Macrosegregation in indirectly squeeze cast Al-0.9wt%Si

Rølland, Tone; Schmidt, Roman; Arnberg, L.; Thorpe, W.R.

doi:10.1016/0921-5093(96)10209-4

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…However, achievement of a homogeneous distribution of reinforcing secondary particles throughout the matrix microstructure is quite difficult by traditional casting methods. Besides, sub-micron reinforcement particles tend to agglomerate in the molten metal during the production of metal matrix composites [4,5].…”

Section: Introductionmentioning

confidence: 99%

Characterization Investigations of a Al-5 wt.% Si/2 wt% (NbB<sub>2</sub>, NbC) Hybrid Composite Fabricated via Mechanically Alloying and Sequentially Milling (Mechanical Alloying + Cryomilling)

Öveçoğlu

Tekoğlu

Mertdinç

et al. 2018

KEM

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In this study, microstructural and mechanical properties of a Al-5 wt.% Si/2 wt% (NbB2, NbC) composite synthesized by sequentially milling (mechanical alloying (MA) and/or cryogenic milling (CM)) were investigated. Nb2O5, B2O3 and C powder blends were milled using high energy milling for 5 h and annealed at 1400 oC for 12 h to produce NbB2-NbC hybrid powders. The NbB2-NbC hybrid powders were mixed with the matrix Al-5 wt.% Si powders to constitute the Al-5 wt.% Si/2 wt.% (NbB2-NbC) powders blends which were mechanically alloyed (MA'd) for 4 h using SpexTM Mixer/Mill, cryo-milled for 10 min in a SpexTM 6870 Freezer/Mill and finally MA’d for 1h in SpexTM Mixer/Mill again. As-blended, MA’d and cryomilled powders were compacted in a hydraulic press with a uniaxial pressure of 450 MPa. Compacted samples were sintered at 570°C for 2 h under Ar gas atmosphere. Microstructural characterizations of the as-blended/MA'd powders and the sintered composites were performed using X-ray diffractometry (XRD) and scanning electron microscopy (SEM) techniques. Density and microhardness measurements and sliding wear tests were performed on the sintered composite samples. Sequentially milled and sintered Al-5 wt.% Si-2 wt.% (NbB2-NbC) samples had the highest mean microhardness value (2.29 ± 24.98 GPa) and the lowest wear volume loss (0.038 mm3).

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Section: Introductionmentioning

confidence: 99%

Characterization Investigations of a Al-5 wt.% Si/2 wt% (NbB<sub>2</sub>, NbC) Hybrid Composite Fabricated via Mechanically Alloying and Sequentially Milling (Mechanical Alloying + Cryomilling)

Öveçoğlu

Tekoğlu

Mertdinç

et al. 2018

KEM

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show abstract

“…However, to reach a homogeneous distribution throughout the composite structure is very hard by traditional casting methods. Besides, sub-micron reinforcement particles tend to agglomerate in the molten metal during the production of metal matrix composites [4,5].…”

Section: Introductionmentioning

confidence: 99%

Effect of NbB2 Addition on the Microstructure and Mechanical Properties of Mechanically Alloyed Al-12.6Si Alloys

Tekoğlu¹,

Mertdinç²,

Gökçe³

et al. 2016

World Congress on Mechanical, Chemical, and Material Engineering

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This study reports the effect of NbB2 particles on the Al-12.6 wt.% Si matrix powders and composites in regard of physical, microstructural and mechanical properties. In order to obtain hybrid powders, Al-12.6 wt.% Si-2 wt.% NbB2 blends were mechanically alloyed (MA'd) for various durations (1, 4 and 8 h ) in a Spex™ Mixer/Mill using hardened steel vial/balls with a 7/1 ball-to-powder weight ratio. A hydraulic press with a uniaxial pressure of 450 MPa was used for the compaction of the as-blended/MA'd powders. Green compacts were sintered at 570°C for 2 h under Ar gas atmosphere. X-ray diffractometry (XRD) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) techniques were utilized for the microstructural characterization of the as-blended/MA'd powders and the sintered composites. Differential scanning calorimetry (DSC) analyses were also conducted on the powder products. Sintered samples were characterized by density and Vickers microhardness measurements and sliding wear tests. With increasing MA time, mechanical improvement in composite properties was observed. Reinforcing particles had positive effect on the mechanical properties of the matrix: Al-12.6 wt.% Si-2 wt.% NbB2 MA'd for 4 h showed higher microhardness value (158.50±10.02 MPa) and lower wear volume loss (0.161 mm 3 ) than those of Al-12.6 wt.% Si matrix MA'd for 4 h. Al-12.6 wt.% Si matrix MA'd for 4 h showed microhardness value (146.70±8.81 MPa) and wear volume loss (0.194 mm 3 ).

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The Challenge and Progress in Macro- and Micro-modeling and Simulation of Squeeze Casting Process

Ma,

Han,

Sachdev

et al. 2024

Metall Mater Trans A

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Macrosegregation in indirectly squeeze cast Al-0.9wt%Si

Cited by 7 publications

References 2 publications

Characterization Investigations of a Al-5 wt.% Si/2 wt% (NbB<sub>2</sub>, NbC) Hybrid Composite Fabricated via Mechanically Alloying and Sequentially Milling (Mechanical Alloying + Cryomilling)

Characterization Investigations of a Al-5 wt.% Si/2 wt% (NbB<sub>2</sub>, NbC) Hybrid Composite Fabricated via Mechanically Alloying and Sequentially Milling (Mechanical Alloying + Cryomilling)

Effect of NbB2 Addition on the Microstructure and Mechanical Properties of Mechanically Alloyed Al-12.6Si Alloys

The Challenge and Progress in Macro- and Micro-modeling and Simulation of Squeeze Casting Process

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