In situ development of AlBx/AA6060 and AA5083 alloys cast composites

Moldovan, Petru; Dragut, Dumitru Valentin; Butu, Mihai; Besea, Liviu-Marian; Preda, Eugen

doi:10.1016/j.compositesb.2016.04.057

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…Cast aluminum alloys are widely utilized in the global automotive and aerospace industries due to their high specific strength and stiffness, low density, and excellent casting properties [1,2,3]. In recent years, aluminum matrix composites reinforced with discontinuous ceramic particles, fibers, or whiskers have been attracting extensive attention [4,5,6,7]. With the addition of ceramic reinforcement, the composites exhibit superior mechanical strength, thermal physical properties, and fatigue resistance contrasted with matrix alloys [8,9,10,11,12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Differences in Dry Sliding Wear Behavior between Al–12Si–CuNiMg Alloy and Its Composite Reinforced with Al2O3 Fibers

Zhang

Wei

et al. 2019

Materials

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The dry sliding wear behavior of the Al-12Si-CuNiMg matrix alloy and its composite reinforced with Al2O3 fibers was investigated using a pin-on-disk wear-testing machine. The volume fraction of Al2O3 fibers in the composite was 17 vol.%. Wear tests are conducted under normal loads of 2.5, 5.0, and 7.5 N, and sliding velocities of 0.25, 0.50, and 1.0 m/s. Furthermore, the worn surfaces of the matrix alloy and the composite were examined using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that the wear resistance of the composite was inferior to that of the matrix alloy, which could be attributed to the high content of reinforcement and casting porosities in the composite. Worn-surface analysis indicates that the dominant wear mechanisms of both materials were abrasive wear and adhesive wear under the present testing conditions.

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Section: Introductionmentioning

confidence: 99%

Differences in Dry Sliding Wear Behavior between Al–12Si–CuNiMg Alloy and Its Composite Reinforced with Al2O3 Fibers

Zhang

Wei

et al. 2019

Materials

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“…For sintered-Al/Borax mixtures, AlB 2 is found on the peaks 31. 885, 34.537, 36.376 and 44.809°compared to the literature survey (Whittaker and Cutler, 2013;Karantzalis et al, 2011;Khaliq et al, 2014;A gao gullari et al, 2012;Moldovan et al, 2016). AlB 2 peaks are not seen on the green-Al-Borax mixture.…”

Section: Resultsmentioning

confidence: 49%

The effect of borax addition to aluminum alloy produced by powder metallurgy on mechanical and thermophysical properties

Mutlu

Acar

Gizir

2021

ACMM

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Purpose Lightweight, durable and economical materials production has gained considerable importance according to the needs of developing technology. The purpose of this paper is to develop an new aluminum alloy by powder metalurgy. Design/methodology/approach Powder metallurgy, which provides controllably on desired end product, method was applied. Aluminum alloy was created with Al, Zn, Mg, Cu powders and 1.5% Na2[B4O5(OH)4].8H2O added. It was pressed under high pressure and sintered at 600 °C under N2 gas atmosphere. Density, hardness behaviors and thermal properties were determined. Surfaces and crystal structures of samples were characterized. Findings The addition of borax made easier grains coming to together, acting as binders and the AlB2 crystal phase was formed. It was also observed that MgZn2, Al2CuMg phases were formed. In this way, the pores between the particles of the material were reduced from 35% to 5% total porosity and the hardness of the material was increased 29 N/mm2 to 45 N/mm2 (Brinell Hardness, HB). The surface properties improved and the hydrophobicity of the surface (from 63° to 102° contact angle with borax) increased. Thus, the heat transfer among atoms get easier and the borax addition decreased specific heat capacity and enthalpy of aluminum–borax samples. This situation was also simulated with the heat transfer module of COMSOL. As result, the energy required reduced. In the other word, sintering process occurred at low temperature and more efficient. Originality/value New aluminum alloy has been created from different amounts of Zn, Mg, Cu elemental powders. In addition to literature, relationship of borax and aluminum and other alloying elements on the mechanical, thermophysical and surface properties of new obtained aluminum alloy has been investigated.

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“…As mentioned earlier, because it is chemically very stable, TiB 2 is expected not to form chemical compounds during the composite fabrication process [22,23]. Actually, the results of EDS analysis of the TiB 2 /Al1050 interface indicate no chemical reaction between TiB 2 and the Al1050 matrix at 1000 • C, implying that the TiB 2 -Al composites fabricated in this experiment do not have extremely brittle compounds such as Al 3 Ti or AlB 2 , which are formed through chemical reactions [24][25][26]. Consequently, the TiB 2 -Al composites fabricated by LPI process, having sound microstructures without brittle compounds, indicate the possibility of achieving mechanical properties better than those of other composites fabricated by other ex-situ processes.…”

Section: Microstructure Of Tib 2 -Al1050 Compositesmentioning

confidence: 92%

Fabrication of TiB2–Al1050 Composites with Improved Microstructural and Mechanical Properties by a Liquid Pressing Infiltration Process

Park

Lee

et al. 2020

Materials

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This study was conducted on titanium diboride (TiB2) reinforced Al metal matrix composites (MMCs) with improved properties using a TiB2 and aluminum (Al) 1050 alloy. Al composites reinforced with fine TiB2 at volume ratios of more than 60% were successfully fabricated via the liquid pressing infiltration (LPI) process, which can be used to apply gas pressure at a high temperature. The microstructure of the TiB2–Al composite fabricated at 1000 °C with pressurization of 10 bar for 1 h showed that molten Al effectively infiltrated into the high volume-fraction TiB2 preform due to the improved wettability and external gas pressurization. In addition, the interface of TiB2 and Al not only had no cracks or pores but also had no brittle intermetallic compounds. In conclusion, TiB2–Al composite, which has a sound microstructure without defects, has improved mechanical properties, such as hardness and strength, due to effective load transfer from the Al matrix to the fine TiB2 reinforcement.

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In situ development of AlBx/AA6060 and AA5083 alloys cast composites

Cited by 7 publications

References 7 publications

Differences in Dry Sliding Wear Behavior between Al–12Si–CuNiMg Alloy and Its Composite Reinforced with Al2O3 Fibers

Differences in Dry Sliding Wear Behavior between Al–12Si–CuNiMg Alloy and Its Composite Reinforced with Al2O3 Fibers

The effect of borax addition to aluminum alloy produced by powder metallurgy on mechanical and thermophysical properties

Fabrication of TiB2–Al1050 Composites with Improved Microstructural and Mechanical Properties by a Liquid Pressing Infiltration Process

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