natl Univ Sci & Technol MISiS, Dept Met Forming, Leninsky Prospekt 4, Moscow 119049, Russia)
• Akopyan Torgom (Natl Univ Sci & Technol MISiS, Dept Met Forming, Leninsky Prospekt 4, Moscow 119049, Russia)
• Korotkova Natalia (Natl Univ Sci & Technol MISiS, Dept Met Forming, Leninsky Prospekt 4, Moscow 119049, Russia)
• Murashkin Maxim (Ufa State Aviat Tech Univ, Inst Phys Adv Mat, K Marx 12, Ufa 450008, Russia; St Petersburg State Univ, Lab Mech Bulk Nanostruct Mat, Univ Skaya Nab 7-9, St Petersburg 199034, Russia)
• Timofeev Victor (Siberian Fed Univ, Dept Elect Engn, 79 Svobodnyy Prospekt, Krasnoyarsk 660041, Russia)
• Fortuna Anastasiya (Natl Univ Sci & Technol MISiS, Dept Phys Mat Sci, Leninsky Prospekt 4, Moscow 119049, Russia)

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