Microstructure and mechanical behaviour of Al–Si–Mg alloys reinforced with Ti–Al intermetallics

Salvador, M. D.; Amigó, V.; Martinez, N.; Busquets, D.

doi:10.1016/s0924-0136(03)00440-0

Cited by 30 publications

(25 citation statements)

References 10 publications

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“…Secondly, the formation of insitu fineTiB 2 and TiAl 3 precipitates inside the Al matrix, which act as reinforcing particles. These fine precipitates are very hard, very stable even at high temperature and they can be considered as reinforcement candidates, as reported by other investigators (Salvador et al, 2003). As a final conclusion, the presence of TiB 2 and TiAl 3 with high percentages can be considered as grain refining and reinforcing particles.…”

Section: Discussionsupporting

confidence: 69%

“…On the other hand, there was a great limitation on the amount of TiB 2 particles added to the matrix due to the higher viscosity of the resultant MMCs. Accordingly; several studies have been conducted to syntheses the in situ TiB 2 particulate reinforced Al-based composites with enhanced mechanical properties (Salvador et al, 2003;Tjong and Huo, 2009;Boopathi et al, 2013;Sivaprasada et al, 2008).…”

Section: Science Publicationsmentioning

confidence: 99%

“…These unique properties of Al based MMCs reinforced with titanium aluminides make them a good candidate to substitute traditional high temperature alloys, such as nickel super alloys, in the aerospace industry, especially in turbine elements (Salvador et al, 2003).…”

Section: Science Publicationsmentioning

confidence: 99%

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Characterization of Aluminum Alloy-Based Nanocomposites Produced by the Addition of Al-Ti5-B1 to the Matrix Melt

El-Labban

Abdelaziz²,

Mahmoud³

2013

American Journal of Nanotechnology

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The present study is an attempt to produce aluminum matrix nanocomposites using a certain aluminum alloy (which its melt has high fluidity) as a matrix material and reinforced with hard and stable fine (nano-sized) precipitates. Therefore, Al-Ti5-B1 master alloy and Al-Si alloy of high silicon content were proposed for preparation of such nanocomposites. Three nanocomposites were prepared by adding AlTi5-B1 of three different percentages (1, 2 and 3 wt. %) to the melt of aluminum alloy at 710°C for a holding time of 10 min and application of mechanical stirring at this temperature. Finally, the treated melt was squeeze cast. The microstructures were investigated using optical and scanning electron microscopes. Phases and different constituents were analyzed with the aid of EDX and XRD analyzers. The addition of Al-Ti5-B1 master alloy with any percentages (even 1 wt. %) to the melt of aluminum alloy, led to remarkable decrease of the matrix grain size. Moreover, many fine precipitates were detected within the Al-Si matrix such as TiAl 3 phase in the form of flaky and blocky morphology and TiB 2 phase in the nano-sized particles. These precipitates act as heterogeneous sites for nucleation during solidification. The addition of Al-Ti5-B1 master alloy to the Al-Si base metal led to remarkable increase in the average hardness. As the added percentage of Al-Ti5-B1 master alloy is increased, the average hardness value is increased. The average hardness of addition of 3 wt. % Al-Ti5-B1 master alloy reached 130 HV, which was almost twice as high as the hardness of the Al-Si base metal.

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Section: Discussionsupporting

confidence: 69%

Section: Science Publicationsmentioning

confidence: 99%

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Characterization of Aluminum Alloy-Based Nanocomposites Produced by the Addition of Al-Ti5-B1 to the Matrix Melt

El-Labban

Abdelaziz²,

Mahmoud³

2013

American Journal of Nanotechnology

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“…The particular composition of the Al-Si powder chosen for investigation is given in Table 1. The customization of the powder's composition was also pertinent to the particular desire for Ni-Al and Al-Si-X (where X ¼ Cu, Mg) intermetallic compounds for possible improved mechanical properties (Estrada and Duszczyk, 1990;Gloriant and Greer, 1998;Jain and Gupta, 2003;Park et al, 1996;Salvador et al, 2003;Satyanarayana et al, 2001;Srinivasan and Chattopadhyay, 2004;Srivastava et al, 2002;Srivatsan et al, 1995;Wang et al, 2004).…”

Section: Methodsmentioning

confidence: 99%

FIB cross‐sectioning of a single rapidly solidified hypereutectic Al‐Si powder particle for HRTEM

Rea

Agarwal

Mckechnie

et al. 2005

Microscopy Res & Technique

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A creative technique of in-situ focused ion beam (FIB) extraction was introduced to prepare a gas atomized rapidly solidified hypereutectic Al-Si single particle's cross-section for High Resolution Transmission Electron Microscopy (HRTEM) analysis. This preparation technique may be employed to characterize very inimitable samples that are abnormally wrought or intricate to prepare through traditional techniques. TEM results revealed that a gas-atomization/rapid solidification process leads to a homogeneous dispersion of 50-100-nm Si phase in the Al matrix. Stacking faults and dislocations are observed in the microstructure and will ultimately lead to the increased strength in a resultant bulk material manufactured from this powder to be further examined. Microsc. Res. Tech. 66:10-16, 2005. ' 2005 Wiley-Liss, Inc.

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“…Recently, some intermetallic compounds such as TiAl, Ti 3 Al, and Ni 3 Al were used to reinforce metal matrix composites [8][9][10]. Unlike ceramic particles, intermetallic compound consists of two types of atomic bonds, i.e.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

Li¹,

Zhang²,

Niu³

et al. 2014

Materials Science and Engineering: A

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An yttrium aluminum (YAl 2 ) intermetallic compound ingot was prepared in an induction furnace under vacuum. The microstructure of YAl 2 ingot was characterized by optical microscopy, scanning electron microscopy, and X-ray diffraction. The load bearing response of YAl 2 intermetallic was investigated and compared with SiC ceramic by indentation combined with optical microscopy and scanning electron microscopy. Additionally, the tensile properties of the Mg-Li matrix composites reinforced with ultrafine YAl 2 particles fabricated by planet ball milling were tested.The results show that the intermetallic compound ingot in this experiment is composed of a main face-centered-cubic structure YAl 2 phase, a small amount of YAl phase, and minor Y and Al-rich phases. YAl 2 intermetallic compound has excellent stability and shows better capability in crack resistance than SiC ceramic. The YAl 2 intermetallic compound has better deformation compatibility with the Mg-14Li-3Al matrix than SiC reinforcement with the matrix, which leads to the superior resistance to crack for YAl 2p /Mg-14Li-3Al composite compared to SiC p /Mg-14Li-3Al composite.2

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Microstructure and mechanical behaviour of Al–Si–Mg alloys reinforced with Ti–Al intermetallics

Cited by 30 publications

References 10 publications

Characterization of Aluminum Alloy-Based Nanocomposites Produced by the Addition of Al-Ti5-B1 to the Matrix Melt

Characterization of Aluminum Alloy-Based Nanocomposites Produced by the Addition of Al-Ti5-B1 to the Matrix Melt

FIB cross‐sectioning of a single rapidly solidified hypereutectic Al‐Si powder particle for HRTEM

Microstructure, properties and application of YAl2 intermetallic compound as particle reinforcements

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