Journal articles: 'Al-Si Alloys'

1

Kitaoka, Sanji. "Al–Si alloys." Journal of Japan Institute of Light Metals 61, no. 9 (September 30, 2011): 485–503. http://dx.doi.org/10.2464/jilm.61.485.

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Srivastava, A. K., and S. Ranganathan. "Microstructural characterization of rapidly solidified Al–Fe–Si, Al–V–Si, and Al–Fe–V–Si alloys." Journal of Materials Research 16, no. 7 (July 2001): 2103–17. http://dx.doi.org/10.1557/jmr.2001.0287.

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The present study of rapidly solidified melt-spun Al80Fe14Si6 Al80V14Si6, and Al80Fe10V4Si6 alloys by electron microscopy techniques, x-ray diffractometry, and differential scanning calorimetry leads to a number of microstructural results. Coexistence of a micro-quasicrystalline state of an icosahedral phase with monoclinic θ–Al13Fe4 and hexagonal β–Al6V in Al–Fe–Si and Al–V–Si alloys, respectively, is reported. Also, the growth morphology of the icosahedral phase surrounded by a crystalline ring was investigated in an Al–Fe–V–Si alloy. The crystalline ring has the particles of the cubic α–Al12(Fe,V)3Si silicide phase. Evidence of irrational twinning of cubic crystals, giving rise to a symmetry not deviating much from icosahedral symmetry was found in this alloy. In all the three alloys crystalline intermetallics were elucidated in the context of rational approximants of an icosahedral quasicrystal. It was noticed that while the icosahedral phase in Al–Fe–Si and Al–V–Si alloys transforms to crystalline intermetallics at about the same temperature (approximately 610 K), the transformation of icosahedral phase in Al–Fe–V–Si alloy occurred at a relatively lower temperature (540 K). The origin of different metastable microstructures and their stability at elevated temperatures, in these alloys, are compared and discussed.

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3

Ohori, Koichi. "Al–Mg–Si alloys." Journal of Japan Institute of Light Metals 61, no. 12 (December 30, 2011): 743–57. http://dx.doi.org/10.2464/jilm.61.743.

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Bonnet, M., J. Rogez, and R. Castanet. "EMF investigation of Al-Si, Al-Fe-Si and Al-Ni-Si liquid alloys." Thermochimica Acta 155 (December 1989): 39–56. http://dx.doi.org/10.1016/0040-6031(89)87134-5.

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Mohan, Sunil, Vijaya Agarwala, and Subrata Ray. "Hypereutectic Al-Si Rheocast Alloys / Übereutektische Al-Si-Rheocast-Legierungen." International Journal of Materials Research 79, no. 6 (June 1, 1988): 403–6. http://dx.doi.org/10.1515/ijmr-1988-790607.

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Mohan, Sunil, Vijaya Agarwala, and Subrata Ray. "Hypereutectic Al-Si Rheocast Alloys / Übereutektische Al-Si-Rheocast-Legierungen." International Journal of Materials Research 79, no. 6 (June 1, 1988): 407–9. http://dx.doi.org/10.1515/ijmr-1988-790608.

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7

Wang, Xiaoguo, Jian Qin, Hiromi Nagaumi, Ruirui Wu, and Qiushu Li. "The Effect of α-Al(MnCr)Si Dispersoids on Activation Energy and Workability of Al-Mg-Si-Cu Alloys during Hot Deformation." Advances in Materials Science and Engineering 2020 (May 20, 2020): 1–12. http://dx.doi.org/10.1155/2020/3471410.

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The hot deformation behaviors of homogenized direct-chill (DC) casting 6061 aluminum alloys and Mn/Cr-containing aluminum alloys denoted as WQ1 were studied systematically by uniaxial compression tests at various deformation temperatures and strain rates. Hot deformation behavior of WQ1 alloy was remarkably changed compared to that of 6061 alloy with the presence of α-Al(MnCr)Si dispersoids. The hyperbolic-sine constitutive equation was employed to determine the materials constants and activation energies of both studied alloys. The evolution of the activation energies of two alloys was investigated on a revised Sellars’ constitutive equation. The processing maps and activation energy maps of both alloys were also constructed to reveal deformation stable domains and optimize deformation parameters, respectively. Under the influence of α dispersoids, WQ1 alloy presented a higher activation energy, around 40 kJ/mol greater than 6061 alloy’s at the same deformation conditions. Dynamic recrystallization (DRX) is main dynamic softening mechanism in safe processing domain of 6061 alloy, while dynamic recovery (DRV) was main dynamic softening mechanism in WQ1 alloy due to pinning effect of α-Al(MnCr)Si dispersoids. α dispersoids can not only resist DRX but also increase power required for deformation of WQ1 alloy. The microstructure analysis revealed that the flow instability was attributed to the void formation and intermetallic cracking during hot deformation of both alloys.

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Daswa, Pfarelo, Heinrich Moller, and Gonasagren Govender. "Overageing Characteristics of Alloy A356 and Al-Mg-Si Casting Alloys." Solid State Phenomena 285 (January 2019): 75–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.75.

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Al-Si-Mg casting alloys, such as Al-7Si-0.3Mg alloy A356, are heat treatable and can be precipitation hardened to the T6 temper condition. However, Al-Mg-Si casting alloys (5xx series) are generally not considered to be heat treatable. These 5xx series castings are known for good castability and good resistance to corrosion, especially in marine environments. This paper investigates the extent to which 5xx series alloys could possibly be artificially aged. The influences of artificial ageing time on the overageing characteristics of both Al-Mg-Si and A356 casting alloys have been studied. A356 aluminium alloy castings were produced using the CSIR rheo-high pressure die casting process (R-HPDC). Al-Mg-Si alloys were cast using permanent mould casting. The rate of overageing of these alloys is of importance for potential higher temperature applications. The overageing characteristics of Al-Mg-Si and A356 aluminium alloys have been investigated at an artificial ageing temperature of 190°C for ageing times up to 128 hours. It is shown that the rate of overageing of Al-Mg-Si casting alloys is lower than for alloy A356. This could possibly result in the use of these alloys in applications at temperatures that are higher than where alloy A356 can be employed. It also allows the possibility of using the 5xx series alloys as an alternative to other Al-alloys for R-HPDC applications.

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Novák, Pavel, Jan Kříž, Alena Michalcová, and Dalibor Vojtěch. "Microstructure Evolution of Fe-Al-Si and Ti-Al-Si Alloys during High-Temperature Oxidation." Materials Science Forum 782 (April 2014): 353–58. http://dx.doi.org/10.4028/www.scientific.net/msf.782.353.

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Alloys based on TiAl and FeAl aluminides are modern materials for high-temperature applications in automotive or aerospace industry due to low density combined with good high-temperature mechanical properties and oxidation resistance. Previous works proved that the addition of silicon to these alloys improves the oxidation resistance as well as the thermal stability. In this work, the mechanism of the silicon effect was investigated by observing the microstructure of the oxide layer and the near-surface area of the Ti-Al-Si and Fe-Al-Si alloys prepared by reactive sintering powder metallurgy. It was found that silicon improves the compactness of the oxide layers. The oxide layers on Fe-Al-Si alloys are formed by Al2O3 and small amount of iron oxide (Fe2O3) while Ti-Al-Si alloys cover by TiO2 and Al2O3 during the oxidation. Due to aluminium depletion of the alloy, a layer of silicides is formed under the oxide layer, thus acting as the additional protection against high-temperature oxidation.

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Liu, Meng, Qianning Guo, Xingpu Zhang, Manuel Wüstenhagen, Jakub Čížek, and John Banhart. "Clustering phenomena in quenched Al, Al–Mg, Al–Si and Al–Mg–Si alloys." Scripta Materialia 177 (March 2020): 203–7. http://dx.doi.org/10.1016/j.scriptamat.2019.10.034.

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11

Lasagni, Fernando, Myriam Dumont, Côme Salamida, Jorge Antonio Acuña, and H. Peter Degischer. "Dilatometry revealing Si precipitation in Al–Si-alloys." International Journal of Materials Research 100, no. 7 (July 2009): 1005–13. http://dx.doi.org/10.3139/146.110145.

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Zuo, Min, Xiangfa Liu, Hongshang Dai, and Xiangjun Liu. "Al-Si-P master alloy and its modification and refinement performance on Al-Si alloys." Rare Metals 28, no. 4 (July 24, 2009): 412–17. http://dx.doi.org/10.1007/s12598-009-0080-9.

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13

Samavedam, S., and S. Sundarrajan. "Al-Si and Al-Si-Mg Cast Alloys Shrinkage Porosity Estimation." Archives of Foundry Engineering 16, no. 1 (March 1, 2016): 61–68. http://dx.doi.org/10.1515/afe-2016-0004.

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Abstract US A356 and US 413 cast aluminium alloys shrinkage characteristic have been discussed in the present study. Specific volume reduction leads to shrinkage in castings and it can be envisaged as a casting defect. Finite difference based casting process simulation software has been used to study the shrinkage characteristic and it is quantified using mathematical formulae. The three dimensional model of the shrinkage defect has been constructed using CAD application software. Shrinkage characteristic has also been quantified through experimental validation studies and compared well with casting process simulation. Shrinkage characteristic study and control is essential for producing defect free castings. Influence of casting shape on the shrinkage characteristic has been studied in this paper.

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14

Abbady, Mohamed. "ABRASIVE WEAR OF Al-Mg and Al-Mg2 Si-Si ALLOYS." International Conference on Aerospace Sciences and Aviation Technology 7, ASAT CONFERENCE (May 1, 1997): 1–9. http://dx.doi.org/10.21608/asat.1997.25421.

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15

Dybowski, Bartłomiej, Łukasz Poloczek, and Andrzej Kiełbus. "The Porosity Description in Hypoeutectic Al-Si Alloys." Key Engineering Materials 682 (February 2016): 83–90. http://dx.doi.org/10.4028/www.scientific.net/kem.682.83.

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Al-Si alloys are the most important group among aluminum casting alloys. They are widely used in automotive and aerospace industries. Chemical modification of the Al-Si alloys leads to formation of fine, fibrous Al-Si eutectic mixture ensuring high mechanical properties. The modification is however known to increase the alloy porosity, which may, in turn, result in decrease of its properties. The following paper presents results of the research on quantitative description of the Al-Si cast alloys porosity and influence of Na modification on the porosity of AlSi9Mg alloy. Porosity in the hypoeutectic Al-Si alloys occurs in four types: shrinkage cavities, shrinkage porosity, isolated gas pores and gas pores surrounded by shrinkage porosity. Na modification leads to increase of shrinkage pores volume fraction.

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Achiţei, Dragoş Cristian, Petrică Vizureanu, Mirabela Georgiana Minciună, Mohd Mustafa Al Bakri Abdullah, and Ioan Gabriel Sandu. "Study on Al-Si Alloys Properties Enhancement." Applied Mechanics and Materials 754-755 (April 2015): 634–38. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.634.

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The paper presents a study about aluminum alloy, allied with Si, Cu, Mn, Mg. The Al-Si-Cu-Mg alloys for foundry are used for parts strongly required and which work at high temperatures, due to their good wear resistance. The industrial Al-Cu alloys contain 12 % cooper, are hipo-eutectic and may be for foundry or deformable. By alloying with magnesium, the Al-Cu alloys become with remarkable properties of resistance and plastic deformation processing. The improvement of mechanical characteristics for Al-Si alloys is realized with metals which forms the intermediate phases with silicon or aluminum, with variable solubility in solid state and which permits the structural hardening by heat treatments (quenching and ageing). From the analysis of dilatogramms, grouped for each sample, with the specific initial length, subjected to successive heating, from ambiance temperature up to 500°C, it is found that, with the appearance of ageing phenomena, on the samples aren’t significant modifications for elongation (few microns), only different may be the form of elongation-temperature curve. This analysis permits the determination of experimental data, regarding the behavior of Al-Si alloy subjected to heat treatments and repeated warming. Therefore, the Al-Si-Cu-Mg alloys, for foundry, are used for manufacture the parts strong required and which work at high temperatures, like pistons for engines with internal burn, parts for machines and reinforcements construction, due to their high usage resistance.

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17

Luo, Xiao Ping, Lan Ting Xia, and Ming Gang Zhang. "Study of Si/Al Ratio and Modification of Silicon Morphology in ZA27 Alloys." Advanced Materials Research 145 (October 2010): 298–301. http://dx.doi.org/10.4028/www.scientific.net/amr.145.298.

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Changes in the primary Si phase in Al-Si alloys were analyzed and compared to the Si phase in ZA27 alloys with the same Si/Al ratio. The Si phase in the Al-Si alloys was modified and applied to ZA27 alloys to refine the Si phase of the microstructure. The results showed that the change in the ZA27 alloys was the same as that in the Al-Si alloys while good modification effects were obtained with a 1.5% Cu-P inter-alloy using two different processes.

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18

Ibrahim, Mohamed, Mohamed Abdelaziz, Agnes Samuel, Herbert Doty, and Fawzy Samuel. "Spheroidization and Coarsening of Eutectic Si Particles in Al-Si-Based Alloys." Advances in Materials Science and Engineering 2021 (January 19, 2021): 1–16. http://dx.doi.org/10.1155/2021/6678280.

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The present study was carried out on three Al-Si cast alloys viz., 319, 356, and 413 alloys, solidified at 8°C/s. Samples from 319 and 413 alloys were solution heat-treated at 510°C, whereas samples from 356 alloy were solutionized at 550°C, for up to 1200 h. The results reveal that complete spheroidization of eutectic Si particles in terms of achieving individual spherical particles cannot be achieved in most Al-Si-Cu-Mg alloys even after a solutionizing time of 1200 h which contradicts with the existing theory. Addition of Sr to Cu-free 356 alloy could lead to complete spheroidization after 1200 h at 550°C if the alloy was solidified at 8°C/s. Besides the dissolution theory of Ostwald, coarsening of Si particles can as well take place by impingement, fusion, and agglomeration. Increasing the Si content makes it difficult to achieve spheroidization, i.e., fragmentation and coarsening. Results obtained from observations of deeply etched samples (3D) contradict those obtained from polished samples (2D).

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19

Tokuda, Momoko, Kenji Matsuda, Takeshi Nagai, Junya Nakamura, Tokimasa Kawabata, and Susumu Ikeno. "TEM Observation of Cu and Ag Addition Al-Mg-Si Alloys." Advanced Materials Research 409 (November 2011): 81–83. http://dx.doi.org/10.4028/www.scientific.net/amr.409.81.

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It has been known that Cu-and Ag-addition Al-1.0mass%Mg2Si alloys (Al-Mg-Si-Cu alloy and Al-Mg-Si-Ag alloy) have higher hardness and elongation than those of Al-1.0mass%Mg2Si alloy. In this study, the aging behaviour of Al-Mg-Si-Cu alloy, Al-Mg-Si-Ag alloy and (Cu+Ag)-addition Al-1.0 mass% Mg2Si alloy (Al –Mg –Si-Cu-Ag alloy) has been investigated by hardness test and TEM observation. The Al-Mg-Si-Cu-Ag alloy has the fastest age-hardening rate in the early aging period and the finest microstructure at the peak hardness among three alloys. Therefore the microstructure of the precipitate in Al–Mg–Si-Cu-Ag alloy has been investigated by HRTEM observation to understand the effect of Cu and Ag addition on aging precipitation.

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Krupiński, Mariusz, Mariusz Król, and Rafał Maniara. "Heat Treatment of Al-Si-Cu Alloys." Solid State Phenomena 275 (June 2018): 15–29. http://dx.doi.org/10.4028/www.scientific.net/ssp.275.15.

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The aim of the presented work is an effort to answer the research questions, i.e. how to determine the optimal supersaturation temperature for multicomponent alloys? What is the relationship between changes in the derivative curve of composites and the relationship between their chemical composition and microstructure? Searching for the right answer to the above questions was the basis for determining the scope and methodology of the presented work. To describe the phenomena that occur in the material during solidification under various conditions caused by the variable cooling rate and variable chemical composition it was decided to use thermal-derivative analysis methods. The mentioned method allows to accurately describe and interpret the kinetics of the crystallization of the tested materials. This method is often used in the search for new directions of modern technologies, attractive from both experimental and cognitive. This methodology allows to determine the relationship between crystallization kinetics and usable casting properties on the example of Al-Si-Cu alloys and other alloying elements.

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Wang, Shu Mei, Kenji Matsuda, Tokimasa Kawabata, and Susumu Ikeno. "Variation of Aging Behaviour for TM-Addition Al-Mg-Si Alloys." Advanced Materials Research 409 (November 2011): 88–91. http://dx.doi.org/10.4028/www.scientific.net/amr.409.88.

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The transition metals such as chromium and manganese are usually added to 6000 series Al-Mg-Si alloys to control recrystallization and grain size and thus the properties of alloys. In Cr/Mn-addition alloys, Cr or Mn will expense Si to form the dispersoids as AlMnSi or AlCrSi and tend to decrease its aging effect. The aim of this work is to investigate the effect of transition metals (TMs) addition on the hardness and the microstructural features of Al-Mg-Si alloys. Al-Mg-Si alloys, which can be remarked as the quasi-binary alloys of Al-Mg2Si, are prepared with Cr or Mn addition by laboratory casting. Some other transition metals, such as Co and Ni, are also added to Al-Mg-Si alloys. The grain size of four alloys decreases with TMs addition, which consequently increases the as-quenched hardness of the alloys comparing with that of the Al-Mg2Si alloy without TMs addition. The difference between Cr/Mn-addition alloy and Co/Ni-addition alloy is that the dispersoids are formed in Co/Ni-addition alloy without expensing Si. Therefore, there is little effect on the aging effect of Si in Co/Ni-addition alloy. Keywords: transition metals, hardness, microstructural, Al-Mg2Si, dispersoids.

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22

Qi, Guang Hui. "A High Effective and Low-Cost Modifier for Hypereutectic Al-Si Alloys." Advanced Materials Research 721 (July 2013): 282–86. http://dx.doi.org/10.4028/www.scientific.net/amr.721.282.

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In order to settle environment pollution and provide a high effective and low-cost modifier for refining the primary Si in hypereutectic Al-Si alloys, Al-Fe-P master alloys containing 2.0~5.0% phosphorus have been invented by casting method. The Al-Fe-P master alloys can be conveniently produced and an excellent modification can be obtained by adding 0.3~0.8wt% Al-Fe-P master alloy in Al-Si alloys containing 12%-25% Si at a relatively lower modifying temperature. The number of primary Si increases obviously and the average grain size of primary Si decreases largely, less than 50μm. Furthermore Al-Fe-P master alloys have many advantages, such as low cost, convenient operation technology, no pollution, stable and long-term modification effect, easy storage and etc. Al-Fe-P master alloys have overcome the shortages of current modifier and have a good future for hypereutectic Al-Si alloy modification.

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23

Novák, Pavel, and Kateřina Nová. "Oxidation Behavior of Fe–Al, Fe–Si and Fe–Al–Si Intermetallics." Materials 12, no. 11 (May 29, 2019): 1748. http://dx.doi.org/10.3390/ma12111748.

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Iron aluminides are still deeply investigated materials for their use in power plants, automotive and chemical industry, and other sectors. This paper shows that it is possible to strongly improve their oxidation behavior by the addition of silicon. The description of the synergic effect of aluminum and silicon on the oxidation behavior of Fe–Al–Si alloys at 800 °C in air is presented. The oxidation rate, microstructure, phase, and chemical composition of these ternary alloys are compared with the binary Fe–Al and Fe–Si alloys. Results showed that the oxidation of Fe–Al–Si ternary alloys provides an oxide layer based on aluminum oxide with a low concentration of iron and silicon. Below this oxide layer, there is a layer of silicides formed as a result of depletion by aluminum, which forms a secondary oxidation protection.

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Ho, C. R., and B. Cantor. "Heterogeneous nucleation of solidification of Si in Al-Si and Al-Si-P alloys." Acta Metallurgica et Materialia 43, no. 8 (August 1995): 3231–46. http://dx.doi.org/10.1016/0956-7151(94)00480-6.

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Cao, Dachun, Ya Liu, Xuping Su, Jianhua Wang, Hao Tu, and Jianfeng Huang. "Diffusion mobilities in the fcc_A1 Cu–Si, Al–Si and Al–Cu–Si alloys." Journal of Alloys and Compounds 551 (February 2013): 155–63. http://dx.doi.org/10.1016/j.jallcom.2012.09.070.

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Delijić, Kemal, Boštjan Markoli, and Iztok Naglič. "The Influence of the Chemical Composition on the Corrosion Performances of Some Al-Fe-Si, Al-Mg-Si and Al-Mg-Mn Type of Alloys." Metallurgical and Materials Engineering 20, no. 4 (December 31, 2014): 217–34. http://dx.doi.org/10.5937/metmateng1404217d.

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Paper presents the results on the corrosion behavior of some Al-Fe-Si, Al-Mg-Si and Al-Mg-Mn alloys in their final commercially usable tempered state. Durability of alloys was quantified and compared in the sense of corrosion rates in aqueous solutions while also having in mind the role of alloy chemistry. Open circuit corrosion potential (OCP) measurements, linear polarization and potentiodynamic anodic/cathodic polarization was employed in order to determine the corrosion behavior of samples in the mixture of chloride ions containing aqueous corrosion ambient. We found out that AlFe0.83Si0.18(AA8079), AlMg0.63Si0.72 (AA6005) and AlMg4Mn (AA5182) alloy exhibited the highest rates of passivation in 0.51 mol NaCl solution. The group of Al-Fe-Si alloys exhibited the greatest sensitivity to the changes in chemical composition under potentiodynamic polarization. Artificially aged Al-Mg-Si extruded profiles and fully annealed (after cold rolling) Al-Mg-Mn sheets exhibit very similar levels of equilibrium potentials E(I=0) in 0.51 mol NaCl solution. In the case of Al-Fe-Si alloys, we found that Fe/Si ratio also plays an important role, next to the total content of Fe and Si. Alloys with high Fe/Si ratios showed almost 30 % lower polarization resistance compared to the alloys with balanced Fe/Si, even in the case of the equal total content of alloying elements. The AlMg0.7Si1.2Mn0.8 alloy aged after quenching in the sprayed water and AlMg4Zn1.3Mn0.4 annealed sheet exhibit very similar levels of corrosion rates in 0.51 mol NaCl solution.

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Szymanek, M., B. Augustyn, D. Kapinos, J. Żelechowski, and M. Bigaj. "Al-Si-Re Alloys Cast by the Rapid Solidification Process / Stopy Al-Si-Re Odlewane Metodą Rapid Solidification." Archives of Metallurgy and Materials 60, no. 4 (December 1, 2015): 3057–62. http://dx.doi.org/10.1515/amm-2015-0488.

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The aim of the studies described in this article was to present the effect of rare earth elements on aluminium alloys produced by an unconventional casting technique. The article gives characteristics of the thin strip of Al-Si-RE alloy produced by Rapid Solidification (RS). The effect of rare earth elements on structure refinement, i.e. on the size of near-eutectic crystallites in an aluminium-silicon alloy, was discussed. To determine the size of crystallites, the Scherrer X-ray diffraction method was used. The results presented capture relationships showing the effect of variable casting parameters and chemical composition on microstructure of the examined alloys. Rapid Solidification applied to Al-Si alloys with the addition of mischmetal (Ce, La, Ne, Pr) refines their structure.

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YANAGAWA, Masahiro, Mutsumi ABE, and Shojiro OHIE. "Stretchability in Al-Mg Si alloys." Journal of Japan Institute of Light Metals 46, no. 1 (1996): 33–38. http://dx.doi.org/10.2464/jilm.46.33.

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Madelaine-Dupuich, O., and J. Stolarz. "Fatigue of Eutectic Al-Si Alloys." Materials Science Forum 217-222 (May 1996): 1343–48. http://dx.doi.org/10.4028/www.scientific.net/msf.217-222.1343.

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Hutt, J. E. C., D. H. StJohn, L. Hogan, and A. K. Dahle. "Equiaxed solidification of Al–Si alloys." Materials Science and Technology 15, no. 5 (May 1999): 495–500. http://dx.doi.org/10.1179/026708399101506184.

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Dahlborg, U., M. Besser, M. Calvo-Dahlborg, G. Cuello, C. D. Dewhurst, M. J. Kramer, J. R. Morris, and D. J. Sordelet. "Structure of molten Al–Si alloys." Journal of Non-Crystalline Solids 353, no. 32-40 (October 2007): 3005–10. http://dx.doi.org/10.1016/j.jnoncrysol.2007.05.031.

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IIMURA, Tomoaki, Naoya NAKATAKE, and Goroh ITOH. "Bendability of Al-Mg-Si alloys." Proceedings of Ibaraki District Conference 2002 (2002): 147–48. http://dx.doi.org/10.1299/jsmeibaraki.2002.147.

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SUZUKI, Shunsuke, Tomoaki IIMURA, Goroh ITOH, and Nobuhide ITOH. "Bendability of Al-Mg-Si alloys." Proceedings of Ibaraki District Conference 2003 (2003): 83–84. http://dx.doi.org/10.1299/jsmeibaraki.2003.83.

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TSUKAHARA, Hiromitsu, Shunsuke SUZUKI, Goroh ITOH, and Nobuhide ITOH. "Bendability of Al-Mg-Si alloys." Proceedings of Ibaraki District Conference 2004 (2004): 119–20. http://dx.doi.org/10.1299/jsmeibaraki.2004.119.

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Ho, C. R., and B. Cantor. "Modification of hypoeutectic Al-Si alloys." Journal of Materials Science 30, no. 8 (April 1995): 1912–20. http://dx.doi.org/10.1007/bf00353013.

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Pasko, Ján, and Stefan Gaspar. "Eutecticum Morphology in Al-Si Alloys." Advanced Materials Research 1014 (July 2014): 9–12. http://dx.doi.org/10.4028/www.scientific.net/amr.1014.9.

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The structure of casting silumins (Al-Si alloys) contains a big share of eutecticum (40-75%) which, as mentioned afore, enhance fluidity and decrease tendency towards formation of clefts and microporosity. Due to this fact the properties of α - phase on one hand as well as quantity, morphology, size, and distribution of eutectic silicium on the other hand are the most significant factors influencing mechanical properties of the casting.

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Jian, Li, E. E. Laufer, and J. Masounave. "Wear in Zn-Al-Si alloys." Wear 165, no. 1 (May 1993): 51–56. http://dx.doi.org/10.1016/0043-1648(93)90371-r.

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Torabian, H., J. P. Pathak, and S. N. Tiwari. "Wear characteristics of Al-Si alloys." Wear 172, no. 1 (February 1994): 49–58. http://dx.doi.org/10.1016/0043-1648(94)90298-4.

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Respaldiza, Miguel A., Gonzalo Madurga, and JoséC Soares. "TTPIXE analysis of Al/Si alloys." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 22, no. 1-3 (March 1987): 446–49. http://dx.doi.org/10.1016/0168-583x(87)90376-4.

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McDonald, Stuart D., Kazuhiro Nogita, and Arne K. Dahle. "Eutectic nucleation in Al–Si alloys." Acta Materialia 52, no. 14 (August 2004): 4273–80. http://dx.doi.org/10.1016/j.actamat.2004.05.043.

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Matsuda, Kenji, Junya Nakamura, Keisuke Yamamoto, Tokimasa Kawabata, Yasuhiro Uetani, and Susumu Ikeno. "TEM Observation of Metastable Phases in Aged Al-Mg-Ge Alloys." Materials Science Forum 654-656 (June 2010): 930–33. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.930.

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The purpose of study is to investigate aging behavior, crystal structures of metastable phase and relative frequency of metastable phases in aged Al-Mg-Ge and Al-Mg-Ge-Si alloys using high resolution transmission electron microscope (HRTEM), energy dispersive X-ray spectroscopy (EDS) and electron energy-loss spectroscopy (EELS). Every alloy included rod-shaped precipitate which is the same as the typical metastable pahse, ’, in Al-Mg-Si alloy. Except to Mg-rich alloys, the Type-A precipitate, which is a typical metastable phase in the excess Si type Al-Mg-Si alloys and popular at over aged condition, was confirmed as a large rod-shaped precipitates in those alloys. This behavior is probably depends on the ratio of Mg/Ge. Also, Mg, Si and Ge were detected from the ’-phase in Al-Mg-Ge-Si alloy by EELS. This means that the ’-phase in Al-Mg-Ge-Si alloy consists of these 3 elements including Si, not just Ge to form metastable Mg2Ge.

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Alexopoulos, Nikolaos D., Vangelis Migklis, Stavros K. Kourkoulis, and Zaira Marioli-Riga. "Fatigue Behavior of Aerospace Al-Cu, Al-Li and Al-Mg-Si Sheet Alloys." Advanced Materials Research 1099 (April 2015): 1–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1099.1.

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In the present work, an experimental study was performed to characterize and analyze the tensile and constant amplitude fatigue mechanical behavior of several aluminum alloys, namely 2024 (Al-Cu), 2198 (Al-Li) and 6156 (Al-Mg-Si). Al-Li alloy was found to be superior of 2024 in the high cycle fatigue and fatigue endurance limit regimes, especially when considering specific mechanical properties. Alloy 6156 was found to have superior constant amplitude fatigue performance that the respective 6xxx series alloys; more than 15% higher endurance limit was noticed against 6061 and almost 30% higher than 6082. Alloy 6156 presented only a marginal increase in fatigue life for the HCF regime.

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Jia, Su Qiu, Sheng Jie Li, Hua Chen, Zhan Kui Zhao, and Wen Ke Gao. "Microstructures and Properties of Zn-Al-Si Cast Alloys." Applied Mechanics and Materials 80-81 (July 2011): 158–62. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.158.

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Zn-Al-Si cast alloys with different content Al and Si such as ZA11Si1, ZA24Si3 and ZA40Si5 were fabricated by metal mould. Zn-Al-Si alloys were composed of α+η or α+η and Si phase. The dendritic particles in ZA11Si1 were smaller than ZA24Si3 and ZA40Si5 and Si phase did not appear in it. The microstructures of ZA24Si3 and ZA40Si5 alloy were larger dendrites and more lump, strip Si phases were dispersed unevenly. ZA24Si3 had the highest mircoharness compare with ZA11Si1 and ZA40Si5, which had the almost same microhardness. ZA11Si11 wear volume was the lowest than those of the pure Zn and the other two Zn-Al-Si alloys and its wear resistance was the best. 11 wt% Al and 1 wt% Si content in the Zn-Al-Si alloy favored the microhardness and wear resistance improvement.

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Han, Yi, Chu Yan Wang, Tong Guang Zhai, and Hiromi Nagaumi. "Morphology of Si Phase in Al-Mg-Si-Cu Alloys with Excess Si Addition." Materials Science Forum 783-786 (May 2014): 161–67. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.161.

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The morphology of Si phase and its growth manner in the Al-Mg-Si-Cu alloys with amounts of excess silicon were investigated using by a combination of the higher magnification microstructure and DSC measurements. Solidification characteristics of the alloys were predicted by thermodynamic calculation and compared to the experimental results. It was found that addition of higher amount of excess silicon led to the formation of the evidently morphological Si phase, especially when the silicon content was beyond 1.35 wt.%. The Si phase was one of the dominant phases in the alloys and its reaction peak was identified with the onset temperature of 550.43oC in the DSC curves. These experimental results were in good agreement with the thermodynamic calculations by the Gulliver-Scheil model. Keywords: Al-Mg-Si-Cu alloy; morphology; thermodynamic calculation; excess Si

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Muralidharan, G., M. C. Petri, J. E. Epperson, and Haydn Chen. "Interaction of Si and Al during interdiffusion in NiAlSi alloys." Scripta Materialia 36, no. 2 (January 1997): 219–25. http://dx.doi.org/10.1016/s1359-6462(96)00362-4.

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Li, Jie Hua, Mihaela Albu, Thomas Ludwig, Y. Matsubara, Ferdinand Hofer, Lars Arnberg, Y. Tsunekawa, and Peter Schumacher. "Modification of Eutectic Si in Al-Si Based Alloys." Materials Science Forum 794-796 (June 2014): 130–36. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.130.

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The paper provides a new insight into the modification of eutectic Si in Al-Si based alloys. To date, impurity-induced twinning mechanism and twin plane re-entrant edge mechanism are the well-accepted theories. However, neither IIT nor TPRE can be used to interpret all modification observations. Therefore, a re-consideration of modification mechanisms is still required. In this contribution, recent advances on the understanding the modification of eutectic Si are reviewed. Two different cases are highlighted. In the case of Sr, Na and Eu addition, eutectic Si was modified from a faceted to a fibrous morphology, which involves the formation of multiple Si twinning. In the case of Yb and Ca addition, eutectic Si was refined to a smaller size, but still maintained a plate-like morphology. The possible modification mechanism was thus discussed in terms of (i) adsorption of atoms at twin re-entrant edge, and (ii) segregation across {111}Sigrowth planes. Furthermore, solute entrainment of modifying elements (M) was introduced to interpret the formation of Al2Si2M phase or M-rich clusters within Si crystals.

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Tokuda, M., K. Matsuda, T. Nagai, T. Kawabata, J. Nakamura, and S. Ikeno. "Hrtem Observation of the Precipitates in Cu and Ag Added Al-Mg-Si Alloys." Archives of Metallurgy and Materials 58, no. 2 (June 1, 2013): 363–64. http://dx.doi.org/10.2478/v10172-012-0200-7.

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It has been known that Cu- and Ag-added Al-1.0mass%Mg2Si alloys (Al-Mg-Si-Cu alloy and Al-Mg-Si-Ag alloy) have higher hardness and elongation than those of Al-1.0mass%Mg2Si alloy. In this study, the aging behaviour of Al-Mg-Si-Cu alloy, Al-Mg-Si-Ag alloy and (Cu+Ag)-addition Al -1.0 mass% Mg2Si alloy has been investigated by hardness test and TEM observation. The Al-Mg-Si-Cu-Ag alloy has the fastest age-hardening rate in the early aging period and the finest microstructure at the peak hardness among three alloys. Therefore the microstructure of the precipitate in Al-Mg-Si-Cu-Ag alloy has been investigated by HRTEM observation to understand the effect of Cu and Ag addition on aging precipitation.

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Banjongprasert, Chaiyasit, S. C. Hogg, I. G. Palmer, N. Grennan-Heaven, I. C. Stone, and Patrick S. Grant. "Spray Forming of Al-Fe-Cr-Ti and Al-Si-Li Alloys." Materials Science Forum 561-565 (October 2007): 1075–78. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.1075.

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This work presents an investigation of the spray forming and downstream processing of Al alloys that are difficult to produce in bulk by conventional solidification processing: Al-Fe-Cr-Ti alloys for intermediate temperature applications and Al-Si-Li alloys for high stiffness, low density applications in fast moving machinery. For the Al-Fe-Cr-Ti alloys, spray forming is being investigated to allow the scale-up of alloy compositions previously explored only as ribbons or powders in traditional rapid solidification routes. For Al-Si-Li alloys, spray forming is used to provide globular primary AlLiSi in a fully divorced AlLiSi/α-Al eutectic structure. For both alloys, the as spray formed and downstream processed microstructure of 20kg billets has been investigated by scanning electron microscopy, electron probe microanalysis, and X-ray diffractometry. Preliminary mechanical properties have also been investigated.

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Seo, Dong-Wook, Jun-Ho Kim, Myeong-Hoon Lee, and Seung-Hyo Lee. "Microstructure and Corrosion Characteristics According to the Si Content of Al–Ca-Si Alloys." Science of Advanced Materials 14, no. 7 (July 1, 2022): 1249–57. http://dx.doi.org/10.1166/sam.2022.4311.

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Aluminum is a general-purpose metal widely used in industrial fields owing to its excellent characteristics such as high specific strength, low density, excellent formability, and adequate corrosion resistance. However, Al has poor mechanical properties. To address this limitation, trace elements such as Si, Mg, and Cu are added to form Al alloys; however, the corrosion resistance is often reduced. Therefore, the development of an Al alloy that exhibits satisfactory mechanical properties, castability, and corrosion resistance is necessary. To this end, Al–Ca-based alloys were developed. The microstructures of these alloys were analyzed, and results indicated the formation of Al4Ca+Al2Si2Ca with a fine lamellar structure. The alloys in which Si was added to the Al–Ca-based alloy had more refined structures. Moreover, AC4S7 exhibited a fine microstructure, formed a highdensity shallow pit, and served as a barrier to corrosion products, which is a major advantage. Electrochemical measurements were conducted, which demonstrated the positive influence of this structure in improving the corrosion resistance of the alloy.

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Xie, Jing Pei, Jie Fang Wang, Ai Qin Wang, Wen Yan Wang, Ji Wen Li, and Zhong Xia Liu. "Investigation on Wear Resistance of Al-Si-Ti Piston Alloys Produced by Electrolysis." Materials Science Forum 546-549 (May 2007): 905–10. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.905.

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The wear resistance, microstructures, worn surface morphology, TiAl3 phases, eutectic Si particles and the high density of dislocations of the Al-Si-Ti piston alloys have been studied by means of SEM and TEM. The electrolytic low-titanium aluminium alloys were used to make the Al-Si-Ti pistons alloy, the experiment results showed that the wear resistance of the Al-Si-Ti alloy was 1.49 times of that of the Al-Si alloy, and the wear mechanism was mainly plastic deformation wear. The relationship between wear resistances and the yield strength of the Al-Si-Ti piston alloys were established, and the wear mechanism investigated by mean of plastic-elasticity theory. When Ti content is reached to 0.12%, the yield strength of the Al-Si-Ti piston alloy increased from 255 Mpa to 358 Mpa.

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Journal articles on the topic 'Al-Si Alloys'

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