Growth of octahedral primary silicon in cast hypereutectic Al–Si alloys

Xu, Chao; Wang, H.Y.; Liu, C.; Jiang, Qi‐Chuan

doi:10.1016/j.jcrysgro.2006.03.044

Cited by 83 publications

(51 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Faceted octahedra formed in the AlFe3Mn2Si6 alloy (Fig. 3a) were similar to those of the Si, formed in the hypereutectic AlSi alloys [16,17]. It might be assumed that they were limited with close packed {111} planes, typical for the many others cubic crystals.…”

Section: Morphology Of the Primary Crystals Of The Alfemnsi Intermetamentioning

confidence: 60%

Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

Warmuzek

2017

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

In this paper the results of the microscopic observations of the intermetallic AlFeMnSi phases crystals formed in the liquid hypo-and eutectic AlSi alloys containing transition metals 3.0 wt.% Fe and 0.1, 0.5 and 2.0 wt.% Mn were presented. The crystals morphology has been revealed on both polished and deep etched microsections. The different stages of the primary AlFeMnSi phases particles formation in the solidifying alloy and their final morphology were shown as influenced by cooling rate and alloy chemical composition.

show abstract

Section: Morphology Of the Primary Crystals Of The Alfemnsi Intermetamentioning

confidence: 60%

Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

Warmuzek

2017

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

show abstract

“…The edge growth rate V<E>, the angle growth rate V<100> and the (111) crystal plane growth rate V<111> are assumed constant. From Figure 12 [22], it can be seen that, …”

Section: Sem Analysesmentioning

confidence: 99%

“…Most of the Si shows as small octahedrons without holes or other defects. According to the research of [22], octahedral primary Si has regular angle, edge and (111) crystal planes. The intersection angle between two adjacent (111) crystal plane is 141°.…”

Section: Sem Analysesmentioning

confidence: 99%

Study on Dual Modification of Al-17%Si Alloys by Structural Heredity

Zhang

Chen

et al. 2015

Metals

View full text Add to dashboard Cite

Abstract:In this study, Al-17%Si alloys were dual modified by fine-grained structural materials (FSM) according to structural heredity. Microstructure and thermal analyses were undertaken to study the modification effect of the FSM master alloy on primary and eutectic Si. Primary Si is refined to a smaller size and eutectic Si is modified from needle-like to fibrous shape after FSM master alloy addition. The optimal content of FSM master alloy is 20% and the holding time is 15min. Finer FSM master alloy leads to finer Al-17%Si alloy microstructure and more area percentage of α-Al. DSC analyses results show that FSM master alloy can raise the precipitation temperatures of primary and eutectic Si, meanwhile it can reduce the latent heat of Si solidification process.

show abstract

“…[8] The primary Si particles often are sparsely spaced, coarse, and have complex faceted polyhedral shapes. [9,10] Therefore, the 3D microstructure of cast Al-Si base alloys contains numerous constituents of complex shapes/morphologies; some of these constituents/phases are spaced sparsely; spatial correlations exist among the constituents/phases; and the length scales of different types of microstrucutral features can span over two orders of magnitude (e.g., eutectic Si platelets have thickness on the order of few microns, whereas gas pores can be of a few microns to a few hundred microns in size [6,7] ). These geometric attributes of the microstructure affect the mechanical properties such as strength, toughness, and abrasion resistance and, therefore, must be included in the microstructure-based modeling and simulations of the material behavior.…”

Section: Introductionmentioning

confidence: 99%

“…[9,11] In a few cases, small volume segments of the 3D microstructures were reconstructed for observations of the 3D morphologies. [12][13][14] Nevertheless, these 3D microstructure reconstructions mostly were restricted to the rendering of only one phase/ constituent of interest in the multiphase, multiscale cast Al-Si base alloy microstructures because of large differences in the length scales of different phases/ constituents.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction and Quantitative Characterization of Multiphase, Multiscale Three-Dimensional Microstructure of a Cast Al-Si Base Alloy

Singh

Gokhale

Mao

et al. 2009

Metall Mater Trans B

View full text Add to dashboard Cite

The serial sectioning technique is well known for the reconstruction of three-dimensional (3D) microstructures of opaque materials. In recent years, techniques also have been developed for the reconstruction of high-fidelity, large-volume segments of 3D microstructures that use montage serial sections and robot-assisted automated acquisitions of montage serial sections. This article reports the reconstruction of the multiphase, multiscale 3D microstructure of a permanent mold cast unmodified Al-12 wt pct Si-1 wt pct Ni base alloy that contains eutectic Si platelets, coarse primary polyhedral Si particles, Fe-rich script intermetallic particles, and pores. These constituents are segmented, reconstructed, rendered, and characterized in three dimensions. The estimated 3D microstrucutral attributes include the distribution of eutectic platelet thickness; the mean volume, mean surface area, and mean thickness of the eutectic Si platelets; the mean volume and the mean surface area of the polyhedral primary Si particles; and the mean number of faces, edges, and corners on the polyhedral primary Si particles.

show abstract

Growth of octahedral primary silicon in cast hypereutectic Al–Si alloys

Cited by 83 publications

References 31 publications

Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

Primary Crystals of AlfeMnSi Intermetallics in the Cast AlSi Alloys

Study on Dual Modification of Al-17%Si Alloys by Structural Heredity

Reconstruction and Quantitative Characterization of Multiphase, Multiscale Three-Dimensional Microstructure of a Cast Al-Si Base Alloy

Contact Info

Product

Resources

About