Cold Rolling and Mechanical Properties of Particle Reinforced Aluminum Composites

Kanetake, Naoyuki; Kaneko, Takahisa; Choh, Takao

doi:10.2320/jinstmet1952.61.11_1153

Cited by 5 publications

(1 citation statement)

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“…Anisotropy coming from the fabrication process and their corresponding microstructure are important aspects among these properties that need to be further investigated for PRMMC sheets (Kourkoulis and Andrianopoulos, 2000;Kourkoulis, 2002;Prasad et al, 2002). Specifically, Subramanian (1992, 1995), Kanetake et al (1997), and Euh and Kang (2005) investigated the effect of rolling process on the tensile properties of PRMMCs and indicted that rolling was associated with a considerable amount of damage to particles. Shamsul et al (1998) carried out a study of the relation of texture, microstructure and anisotropic mechanical properties of 2124Al/SiCp composites.…”

Section: Introduction P Article-reinforced Metal-matrix Composite (Prmentioning

confidence: 99%

Anisotropic Elastoplastic and Damage Behavior of SiCp/Al Composite Sheets

Skolnik

Liu

et al. 2008

International Journal of Damage Mechanics

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A combined experimental and modeling research is performed to study the anisotropic elastoplastic and damage responses of SiC particle-reinforced Al composite sheets. To investigate the effects of the composite processing, two sets of specimens cut from the heat-treated and as-rolled composite sheets are tested under uniaxial loading. The dependence of the strength, plastic flow, and strain ratios on the rolling angles are discussed in detail. To model the phenomena observed in the experiments, a micromechanics-based damage framework is further developed. The interfacial debonding and the rolling angle's effects are integrated into this model. Good consistency between the experimental results and the analytical predications demonstrates the validity of the theoretical model.

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Section: Introduction P Article-reinforced Metal-matrix Composite (Prmentioning

confidence: 99%

Anisotropic Elastoplastic and Damage Behavior of SiCp/Al Composite Sheets

Skolnik

Liu

et al. 2008

International Journal of Damage Mechanics

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Electromigration and the electroplastic effect in aluminum SiC MMCs

Dariavach

Rice

2000

JOM

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Transverse Rupture Strength for Grit No. of SiC Particulate (MPa) 1,000 (5 µm) 400 (25 µm) 240 (65 µm) 120 (105 µm) SiC (%)* No EP With EP No EP With EP No EP With EP No EP With EP INTRODUCTIONDiscontinuous-reinforced aluminum metal-matrix composites (MMCs) with ceramic whiskers and particle reinforcements (SiC and Al 2 O 3 ) can be combined to improve mechanical properties as compared with conventional aluminum alloys, resulting in increased tensile strength (up to 20%), increased Young's modulus (up to 40%), and improved mechanical properties at elevated temperatures. 1,2 At the same time, the low ductility of aluminum MMCs and the poor combination of a soft aluminum matrix with the high abrasive properties of ceramic-reinforced particles cause manufacture by forming or machining processes to be extremely difficult. Microstructural damage, such as microcracking, has been found during processes involving plastic deformation. Kanetake et al. [3][4][5] and Clyne and Whitehouse 6 have observed debonding at interfaces, particle fracture, and Young's modulus reduction during tensile loading. Kanetake, Ozaki, and Choh 4 have shown that decreased strength and increased ductility in aluminum MMCs resulting from microcracking occurred during forging.The application of high-density (greater than 10 3 A/mm 2 ) electric pulses for reducing flow stress during plastic deformation has been termed the electroplastic (EP) effect. [7][8][9][10][11] In practice, the application of the EP effect may be utilized to improve technological metal-forming processes for materials that are difficult to deform. [12][13][14] The present investigation was undertaken to evaluate the EP effect in sintered aluminum MMCs produced by powder-metallurgy (P/M) technology. Standard transverse rupture tests were performed to quantify changes in flow stress associated with the EP effect. RESULTSThe results of the TRS tests with and without the application of current pulses to the sintered compacts are displayed in Table I. The TRS of aluminum MMC-sintered compacts without the addition of electric pulses depends greatly on the particle size and volume fraction of SiC particles.The TRS for aluminum MMCs with 5 µm SiC particles decreases rapidly as the amount of SiC of this size is increased. This reduction in strength is due to incomplete sintering promoted by the difference in particle sizes of the SiC and the aluminum alloy. The coarser aluminum component is covered with fine SiC particles, which, to a large extent, prevents direct contact of aluminum particles during compaction and sintering. This negative effect increases as the volume percent of SiC increases. When the SiC particle size (25 µm) is close to that of aluminum, the TRS test results show that the maximum strength for aluminum MMCs with 5%, 10%, and 15% of SiC is larger than that with any other size SiC. Further increasing the SiC particle size decreased the TRS value. It must be noted that the behavior of 30% SiC MMC samples does not exhibit the expected trends. While the TRS trend increa...

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