The Production-scale Squeeze Casting of Devitroceramic Fiber Reinforced Aluminum and its Mechanical Properties

Fukunaga, Hideharu; Komatsu, Shunsaku; Kanoh, Yoshinobu

doi:10.1299/jsme1958.26.1814

Cited by 21 publications

(2 citation statements)

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“…Research on this infiltration process has been described by several authors, particularly in Japan, where it is also used industri~ ally to produce metal~matrix composite parts. 5,11,12,15,18,[50][51][52][53][54][55][56][57][58][59][60][61][62] Other piston-driven pressure-infil~ tration processes, depicted in Figure 4b, are closer to die casting in that the piston pushes on the metal at a location separated from the die by a runner. 13 ,27,63-;;5 The piston surface does not shape the part with such machines.…”

Section: Piston-driven Equipmentmentioning

confidence: 99%

Pressure-infiltration processing of reinforced aluminum

Mortensen¹,

Michaud²,

Flemings³

1993

JOM

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Section: Piston-driven Equipmentmentioning

confidence: 99%

Pressure-infiltration processing of reinforced aluminum

Mortensen¹,

Michaud²,

Flemings³

1993

JOM

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“…Ehrstrom and Kool 10 and Li 11 pointed out that increasing the solidification speed and the cooling speed may weaken or even suppress the particle pushing effect in rapid solidification processing of composites. Fulcunaga et al, 12 confirmed that, under the condition of rapid solidification, there exists a critical speed at which the transition from pushing to trapping occurs. From Fig.…”

mentioning

confidence: 95%

Microstructural characteristics of TiC-reinforced composite coating produced by laser syntheses

1999

J. Mater. Res.

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An in situ method has been developed to produce a Ni alloy composite coating reinforced by in situ reacted and gradiently distributed TiC particles by one-step laser cladding. The dispersed, ultrafine TiC particles in the coating are observed. Most of TiC particles, evidently with a gradient distribution, are uniformly distributed within interdendritic regions due to the trapping effect of advanced solid-liquid interface. The TiC/␥-Ni interface is clean and free from deleterious surface reactions. The microhardness of the coating also has a gradient variation, with the highest value being 1250 Hv 0.2.Ceramic particle-incorporation to provide a metal matrix composite (MMC) coating by laser cladding is a newly developed technique, in which the alloy powders of a desirable composition and a thin surface layer of the substrate materials are simultaneously melted and then rapidly solidified to form a dense coating that is metallurgically bonded to the base material. Some ceramicalloy systems, such as SiC/Co-Cr-W, WC/Ni-Cr-Si-B, and TiC (TiN, TiB)/Ni-based alloys, synthesized on traditional substrate materials, have been studied. 1-3The aim of this communication is to synthesize an in situ TiC dispersoid in a Ni alloy coating. A new method of in situ formation of TiC with a gradient distribution by one-step laser cladding is proposed. TiC particles are introduced by an in situ reaction of titanium and graphite during a laser clad process, instead of TiC particles being directly added into the laser molten pool.A power mixture of Ni alloy, titanium (99.7% purity), and crystalline graphite (99.5% purity) is used as the coating alloy. The volume fraction of titanium-graphite powders is 30%. The titanium-carbon powder ratio corresponds to that of stoichiometric TiC. The average sizes of titanium and graphite powders are 2 and 4 m, respectively. The Ni alloy powder possesses an average size of 28 m, and its chemical composition (wt%) is 16 Cr, 3.5 B, 4.5 Si, 0.8 C, and the balance is nickel. The substrate material is 5 CrMnMo steel in a quenched and tempered condition.Laser cladding is carried out with a 3-kW continuous wave CO 2 laser to produce a series of single clad tracks without overlap. The processing parameters are 4-15 mm/s beam scanning speed, 3-mm beam diameter and 2-kW laser power. The mixed powders are painted on the substrate with a thickness of about 0.8 mm. Surface oxidation is prevented by argon.The morphology, microstructure, and interface structure are observed with a Neuphot21 optical microscope, a Hitachi S570 scanning electron microscope (SEM), a Philips CM12 transmission electron microscope (TEM), and a Hitachi 9000 high-resolution electron microscope (HREM). The volume fraction of TiC particles in the coating is measured by a computerized image analysis method. Microhardness measurements are obtained with a Vickers hardness tester using a 0.2-kg load. Figure 1 shows the optical micrograph of a cross section of the composite coating. The bond area between the clad coating and the substrate is an 8-m-...

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Aluminum Metal Matrix Composites by Reactive and Semi‐Solid Squeeze Casting

Fukunaga

2005

ChemInform

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The Production-scale Squeeze Casting of Devitroceramic Fiber Reinforced Aluminum and its Mechanical Properties

Cited by 21 publications

References 0 publications

Pressure-infiltration processing of reinforced aluminum

Pressure-infiltration processing of reinforced aluminum

Microstructural characteristics of TiC-reinforced composite coating produced by laser syntheses

Aluminum Metal Matrix Composites by Reactive and Semi‐Solid Squeeze Casting

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