Effect of Grain Size on Cryogenic Mechanical Properties of an Al-Mg-Sc Alloy

Kaibyshev, Rustam

doi:10.4028/www.scientific.net/amr.922.862

Cited by 19 publications

(10 citation statements)

References 10 publications

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“…The most effective approach in solving the task of increasing the technological strength of welded joints of cast parts made of magnesium alloys is the development of new additive scandium-containing materials with an increased level of mechanical properties and heat resistance, which provide a decrease in the level of residual stresses and the prevention of cracking [29]. The positive effect of scandium is provided on the one hand by the formation of complexly alloyed intermetallic phases, which are additional crystallization centers and refine the grain.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

et al. 2022

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“…Алюминий-магниевые сплавы относятся к термически неупрочняемым деформируемым сплавам. Однако в российских сплавах 1570 и 1580 этой системы добавками скандия обеспечивают повышение прочностных показателей по сравнению с обычными магналиями [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Так, авторами [15] показано, что использование в конструкциях заготовок из сплава 1570 вместо сплава АМг6 позволяет снизить массу изделия более чем на 50 %.…”

Section: Introductionunclassified

Influence of rolling and annealing modes on properties of semi-finished sheet products made of aluminum deformable alloy 1580

Константинов

Баранов

Sidelnikov

et al. 2020

Izv.VUZ. Tsvet. Met.

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Аннотация: Проведено исследование технологичности и свойств листового проката, полученного из крупногабаритного слитка сплава 1580 с пониженным содержанием скандия в пределах его марки. Выполнена оценка технологичности обработки слитка при горячей и холодной прокатках, изучено влияние степени деформации и режимов отжига на свойства холоднокатаных полуфабрикатов из указанного сплава. В качестве объекта исследований выбран крупногабаритный слиток сечением 500 × 2100 мм из сплава 1580 с содержанием скандия 0,067 мас.%, полученный в промышленных условиях. Методика проведения работы включала несколько этапов прокатки и термообработки листовых полуфабрикатов на различных стадиях разработанного режима деформации металла и испытания механических свойств образцов из них на универсальной машине LFM 400 kN. Для выполнения исследований из слитка вырезали темплет размером 60 × 500 × 900 мм, а из него получали заготовки под прокатку размерами 50 ×180 × 300 мм, которые подвергали гомогенизационному отжигу по двухступенчатому режиму, разработанному ранее для данного сплава. В результате горячей прокатки отожженных заготовок при температуре их нагрева 450 °С и суммарном относительном обжатии ε  = 84÷90 % получали листовые полуфабрикаты толщиной 5-8 мм. Далее, после их отжига при t = = 320 °С в течение 6 ч, с помощью холодной прокатки изготавливали тонколистовые полуфабрикаты толщиной от 2 до 6 мм. Выполнен анализ их механических свойств в деформированном и отожженном состояниях, который показал, что накопление суммарной степени деформации при холодной прокатке до ε Σ = 38 % обеспечивает у сплава 1580 рост прочностных свойств до σ 0,2 = 380 МПа, а после этого интенсивность роста замедляется и при ε Σ = 60 % наблюдали σ 0,2 = 400 МПа. Проведено также исследование влияния отжига при t = 250÷350 °С на механические свойства листового проката. Установлено, что он приводит к снижению прочностных показателей и повышению пластичности, а максимальные значения условного предела текучести соответствуют температурам отжига 250-275 °С при достаточно высокой пластичности. В результате исследований установлено, что по прочностным свойствам листовой прокат из сплава 1580 с пониженным содержанием скандия превосходит полуфабрикаты из аналогичного по химическому составу, но без добавки скандия, сплава AW-5083 (США) на 10-15 %, а превышение по пластическим свойствам составляет 40-60 %.

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“…An effective modifier of the cast grain structure of aluminum alloys is scandium, which makes it possible to obtain ingots by the method of continuous casting, which have a non-dendrite structure. In this connection, magnanes doped with scandium are considered to be the most promising alloys capable of providing the above complex of properties [3][4][5][6][7][8][9][10][11][12][13][14][15]. From the alloys used in industrial production, it is possible to identify alloy 01570, in which the scandium content reaches 0.35% [3,4].…”

Section: Introductionmentioning

confidence: 99%

Study on the influence of heat treatment modes on mechanical and corrosion properties of rolled sheet products from a new aluminum alloy, economically alloyed with scandium

Zenkin

Баранов

Sidelnikov

et al. 2019

VNMSTU

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The paper presents the study on mechanical and corrosion properties of rolled sheet products from a new alloy of the Al-Mg-Sc system in a deformed and heat treated state. Its use and development of technologies for the production of relevant parts for automobile and shipbuilding industries are important today due to the tasks of downstream aluminum processing, which are solved by RUSAL, and confirmed by the state support of a comprehensive project aimed at creating a high-technology production division, being currently carried out by the Bratsk Aluminium Smelter and Siberian Federal University. To determine mechanical and corrosion properties, the authors used sheets and coils rolled on industrial reversing hot rolling mill Quarto 2800. The tensile test was used to study deformed samples after rolling and samples produced in five heat treatment modes with varying heating temperatures of 300, 350 and 380°C and a soaking time of 1 and 3 hours. The studies on samples of rolled products with various thicknesses showed that as compared to the initial state, steel strength properties after heat treatment decrease by 12–20% on average, and ductility properties (δ) increase by 50–65%. In this case, heat treatment modes 1–3 give a fairly good ratio of strength and ductility properties. The level of these properties is comparable to the properties of alloy 01570. It is noted that a trend in a decrease in strength properties and a growth of ductile properties with increasing heat treatment temperature is also observed for samples of rolled products produced by various methods of cold rolling (cut-to-length sheets and in coils). If sheet thickness is similar, strength properties are higher, when sheets are cut-to-length rather than in coils. The corrosion tests of sheets with different thicknesses showed that the heat treatment modes under study do not have a significant influence on alloy resistance to intergranular corrosion.

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Effect of Grain Size on Cryogenic Mechanical Properties of an Al-Mg-Sc Alloy

Cited by 19 publications

References 10 publications

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

Influence of rolling and annealing modes on properties of semi-finished sheet products made of aluminum deformable alloy 1580

Study on the influence of heat treatment modes on mechanical and corrosion properties of rolled sheet products from a new aluminum alloy, economically alloyed with scandium

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