Blended powder semisolid forming of Al7075/Al2O3 composites: Investigation of microstructure and mechanical properties

Javdani, Akbar; Pouyafar, Vahid; Ameli, Amir; Volinsky, Alex A.

doi:10.1016/j.matdes.2016.07.042

Cited by 31 publications

(5 citation statements)

References 53 publications

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“…They succeeded in producing a single-crystal powder coated with Pb-Sn eutectic during continuous stirring and cooling processes. Javdani et al [4] fabricated Al7075/Al 2 O 3 composites by blending different sizes and weight fractions of Al 2 O 3 particles with matrix particles using a planetary ball mill and then compacting them to a semi-solid state under different pressures. Increasing the size of the reinforcing particles and applied pressure resulted in increased density and hardness.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of AZ91D/SiCp composites by mechanical milling of magnesium alloy chips and spark plasma sintering in a semi-solid regime

Nikmardan

Pouyafar

2019

Journal of Asian Ceramic Societies

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In the present study, the capability of spark plasma sintering (SPS) in a semi-solid regime to produce AZ91D/SiCp composites, prepared by mechanical milling (MM), was investigated. An SPS process was used to densify AZ91D/SiCp composite powders by heating them to a semi-solid temperature of 497°C or 516°C, at a heating rate, holding time and pressure of 50°C/min, 1 min and 40 MPa, respectively. In preparing the requisite powders, MM was used as an effective recycling method to prevent excessive consumption of energy and raw materials while converting magnesium alloy chips into powder in a planetary ball mill. The simultaneous effects of milling parameters (time and ball-to-powder weight ratio (BPRs)) on the MM powder were investigated by FESEM and PSA. Mechanical alloying (MA) of the milled powder with 40 wt% −2 µm SiC and characterization of the obtained powder by OM and PSA were also carried out. The phase compositions of the powder and sintered samples were analyzed by XRD. The microstructure, density, hardness and compressive strength of the sintered samples were also studied. The results show that composites with few porosities and good mechanical properties were prepared by SPS in a semi-solid regime.

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Section: Introductionmentioning

confidence: 99%

Fabrication of AZ91D/SiCp composites by mechanical milling of magnesium alloy chips and spark plasma sintering in a semi-solid regime

Nikmardan

Pouyafar

2019

Journal of Asian Ceramic Societies

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“…1 In general, AMCs are fabricated using three different routes of solid, liquid, and semisolid state processing. 2 Various material types ranging from a conventional ceramic reinforcing phase to more unusual reinforcements, particularly fly ash, natural minerals, 3 complex metallic, quasicrystals, nanocrystalline, partially amorphous alloys, and amorphous alloys/metallic glass have been used as reinforcing composites successfully. 4 During the past decade, glassy particles as a novel reinforced phase in AMCs have attracted widespread interest.…”

Section: Introductionmentioning

confidence: 99%

“…As is well known, PM technology is a complex and high cost process, and unsuitable for fabricating large-sized parts with complex geometry. 2 To successfully apply amorphous alloys as reinforcement, accurately thermal condition controlling, suitable selection of reinforcing and matrix materials are needed. Subsequently, the use of glassy particles with high crystallization temperatures provides processing the AAMC at higher temperatures without running the risk to induce amorphous crystallization.…”

Section: Introductionmentioning

confidence: 99%

“…Semisolid state processing methods are an effective and attractive near net shape forming process to manufacture components with complex shapes. 2 In recent years, semisolid powder forming has attracted increasing interest. Powder thixoforming develops the thixoforming process by replacing the bulk material with powdered material, enabling exploitation of PM benefits, particularly in producing metal matrix composites with uniform reinforce distribution.…”

Section: Introductionmentioning

confidence: 99%

“…26 Generally, powder thixoforming was extensively used to produce low melting metal, especially Al alloys 27–33 and AMCs. 2,26,34–40…”

Section: Introductionmentioning

confidence: 99%

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Feasibility study of a novel method for production of glassy reinforced composite Al–Ni₆₀Nb₄₀ of powder thixoforging

Nouri

Sedighi

Minouei

2018

Journal of Composite Materials

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In the present study, the semisolid forming has been proved to be effective in fabricating amorphous reinforced aluminum matrix composite of high quality with appreciable mechanical properties. In other words, the Ni60Nb40 glassy reinforcement in 520.0 aluminum matrix composite was successfully fabricated via powder thixoforging without altering the glassy nature. Most prior studies are focused on solid state (powder metallurgy). Subsequently, the use of glassy particles with high crystallization temperatures provides processing the composite at higher temperatures. Considering the powder thixoforming benefits, we open a door to another way of manufacturing high-efficient amorphous reinforced metal matrix composite with brilliant mechanical properties. In monolithic matrix, the alloy produced via powder thixoforging hardness and compression yield strength reached 223(HV) and 747 MPa compared to as cast condition increase of 116% and 228%, respectively. Additionally, this significant mechanical strength was combined with a brilliant fracture strain of 40%. Moreover, the 30 vol.% glassy reinforced composite possess hardness, compression yield strength, and fracture strain of 311(HV), 875 MPa, and 13%, respectively. All produced specimens reached near full density over 99% relative density, leading to a considerable combination of superior strength and ductility. Significantly, the SYS of powder thixoforging samples significantly increased from 89 kN m kg−1 for as cast condition to 290, 238, 220, and 199 kN m kg−1 for the monolithic and amorphous reinforced Al matrix composites of 12, 20 and 30 vol.%.

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Influence of Tungsten Nanoparticles on the Structure and Mechanical Behavior of AA5056 Under Quasi-static Loading

et al. 2022

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Blended powder semisolid forming of Al7075/Al2O3 composites: Investigation of microstructure and mechanical properties

Cited by 31 publications

References 53 publications

Fabrication of AZ91D/SiCp composites by mechanical milling of magnesium alloy chips and spark plasma sintering in a semi-solid regime

Fabrication of AZ91D/SiCp composites by mechanical milling of magnesium alloy chips and spark plasma sintering in a semi-solid regime

Feasibility study of a novel method for production of glassy reinforced composite Al–Ni₆₀Nb₄₀ of powder thixoforging

Influence of Tungsten Nanoparticles on the Structure and Mechanical Behavior of AA5056 Under Quasi-static Loading

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Blended powder semisolid forming of Al7075/Al2O3 composites: Investigation of microstructure and mechanical properties

Cited by 31 publications

References 53 publications

Fabrication of AZ91D/SiCp composites by mechanical milling of magnesium alloy chips and spark plasma sintering in a semi-solid regime

Fabrication of AZ91D/SiCp composites by mechanical milling of magnesium alloy chips and spark plasma sintering in a semi-solid regime

Feasibility study of a novel method for production of glassy reinforced composite Al–Ni60Nb40 of powder thixoforging

Influence of Tungsten Nanoparticles on the Structure and Mechanical Behavior of AA5056 Under Quasi-static Loading

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Feasibility study of a novel method for production of glassy reinforced composite Al–Ni₆₀Nb₄₀ of powder thixoforging