Compressive properties of Al-Si-SiC composite foams at elevated temperatures

Liu, Jiaan; Qu, Qingxiang; Liu, Yan; Li, Rongguang; Liu, Bing

doi:10.1016/j.jallcom.2016.03.076

Cited by 44 publications

(21 citation statements)

References 17 publications

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“…Metals 2019, 9, x FOR PEER REVIEW 5 of 11 form in the matrix and the interface during the compressive fracture. Therefore, it could be concluded that the fracture mechanism changed from the brittle mode to the combination of the brittle and ductile mode because of the softening effect of the Al matrix at the elevated temperature of the composites [22]. The crystalline phase patterns of the composites obtained by high temperature x-ray diffractometer (HT-XRD) are shown in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 3d shows that there were no significant brittle fracture phenomena at 300 • C. Instead, many tear ridges appeared to form in the matrix and the interface during the compressive fracture. Therefore, it could be concluded that the fracture mechanism changed from the brittle mode to the combination of the brittle and ductile mode because of the softening effect of the Al matrix at the elevated temperature of the composites [22]. Metals 2019, 9, x FOR PEER REVIEW 5 of 11 form in the matrix and the interface during the compressive fracture.…”

Section: Resultsmentioning

confidence: 99%

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High Temperature Mechanical Properties and Wear Performance of B4C/Al7075 Metal Matrix Composites

Shin

Lee

et al. 2019

Metals

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In this study, high volume fraction B 4 C reinforced Al matrix composites were fabricated with a liquid pressing process. Microstructural analysis by scanning electron microscope and a transmission electron microscopy shows a uniform distribution of the B 4 C reinforcement in the matrix, without any defects such as pore and unwanted reaction products. The compressive strength and wear properties of the Al7075 matrix and the composite were compared at room temperature, 100, 200, and 300 • C, respectively. The B 4 C reinforced composite showed a very high ultimate compression strength (UCS) over 1.4 GPa at room temperature. The UCS gradually decreased as the temperature was increased, and the UCS of the composite at 300 • C was about one third of the UCS of the composite at room temperature. The fractography of the compressive test specimen revealed that the fracture mechanism of the composites was the brittle fracture mode at room temperature during the compression test. However, at the elevated temperature, AMCs had a mixed mode of a brittle and ductile fracture mechanism under the compressive load. The composite produced by a liquid pressing process also showed superior wear resistance compared with the Al matrix. The result of the wear test indicates that the wear loss of the Al matrix at 300 • C was two times higher than that of the AMCs, which is attributed to the formation of a mechanically mixed layer (MML) in the composites at the high temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High Temperature Mechanical Properties and Wear Performance of B4C/Al7075 Metal Matrix Composites

Shin

Lee

et al. 2019

Metals

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“…The compressive property is one of the important properties of metal foam [ 2 ]. It is generally accepted that the compressive property relies on many factors, such as the relative density and porosity [ 3 , 4 ], the property of cell wall material [ 5 , 6 ], cell wall microstructure [ 7 , 8 , 9 ], the testing temperature [ 10 , 11 , 12 ] and surface coating on the foam [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, these experiments mentioned above mainly described the mechanical properties of the hybrid foams at room temperature, but limited experimental data at elevated temperature were available. It is generally accepted that the mechanical properties of metal foam are strongly dependent on the testing temperature [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Compressive Properties of Open-Cell Al Hybrid Foams at Different Temperatures

Liu

Zhu

et al. 2017

Materials

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Hybrid Ni/Al foams were fabricated by depositing electroless Ni–P (EN) coatings on open-cell Al foam substrate to obtain enhanced mechanical properties. The microstructure, chemical components and phases of the hybrid foams were observed and analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD), respectively. The mechanical properties of the foams were studied by compressive tests at different temperatures. The experiment results show that the coating is mainly composed of Ni and P elements. There was neither defect at the interface nor crack in the coatings, indicating that the EN coatings had fine adhesion to the Al substrate. The compressive strengths and energy absorption capacities of the as-received foam and hybrid foams decrease with the increasing testing temperatures, but the hybrid foams exhibit a lower decrement rate than the as-received foam. This might be attributed to the different failure mechanisms at different testing temperatures, which is conformed by fractography observation.

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“…The research mentioned above was mainly focused on ductile metal foams. In the work of Liu et al [12] the compressive properties of Al-Si-SiC brittle composite foams at different temperatures were studied from room temperature (25 • C) to elevated temperature (200 and 400 • C). They observed brittle-type fracture mode at room temperature, but when the testing temperature increased up to 400 • C, the ductile-type fracture mode occurred.…”

Section: Introductionmentioning

confidence: 99%

High-temperature compression of closed cell aluminium foams

Kováčik¹,

Orovčík²,

Jerz³

2016

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The compression behaviour of closed cell aluminium foams (Al99.5, AlMg1Si0.6 and AlSi12 matrix alloys, TiH2 foaming agent) prepared by powder metallurgy was studied in the temperature range of 20-550 • C. It was observed that the temperature increase results in the decrease of the compression strength and energy absorption and increase of densification strain (plateau length) at constant density. The dependence of compression strength on foam density and temperature was successfully modelled using new proposed equation. The activation energy for compression of aluminium foams seems to be density dependent with a maximum at certain density range depending on foam composition. It was also found that the characteristic exponent T f for the compression strength of aluminium foams is temperature dependent variable. The strain at compression strength (deformation up to the macroscopic failure of foam) is nearly temperature independent or decreases at constant density depending on aluminium alloy matrix. The absorbed energy per unit volume of aluminium foams decreases with increasing temperature significantly due to the decrease in the value of plateau/compression strength at constant density.

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Compressive properties of Al-Si-SiC composite foams at elevated temperatures

Cited by 44 publications

References 17 publications

High Temperature Mechanical Properties and Wear Performance of B4C/Al7075 Metal Matrix Composites

High Temperature Mechanical Properties and Wear Performance of B4C/Al7075 Metal Matrix Composites

Compressive Properties of Open-Cell Al Hybrid Foams at Different Temperatures

High-temperature compression of closed cell aluminium foams

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