Compression fatigue properties of open-cell aluminum foams fabricated by space-holder method

Yang, Xudong; Hu, Qi; Du, Juan; Song, Hang; Zou, Tianchun; Sha, Junwei; He, Chunnian; Zhao, Naiqin

doi:10.1016/j.ijfatigue.2018.11.008

Cited by 49 publications

(33 citation statements)

References 35 publications

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“…Taking k = 0.8 as a typical case, the three different stages of the specimens are also shown in Figure . The ε ‐ N curves of both Al and AMCFs go through three stages: (I) the elastic stage, the strain accumulates rapidly within several hundreds of cycles; (II) the hardening stage, the strain increases slowly within a large number of cycles; (III) the rapid failure stage, the strain accumulates very rapidly . It is noteworthy that the difference of fatigue curves between Al foams and AMCFs is clear.…”

Section: Resultsmentioning

confidence: 99%

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Yang

et al. 2020

Fatigue Fract Eng Mat Struct

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The compression‐compression fatigue performance of carbon nanotube (CNT) reinforced aluminium matrix composite foams (AMCFs) were investigated. The ε‐N curves of AMCFs are composed of three stages (the elastic, strain hardening, and rapid accumulation stages), while the fatigue strain of AMCFs accumulates very rapidly in stage III compared with Al foams. The fatigue strength of AMCFs with CNT contents of 2.0, 2.5, and 3.0 wt% increases by 6%, 44%, and 102% than Al foams, respectively. Different from Al foams' deformation of layer‐by‐layer, the main failure modes of AMCFs are the brittle fracture and collapse of pores within significant shear deformation bands under fatigue loading. The uniform distribution of CNTs and good interfacial bonding of CNTs and Al matrix is the important factor for the improvement of fatigue properties of AMCFs.

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Section: Resultsmentioning

confidence: 99%

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Yang

et al. 2020

Fatigue Fract Eng Mat Struct

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“…Among the various open-cell metal foams with high thermal/electrical conductivity and liquid/gas permeability, aluminum foams have emerged as promising material in areas such as heat exchangers, filters, catalyst carriers, and electrodes in aluminum-air batteries due to low cost, relatively easy manufacturing of required functional geometries, and better mechanical properties compared to other low melting metals [14,15,16,17,18,19]. The most widespread methods to produce open-cell metal foams are investment casting, casting around hollow spheres, metal injection molding, and space holder casting [20,21,22,23]. However, there are some weaknesses as a non-uniform cellular structure which depends on the shape of space holders [24], relatively low specific surface area of foams and high production cost and high complexity of manufacturing processes [21,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

Open-Cell Aluminum Foams by the Sponge Replication Technique

2019

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Open-cell aluminum foams were manufactured by a sponge replication technique having a total porosity of ~90%. The influence of the thermal processing conditions such as atmosphere and temperature on the cellular structure, phase composition porosity, thermal conductivity, and compressive strength of the foams was studied. It was found that the thermal processing of aluminum foams in Ar at temperatures up to 800 °C led to aluminum foams with a reduced strut porosity, a lower amount of aluminum oxide, a higher thermal conductivity, and a higher compression strength, compared to foams thermally processed in air. These results were explained by the lower amount of aluminum oxide after thermal processing of the foams.

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“…Actually, the pore properties such as the porosity and pore morphology can be tailored by the space holder method, which had been confirmed in our previous work. [14,15,27] The porosity (P) of the as-prepared Al-Mg-Si alloy foams was controlled to 60%, and was calculated by…”

Section: Experimental Section 21 Fabrication Of the Al-mg-si Alloy mentioning

confidence: 99%

Effect of Heat Treatment on the Microstructure, Compressive Property, and Energy Absorption Response of the Al–Mg–Si Alloy Foams

Yang

Cheng

et al. 2020

Adv Eng Mater

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As one of the typical cellular materials, aluminum (Al) foams are regarded as the excellent energy absorber because they can effectively dissipate considerable energy through the way of large plastic deformation when subjected to quasi-static or dynamic loading. [1,2] Meanwhile, compared to the polymer foam materials, the Al foams can be used in relatively hightemperature environments such as the cooling system of gas and steam turbines and the heat shielding for aircraft exhaust. [3] The huge potential of Al foams in the fields of electronic, shipping, and aerospace is the main motivation to further explore its high-temperature properties. However, although the Al foams have these outstanding features and broad application prospects, the low-mechanical strength to a large extent still limits its utilization. Therefore, improving the mechanical strength and energy absorption ability of the Al foams is such necessary. Generally, the mechanical strength of Al foams can be improved by four approaches. The first one is about optimizing the pore structure related parameters, such as the pore distribution, pore size, and pore shape. [4] The second one is adding some microalloying elements into the pure Al foam to prepare Al alloy foams. [5] The third one is preparing Al matrix composite foams (AMCFs) through the addition of various kinds of reinforcements, such as ceramic particles, [6-10] whiskers, [11] and nanocarbon materials. [12-16] The fourth one is improving the strength of the individual struts of open-cell foams by a hard coating. [17-19] Nevertheless, in comparison with the preparation of AMCFs and electrochemical coating, the former two approaches are more low cost and easier to operate. Especially for the second approach, it is more suitable to be extended to the engineering application. Similar to the dense Al alloys, when applying appropriate heat treatment techniques, e.g., age precipitation and annealing, the mechanical property of the Al alloy foams can also be obviously enhanced. [20-24] Banhart et al. [20] found that the strengths of fully heat-treated 6061 alloy foams exhibited 60-75% higher than those of untreated foams. Zhou et al. [21] investigated the effect of heat treatment on compressive deformation behavior of the Duocel Al foams in

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Compression fatigue properties of open-cell aluminum foams fabricated by space-holder method

Cited by 49 publications

References 35 publications

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Open-Cell Aluminum Foams by the Sponge Replication Technique

Effect of Heat Treatment on the Microstructure, Compressive Property, and Energy Absorption Response of the Al–Mg–Si Alloy Foams

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