Microstructure Solidification Maps for Al-10 Wt Pct Si Alloys

Hearn, William; Bogno, Abdoul-Aziz; Spinelli, José Eduardo; Valloton, J.; Henein, H.

doi:10.1007/s11661-018-5093-2

Cited by 21 publications

(18 citation statements)

References 28 publications

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“…A method was adopted using "Hall-Petch" relationships to compare the strengths of the two tested conditions. This kind of approach was also demonstrated elsewhere [41,42]. This approach establishes the alloy tensile strength as a function of a representative microstructural spacing instead of comparing the strength to the grain size.…”

Section: Resultsmentioning

confidence: 93%

The role of eutectic colonies in the tensile properties of a Sn–Zn eutectic solder alloy

Ramos

Reyes

Gomes

et al. 2020

Materials Science and Engineering: A

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Section: Resultsmentioning

confidence: 93%

The role of eutectic colonies in the tensile properties of a Sn–Zn eutectic solder alloy

Ramos

Reyes

Gomes

et al. 2020

Materials Science and Engineering: A

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“…This estimation relied on a thermal analysis that was developed by Garcia et al [15] and expanded on by Spinelli et al [11] The methodology is detailed in previous studies. [8,11] The data used for this analysis are presented in Table 3. The latent heat of fusion was calculated by a computational thermodynamics software (Thermo-Calc), using the TCAL7 database.…”

Section: Iamentioning

confidence: 99%

“…The same characteristics were reported in previous investigations on eutectic morphology transitions. [8,25] To verify the distribution of Bi and other elements within the microstructures generated by rapid solidification, an area analysis by energy-dispersive X-ray spectroscopy (EDS) was performed as shown in Figure 4 for a 425 μm particle. The α-Al dendritic matrix highlighted in green and the Si phase particles in red are shown in Figure 4, while Bi globules appear spread over the entire image in yellow.…”

Section: Microstructures Over a Wide Range Of Cooling Ratesmentioning

confidence: 99%

“…However, this range is limited to cooling rates provided by the water-cooled mold. Higher values may be reached by processes involving rapid solidification.Hearn et al [8] reported typical hypoeutectic microstructures characterized by proeutectic α-Al dendrites surrounded by α-Al þ Si eutectic. The Al-10 wt%Si alloy was solidified by differential scanning calorimetry (DSC) with cooling rates of 0.01, 0.02, 0.08, 0.2, 0.3, and 0.8 K s À1 .…”

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confidence: 99%

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Microstructure and Hardness of an Al–8 wt%Si–2.5 wt%Bi Alloy Subjected to Solidification Cooling Rates from 0.1 to 800 K s⁻¹

et al. 2022

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Al-Si alloys have a wide range of applications in automotive and aerospace components due to their favorable properties such as low density, high specific stiffness, resistance to high temperatures and abrasion, and low thermal expansion coefficient. [1] Alloying elements have been strategically included into the composition of Al-Si-based alloys in order to improve specific properties of interest. [2][3][4][5] For tribological applications, elements with solid lubricant ability, such as bismuth and tin are of interest to Al-Si alloys for improved bearing performance. This performance depends strongly on the alloy's microstructural features, such as the secondary dendrite arm spacing, the eutectic lamellar spacing, or the spacing between the soft and immiscible Bi particles in the aluminum matrix. [6] Efforts have been put by Costa et al. [5] and Dias et al. [7] into studies of microstructural arrangements of such alloys, particularly Al-Si-Bi, correlated with a range of solidification thermal parameters provided by a water-cooled mold. However, this range is limited to cooling rates provided by the water-cooled mold. Higher values may be reached by processes involving rapid solidification.Hearn et al. [8] reported typical hypoeutectic microstructures characterized by proeutectic α-Al dendrites surrounded by α-Al þ Si eutectic. The Al-10 wt%Si alloy was solidified by differential scanning calorimetry (DSC) with cooling rates of 0.01, 0.02, 0.08, 0.2, 0.3, and 0.8 K s À1 . The eutectic microstructure was reported to have a flaky morphology for all the conditions examined. Costa et al. [5] examined the effect of adding 1 wt%Bi to an Al-9 wt%Si alloy. They reported that the secondary and tertiary dendrite arm spacings are not affected. However, a coarsening effect on the primary arm spacing is shown to occur for the ternary alloy when compared to the binary alloy for similar cooling rates. The addition of Bi was shown not to affect the ultimate tensile strength. However, the elongation to fracture is improved. Furthermore, a higher machinability is achieved,

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“…The results indicated that Pb/Al-Si@Al 2 O 3 catalyst possessed optimal hydrogenation performance when the size and aluminum content were 5 µm and 88%, respectively. Al-Si powder, with different amounts of Si, exhibits different morphologies [21][22][23]. The eutectic Si can be observed when Si content in Al-Si powder is less than 12.6 at.…”

Section: Introductionmentioning

confidence: 99%

Al-Si@Al(OH)3 Nanosheets Composite for Enhanced Efficient Strategy to Synthesize Al-Si@Al2O3 Core-shell Structure

Lin

Chen

Wang

et al. 2021

Preprint

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Owing to the combined advantages of Al-Si alloy and Al2O3, Al-Si@Al2O3 is widely utilized as a heat storage material, catalyst carrier and what adsorption host. Hence, the preparation of Al-Si@Al2O3 and corresponding precursors is of utmost significance. Herein, Al-Si@Al(OH)3 precursor is investigated and Al(OH)3 nanosheets are in-situ formed on the surface of Al-xSi alloy (x = 10, 20 and 30) in the presence of water. The influence of Si content, diameter of Al-Si particles and heating parameters on morphology and thickness of Al(OH)3 nanosheets is systematically explored using X-ray diffraction, electron microscopy, Fourier transform infrared spectroscopy and N2 adsorption/desorption isotherms. The growth mechanism of Al(OH)3 nanosheets is revealed and a pathway to obtain Al-Si@Al2O3 nanosheets with desired structure and thickness is demonstrated.

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Microstructure Solidification Maps for Al-10 Wt Pct Si Alloys

Cited by 21 publications

References 28 publications

The role of eutectic colonies in the tensile properties of a Sn–Zn eutectic solder alloy

The role of eutectic colonies in the tensile properties of a Sn–Zn eutectic solder alloy

Microstructure and Hardness of an Al–8 wt%Si–2.5 wt%Bi Alloy Subjected to Solidification Cooling Rates from 0.1 to 800 K s⁻¹

Al-Si@Al(OH)3 Nanosheets Composite for Enhanced Efficient Strategy to Synthesize Al-Si@Al2O3 Core-shell Structure

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Microstructure Solidification Maps for Al-10 Wt Pct Si Alloys

Cited by 21 publications

References 28 publications

The role of eutectic colonies in the tensile properties of a Sn–Zn eutectic solder alloy

The role of eutectic colonies in the tensile properties of a Sn–Zn eutectic solder alloy

Microstructure and Hardness of an Al–8 wt%Si–2.5 wt%Bi Alloy Subjected to Solidification Cooling Rates from 0.1 to 800 K s−1

Al-Si@Al(OH)3 Nanosheets Composite for Enhanced Efficient Strategy to Synthesize Al-Si@Al2O3 Core-shell Structure

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Microstructure and Hardness of an Al–8 wt%Si–2.5 wt%Bi Alloy Subjected to Solidification Cooling Rates from 0.1 to 800 K s⁻¹