Investigation the structure in cast and deformed states of aluminum alloy, economically alloyed with scandium and zirconium

Yuryev, Pavel Olegovich; Баранов, В. Н.; Orelkina, Tamara Aleksandrovna; Bezrukikh, A. I.; Voroshilov, Denis Sergeevich; Murashkin, M. Yu.; Partyko, E. G.; Константинов, И. Л.; Yanov, V. V.; Stepanenko, N. A.

doi:10.1007/s00170-021-07206-z

Cited by 15 publications

(6 citation statements)

References 46 publications

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“…It is worth noting that a similar mechanism was also observed in aluminum-magnesium alloys as well as other alloys that contain magnesium [39,40].…”

Section: Discussionsupporting

confidence: 58%

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

et al. 2022

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Based on the results achieved in systematic studies of structure formation and the formation of multicomponent phases, a scandium-containing filler metal from system alloy Mg-Zr-Nd for welding of aircraft casting was developed. The influence of scandium in magnesium filler alloy on its mechanical and special properties, such as long-term strength at elevated temperatures, was studied by the authors. It is established that modification of the magnesium alloy with scandium in an amount between 0.05 and 0.07% allows a fine-grained structure to be obtained, which increases its plasticity up to 70% and heat resistance up to 1.8 times due to the formation of complex intermetallic phases and the microalloying of the solid solution. Welding of the aircraft castings made of magnesium alloy with scandium-containing filler material allows obtaining a weld with a dense homogeneous fusion zone and the surrounding area without any defects. The developed filler material for welding surface defects (cracks, chips, etc.) formed during operation on aircraft engine bodies makes it possible to restore cast body parts and reuse them. The proposed filler material composition with an improved set of properties for the welding of body castings from Mg-Zr-Nd system alloy for aircraft engines makes it possible to increase their reliability and durability in general, extend the service life of aircraft engines, and obtain a significant economic effect.

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“…It is worth noting that a similar mechanism was also observed in aluminum-magnesium alloys as well as other alloys that contain magnesium [39,40].…”

Section: Discussionsupporting

confidence: 58%

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

et al. 2022

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“…Then the decomposition of the solid solution during subsequent heat treatment proceeds with the release of complex dispersed crystals of intermetallic phases of the Al 3 (Sc, Zr) type, which, like the Al 3 Sc phase, improve the physical and mechanical properties of the alloy [9, 11, 20, 23, 27-30, 35, 38-40, 42, 43, 47-50]. Therefore, in order to ensure the maximum content of scandium and zirconium in a supersaturated solid solution when casting large-sized ingots from aluminum-magnesium alloys, high crystallization rates of the melt should be used in order to exclude the formation of primary aluminides of scandium and zirconium during crystallization and cooling of the ingot [11,20,24,46,[48][49][50][51].…”

Section: Resultsmentioning

confidence: 99%

Modeling of casting technology of large-sized ingots from deformable aluminum alloys

Bezrukikh

Баранов

Константинов

et al. 2022

Int J Adv Manuf Technol

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Industrial technology has been developed for the semi-continuous casting of large-sized ingots from deformable aluminum alloys through the use of complex modeling, including computer modeling and physical modeling. The ProCAST and ANSYS software packages equipped with the FLUENT module were used for computer modeling. The physical modeling was carried out on a laboratory semi-continuous casting unit (SCCU), which represents a tenfold reduced physical model of an industrial casting unit for the vertical semi-continuous casting of ingots from aluminum alloys. An aluminum-magnesium alloy with the addition of 0.05% (wt.) of scandium was used as the object of modeling. The results of computer modeling were tested at the SCCU, and then computer modeling was carried out for casting a large ingot. According to the modes obtained in the simulation, an ingot with a section of 1310×560 mm was cast under industrial conditions, which had a good surface quality with the absence of casting defects. In the microstructure of an industrial ingot and an ingot cast on the SCCU, there were no primary intermetallic compounds Al 3 (Sc, Zr), which makes it possible to strengthen the alloy upon annealing. To check the manufacturability during rolling, billets with a size of 40×120×170 mm were cut from these ingots, which were hot-rolled to a thickness of 5 mm, and then cold rolled to a thickness of 1 mm. The rolling results revealed good workability of the alloy, which was re ected in the high quality of the surface and the absence of cracks at the edges of the rolled stock. The mechanical properties of sheets obtained from both ingots were at the same level, which proves the reliability of casting modes for ingots obtained by complex modeling and the validity of their use for industrial conditions of the semi-continuous casting of large ingots from aluminum alloys.

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“…Along the boundaries of the cells, inclusions of the nonequilibrium phase β(Al 8 Mg 5 ), the Mg 2 Si phase, and a large number of phases containing iron Al 6 (Fe, Mn) and Al 15 (Fe, Mn) 3 Si 2 were also found. In this case, the structure of the ingots did not contain inclusions of primary intermetallic compounds Al 3 (Sc, Zr) [47]. Consequently, scandium and zirconium in the alloy were only in a supersaturated solid solution and the cooling mode during casting was chosen correctly.…”

Section: Resultsmentioning

confidence: 99%

“…To test the operation of the SCCU a new Russian alloy 1580 of the Al-Mg system was used with the addition of scandium, which was studied in [27,28,[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. The mechanical properties of the obtained deformed seminished products were studied in [27,[39][40][41][42][43][44][45][46][47][48]. Also, computer simulation was carried out to study the modes of rolling of a new alloy [36][37][38][39].…”

Section: Methods Of Carrying Out Researchmentioning

confidence: 99%

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Physical Modeling of Semi-continuous Casting for Developing an Industrial Technology of Producing Ingots From New Deformable Aluminum Alloys

Bezrukikh

Баранов

Константинов

et al. 2021

Preprint

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A physical model of a semi-continuous casting unit (SCCU) has been manufactured and tested, designed to develop a technology for casting flat and cylindrical ingots from experimental aluminum alloys for subsequent metal forming. The SCCU includes two induction melting furnaces with a tilting mechanism, a rotary mixer, a metal path system, a vertical casting machine, a jib crane, water supply, power supply, monitoring and control systems. SCCU testing was carried out on six heats of alloy 1580 of the Al-Mg system with the addition of scandium. In the first three ingots the scandium content was 0.05% (wt.). In the second series of three heats ingots with 0.075% (wt.) scandium were cast. The ingots had a high surface quality, did not have casting defects, and there were no inclusions of primary intermetallic compounds Al3(Sc, Zr) in the structure of the ingots. The bottom and runner parts of the ingots were cut off, all faces were milled and subjected to homogenization annealing in a two-stage mode: the first heating at 350 °C, 3 h, the second heating for 1 h to 425 °C, 4 h. Then the billets were hot rolled from 40 to 5 mm, annealed at 380 °C, 1 h, rolled at room temperature to a thickness of 1 mm and annealed at 350 °C, 3 h. After that, tensile mechanical properties were tested. The results of modeling ingot casting were tested in industrial conditions when casting a large ingot with a cross section of 2100×500 mm. A template was cut from the ingot with the dimensions of a billet for rolling, as that obtained from an experimental ingot cast at the SCCU. The billet was subjected to hot and cold rolling according to the conditions used for rolling the experimental ingot. At the same time the modes of heat treatment of sheet semi-finished products were also repeated. The mechanical properties of sheets of alloy 1580 rolled from experimental and industrial ingots practically did not differ. This proves the reliability of casting modes for ingots obtained at the SCCU and tested for casting industrial ingots.

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Investigation the structure in cast and deformed states of aluminum alloy, economically alloyed with scandium and zirconium

Cited by 15 publications

References 46 publications

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

Modeling of casting technology of large-sized ingots from deformable aluminum alloys

Physical Modeling of Semi-continuous Casting for Developing an Industrial Technology of Producing Ingots From New Deformable Aluminum Alloys

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