Aluminum‐Based Alloys

Murakami, Yôtarô

doi:10.1002/9783527603978.mst0083

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…From the viewpoint of achieving weight saving, use in home appliances and automobile parts has been increasing in recent years. Currently, many magnesium products are manufactured by forging or casting [6]- [10]. Semi-solid forging has advantages of forging semi-solid slurry, so that the forming load is small and dimensional accuracy is better than conventional forging and casting.…”

Section: Introductionmentioning

confidence: 99%

Semi-Solid Forging of Mg Alloy AZX1311 and Mechanical Properties

Nishida

Hagiwara

Tsunoda

et al. 2020

KEM

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This paper describes basic property in semi-solid forging method of magnesium alloy AZX1311. In the semi-solid forging process, an arbitrary fraction of solid is selected at a temperature between the liquidus and the solidus line and rapidly cooled and coagulated simultaneously with deformation of the material in a die to obtain a product. In addition, the magnesium alloy AZX1311 has excellent castability and mechanical properties. In recent years, the use of magnesium alloys for home electric appliances and automotive parts has been increasing because weight reduction can be achieved. These main manufacturing methods are casting and forging. However, these manufacturing methods have disadvantages such as large forming load and poor dimensional accuracy. Therefore, the semi-solidification forging method can improve these disadvantages. In this study, a forged semi-solid material and air cooled semi-solid material were produced using a servo press machine. Focused on impurities, porosity and microstructure. A forged semi-solid material could be produced. A semi-solid structure could be observed.

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Section: Introductionmentioning

confidence: 99%

Semi-Solid Forging of Mg Alloy AZX1311 and Mechanical Properties

Nishida

Hagiwara

Tsunoda

et al. 2020

KEM

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“…A composite can be defined as a material system composed of a mixture or combination of two or more micro or macroconstituents (that differ in form and chemical composition, and are essentially insoluble in each other), which possesses properties that are superior to, or important in some other manner than the properties of the individual components [2]. In other words, composite materials are the combination of two or more chemically different monolithic materials in order to produce a third material which has unique properties when compared to the monolithic material's properties [3].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Alumina Particle Size on Sintered Density and Hardness of Discontinuous Reinforced Aluminum Metal Matrix Composite

Ahmad¹,

Jamaluddin²,

Hussain³

et al. 2012

Jurnal Teknologi

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Kertas kerja ini melaporkan kesan saiz partikel alumina (Al2O3) terhadap sifatâ€“sifat komposit matriks logam aluminium (KML) difabrikasi melalui kaedah metalurgi serbuk. Serbuk campuran dipadatkan pada tekanan 250 MPa dan disinter pada suhu 600Â°C selama 5 jam. Sampel KML dihasilkan berdasarkan 10% berat Al2O3. Artikel ini akan membincangkan kesan saiz partikel alumina terhadap mikrostruktur, ketumpatan jasad sinter dan kekerasan komposit. Ketumpatan komposit yang telah disinter adalah dalam julat 2.78 gcmâ€“3 hingga 2.84 gcmâ€“3. Kesan saiz partikel Al2O3 (0.3 Î¼m, 1.0 Î¼m, 3.0 Î¼m, 12.5 Î¼m dan 25.0 Î¼m) ke atas mikrostruktur komposit diperhatikan menggunakan Mikroskop Imbasan Elektron. Nilai kekerasan diukur menggunakan penguji mirokekerasan Vickers. Pemerhatian menunjukkan bahawa partikel penguat halus (0.3 Î¼m) memberikan nilai kekerasan yang tertinggi (70.1 Hv). Partikel alumina yang halus akan mewujudkan penghalang terhadap kehelan yang lebih efisien di dalam komposit aluminium. Komposit yang diperkuat dengan saiz partikel yang kecil mempunyai bilangan penghalang per unit isipadu yang tinggi berbanding dengan komposit yang diperkuat dengan partikel yang bersaiz besar pada peratus berat penguat yang sama. Kata kunci: Komposit matriks logam, matriks aluminium, alumina, saiz partikel, metalurgi serbuk This paper reports the effect of alumina (Al2O3) particle size on the properties of aluminum metal matrix composite (MMC), fabricated via powder metallurgy route. Mixture powders were compacted at 250 MPa and sintered at 600Â°C for 5 hours. The MMC samples were prepared based on 10 wt% of Al2O3. This paper will discuss the effect of alumina particle size on microstructure, sintered density and hardness of the composite. The densities of sintered composites were in the range of 2.78 gcmâ€“3 to 2.84 gcmâ€“3. The effect of Al2O3 particles sizes (0.3 Î¼m, 1.0 Î¼m, 3.0 Î¼m, 12.5 Î¼m and 25.0 Î¼m) on the microstructure of the composites were observed using Scanning Electron Microscope (SEM). The hardness value was measured using Vickers microhardness tester. It is observed that the finest reinforcement particle size (0.3 Î¼m) gave the highest hardness value (70.1 Hv). The finer Al2O3 particles will provide more efficient barriers to dislocation flow in aluminum matrix. Composites reinforced with the smallest particle size have higher number of barriers per unit volume compared with composites reinforced with larger particle size at the same weight percentage. Key words: Metal matrix composite, aluminum matrix, alumina, particle size, powder metallurgy

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Powder metallurgy of Al-based matrix composites reinforced with quasicrystalline particles

Scudino

2018

Intermetallic Matrix Composites

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Aluminum‐Based Alloys

Cited by 3 publications

References 43 publications

Semi-Solid Forging of Mg Alloy AZX1311 and Mechanical Properties

Semi-Solid Forging of Mg Alloy AZX1311 and Mechanical Properties

The Influence of Alumina Particle Size on Sintered Density and Hardness of Discontinuous Reinforced Aluminum Metal Matrix Composite

Powder metallurgy of Al-based matrix composites reinforced with quasicrystalline particles

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