Analysis of Crystallization Process of Intensive Cooled AlSi20CuNiCoMg Alloy

Władysiak, R.; Kozuń, A.; Dębowska, Karolina; Pacyniak, T.

doi:10.1515/afe-2017-0065

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…Thermal and derivative analysis is a universal method of studying the solidification of alloys. So far, it has been successfully used to study alloys: iron [34], aluminum [35,36], copper [37], magnesium [38], or cobalt [39]. The alloy temperature at the time of pouring the probe was~1000 • C.…”

Section: Methodsmentioning

confidence: 99%

Microstructural Characteristics of AlSi9Cu3(Fe) Alloy with High Melting Point Elements

Szymczak

Gumienny

Klimek

et al. 2020

Metals

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The paper presents the results of microstructure tests of EN AC-46000 hypoeutectic Al–Si alloy with and without high-melting-point elements: chromium, molybdenum, vanadium, and tungsten. The above-mentioned elements were used individually or simultaneously in various combinations. The tested castings were made using two technologies: shell molding and high pressure die casting (HPDC). Using X-ray diffraction and microanalysis of the chemical composition an attempt to determine the phase structure of the tested alloy was made. It has been shown that the microstructure of the base alloy consists of dendrites of α(Al) solid solution and complex eutectic mixtures: ternary α(Al) + Al15(Fe,Mn)3Si2 + β(Si) and quaternary α(Al) + Al2Cu + AlSiCuFeMgMnNi + β(Si). High-melting point elements, regardless of the combination used, attach mainly to intermetallic phases rich in Fe and form the Al15(Fe,Mn,M)3Si2 phase, where M is any high melting point element or a combination of such elements. It has been shown that the area fraction of the above-mentioned phase increases with increasing content of high melting point elements. A greater area fraction of the Al15(Fe,Mn,M)3Si2 phase in the casting from the shell mold in relation to the high pressure die casting has been also found.

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Section: Methodsmentioning

confidence: 99%

Microstructural Characteristics of AlSi9Cu3(Fe) Alloy with High Melting Point Elements

Szymczak

Gumienny

Klimek

et al. 2020

Metals

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“…The cooling rate was determined using the relation (see Eq. 1) derived by Vazquez-Lopez et al [11], where SDAS is the secondary dendrite arm spacing, and R is the cooling rate.…”

Section: B)mentioning

confidence: 99%

Residual Stress Analysis of A362 Aluminum Alloy Gear Case Using Neutron Diffraction

Sediako

Stroh

McDougall

et al. 2018

MSF

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Mercury Marine has used a new alloy, Mercalloy A362, for the manufacturing of a re-designed lower unit transmission gearcase. The enhanced strength of the alloy allowed for a substantial weight reduction in the new design. The purpose of this study was to examine and determine why cracking may develop in the gear casing during in service testing. Two types of material states, (i) as cast and (ii) heat treated were compared. Metallography and neutron diffraction analysis was carried out at locations identified as being areas of high stress by Magma software – which was performed in a separate study. Microstructural characterization at these locations revealed microstructural and the compositional differences. Differences in the porosity, eutectic phase, and volume fraction of the precipitates were observed at various locations of interest in each material state. The residual stress analysis was performed with application of neutron diffraction and revealed that the stresses in the as-cast component reached a maximum value of 120 MPa, which is below the yield strength of the alloy. The heat treatment applied to the castings reduced the stress by approximately 50 MPa. Based on the microstructure and neutron diffraction results, it is likely that performing a heat treatment process extends the lifetime of the component, however, it may not completely eliminate the cracking problem. Farther studies are currently nearing completion, targeting the mass production of the redesigned gearcase.

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“…Prică et al studied the Invar alloy via mechanical alloying and obtained the alloy powders with a constant lattice parameter value up to about 350 °C [ 9 ]. Wladysiak et al used a thermal imaging camera to analyze the solidification process of the multicomponent alloy and the effect of casting die cooling on the solidification process of the hypereutectic Al-Si alloy [ 10 , 11 ]. In addition, there are many other studies on Invar alloy’s application [ 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Rapid Solidification of Invar Alloy

He,

Yao,

et al. 2023

Materials

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The Invar alloy has excellent properties, such as a low coefficient of thermal expansion, but there are few reports about the rapid solidification of this alloy. In this study, Invar alloy solidification at different undercooling (ΔT) was investigated via glass melt-flux techniques. The sample with the highest undercooling of ΔT = 231 K (recalescence height 140 K) was obtained. The thermal history curve, microstructure, hardness, grain number, and sample density of the alloy were analyzed. The results show that with the increase in solidification undercooling, the XRD peak of the sample shifted to the left, indicating that the lattice constant increased and the solid solubility increased. As the solidification of undercooling increases, the microstructure changes from large dendrites to small columnar grains and then to fine equiaxed grains. At the same time, the number of grains also increases with the increase in the undercooling. The hardness of the sample increases with increasing undercooling. If ΔT ≥ 181 K (128 K), the grain number and the hardness do not increase with undercooling.

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Analysis of Crystallization Process of Intensive Cooled AlSi20CuNiCoMg Alloy

Cited by 6 publications

References 10 publications

Microstructural Characteristics of AlSi9Cu3(Fe) Alloy with High Melting Point Elements

Microstructural Characteristics of AlSi9Cu3(Fe) Alloy with High Melting Point Elements

Residual Stress Analysis of A362 Aluminum Alloy Gear Case Using Neutron Diffraction

Rapid Solidification of Invar Alloy

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