Microstructure and mechanical properties of Al–20Si–5Fe–2X (X=Cu, Ni, Cr) alloys produced by melt-spinning

Rajabi, Mohammad; Simchi, A.; Davami, P.

doi:10.1016/j.msea.2008.03.047

Cited by 44 publications

(14 citation statements)

References 17 publications

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“…Particularly, the Lipton-Kurz-Trivedi (LKT) [5] and Trivedi-Magnin-Kurz (TMK) [6] models have been purposed for dendrite and eutectic growths, respectively. Although processing of Al-20Si-5Fe alloy by gas atomization [7][8] and melt-spinning [9] has been studied in detail and the microstructural features have been examined, assessing the effect of cooling rate based on the solidification models and linking it to the mechanical properties have been considered in limited extent. Particularly, the microstructural changes during the consolidation stage and evaluation of the relationship between the microstructure and mechanical strength have been performed scarcely.…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution of Al-20Si-5Fe alloy during rapid solidification and hot consolidation

et al. 2009

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Al-20Si-5Fe melt was rapidly solidified into particles and ribbons and then consolidated to near full density by hot pressing at 400°C/250 MPa/1 h. According to the eutectic-growth and dendritic-growth velocity models, the solidification front velocity and the amount of undercooling were estimated for the particles with different sizes. Values of 0.43-1.2 cm/s and 15-28 K were obtained. The secondary dendrite arm spacing revealed a cooling rate of 6 × 10 5 K/s for the particles with an average size of 20 μm. Solidification models for the ribbons yielded a cooling rate of 5 × 10 7 K/s. As a result of the higher cooling rate, the melt-spun ribbons exhibited considerable microstructural refinement and modification. The size of the primary silicon decreased from approximately 1 μm to 30 nm while the formation of iron-containing intermetallic compounds was suppressed. Supersaturation of the aluminum matrix in an amount of ~7 at.% Si was noticed from the XRD patterns. During the hot consolidation process, coarsening of the primary silicon particles and precipitation of β-Al 5 FeSi phase were observed. Evaluation of the compressive strength and hardness of the alloy indicated an improvement in mechanical properties due to the microstructural modification.

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Section: Introductionmentioning

confidence: 99%

Microstructural evolution of Al-20Si-5Fe alloy during rapid solidification and hot consolidation

et al. 2009

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“…In our opinion, the presence of excess Ce also makes the melting of Al matrix be very unstable at the holding temperature and tend to melt quickly. The sudden and homogeneous melting of ribbons will consume the energy of the Al liquid in the vicinity of the ribbon, and induce an instant large undercooling, which is beneficial for the nucleation of Al upon the surface of CeB 6 .…”

Section: Discussionmentioning

confidence: 99%

“…To improve the grain refining efficiency of inoculation, many methods and strategies have been proposed, including chemical modification [3], rapid solidification [4][5][6][7][8], and ultrasonic processing [9], etc. Meanwhile, many theoretical and experimental investigations have aimed at revealing the procedure when inoculants are added to melts [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we used an arc-melt-spinning technique to prepare an in situ CeB 6 /Al inoculant and showed that it is very effective for refining aluminum [25]. We also developed a low-temperature synthesis method to optimize this inoculant and found that the melt-spun inoculant contains sub-micron CeB 6 clusters and low-melting-point Al-Ce phase [26].…”

Section: Introductionmentioning

confidence: 99%

“…We also developed a low-temperature synthesis method to optimize this inoculant and found that the melt-spun inoculant contains sub-micron CeB 6 clusters and low-melting-point Al-Ce phase [26]. To examine the refining effect of this inoculant under more casting conditions, we did the inoculation experiment under different holding time that is considered an important parameter to measure the performance of the inoculant [27,28].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cooling Rate on Microstructure and Grain Refining Behavior of In Situ CeB6/Al Composite Inoculant in Aluminum

Liu

Cui

Wang

et al. 2017

Metals

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Abstract:Melt spinning was performed to process an in situ CeB 6 /Al inoculant at different rotating speeds to investigate the influence of cooling rate on the grain refining behavior of inoculants. It has been found that a high cooling rate caused two obvious changes in the inoculant: the supersaturated solid solution of Ce in the α-Al matrix and the miniaturization of CeB 6 particles. At high cooling rates of~10 8 K/s, the Ce content is largely beyond the theoretical solid solubility of Ce in Al, and the size of the CeB 6 particles in ribbons is reduced to~100 nm. The grain refining effect of melt-spun CeB 6 /Al composite inoculant shows significant dependence on holding time of which the best value should be no more than 2 min. The excellent grain refinement of the inoculant can be attributed to the combined effect of the nano-sized refiner particles and the large undercooling caused by the sudden melting of supersaturated Al-Ce solution.

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Microstructure, thermal and radiation shielding properties of aluminium‐silicon‐boron alloy prepared by mechanical alloying

Yaykaşlı,

Eskalen,

Göğebakan

et al. 2024

Materialwissenschaft Werkst

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This study focused on developing microstructural, thermal, and radiation shielding changes in Al50Si25B25 powders using mechanical alloying techniques. Based on the x‐ray powder diffraction data, the crystallite size and microstrain of the 100‐hours milled powder were calculated as 0.25 nm and 50.33 %, respectively. The solubility of silicon in the α‐aluminium matrix increased with longer mechanical alloying duration. Transmission electron microscope analyses further showed that the alloy particulates had an average size of 3 μm and an average grain size of 0.226 nm. The radiation shielding properties of the Al50Si25B25 powders indicated that the Linear Attenuation Coefficient value increased from 0.0554±0.1689 cm−1 to 1.0632±0.2425 cm−1 with an increase in the thickness of the Al50Si25B25 alloy. This work successfully demonstrated the potential of mechanical alloying techniques to enhance the microstructural and thermal properties of Al50Si25B25 powders. It highlighted their effectiveness in providing radiation shielding capabilities when varying the thickness of the alloy.

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Microstructure and mechanical properties of Al–20Si–5Fe–2X (X=Cu, Ni, Cr) alloys produced by melt-spinning

Cited by 44 publications

References 17 publications

Microstructural evolution of Al-20Si-5Fe alloy during rapid solidification and hot consolidation

Microstructural evolution of Al-20Si-5Fe alloy during rapid solidification and hot consolidation

Effect of Cooling Rate on Microstructure and Grain Refining Behavior of In Situ CeB6/Al Composite Inoculant in Aluminum

Microstructure, thermal and radiation shielding properties of aluminium‐silicon‐boron alloy prepared by mechanical alloying

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