Phase Field Simulation of Equiaxed Microstructure Formation during Semi-solid Processing of A380 Al Alloy

Das, Pratulananda; Samanta, Sudip Kumar; Kumar, Pramod; Dutta, Pradip

doi:10.2355/isijinternational.54.1601

Cited by 19 publications

(4 citation statements)

References 41 publications

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“…The temperature gradient and the concentration gradient of the slurry state decrease in the serpentine channel by means of self-stirring [21]. Similar simplified methods for slurry formation have been developed, such as the cooling slope [24][25][26], the cooling channel [27], and the ultrasonic treatment (UST) [28].…”

Section: Recent Developments In Slurry Formingmentioning

confidence: 99%

Semi-Solid Slurries for Rheocasting of Hypoeutectic Al-Si-X Alloys Produced by Self-Stirring in Serpentine Channels

Alfredo,

José Federico,

Aldo

et al. 2024

Metals

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Nowadays it is common to see the production of complex and critical automotive and aeronautical components reduced in weight for energy efficiency using light alloys with improved microstructural and mechanical properties. The casting processes involved in this trend are strong; in this study, an optimized design of a vertical serpentine channel and a novel design of a horizontal serpentine channel to produce semi-solid slurry (S2S) with thixotropic behavior by self-stirring for rheocasting of A380 and A356 alloys are tested. Simultaneously, chilling during solidification, flow development, and shearing on the alloys to improve the performance of solid fractions and self-stirring at high shear rate are applied. The effects of these conditions on the modification of the morphology transition of the α(Al) phase from dendrite to equiaxed grain are discussed. The results suggest the ability of the mentioned processes to promote the morphological transition of the primary solid due to the produced equiaxed grains of α(Al) phase having sizes between 25–50 µm from A380 alloy processed by vertical self-stirring. On the other hand, the treatment of the A356 alloy using the new horizontal serpentine channel produces equiaxed grains with an average size of 39 µm. Unexpected Si crystals, trapped in the α(Al) phase using both methods with both alloys, are detected. The applied operation parameters were aided by gravity-pouring close to the liquidus temperature, and the obtained microstructural results show the ability for S2S to form alongside thixotropic behavior and non-dendritic solidification by mean of self-stirring in the serpentine channels, suggesting the potential for further experiments under die-casting conditions.

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Section: Recent Developments In Slurry Formingmentioning

confidence: 99%

Semi-Solid Slurries for Rheocasting of Hypoeutectic Al-Si-X Alloys Produced by Self-Stirring in Serpentine Channels

Alfredo,

José Federico,

Aldo

et al. 2024

Metals

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“…¾ The developed 2D PF model deals with the anisotropic interfacial properties, which are described here via a vector which is normal to the solid-liquid as well as solid-solid interface . The anisotropic functions considered here in case of Face centered cubic (FCC) α-Al [17][18][19][20] and primary Mg2Si [23][24] grains are depicted below.…”

Section: Assumptionsmentioning

confidence: 99%

“…There is no literature available on mesoscopic simulation of microstructure formation of the above mentioned composite, at the best of authors knowledge on the topic. Earlier work on phase filed modelling of slurry microstructure formation, in case of cooling slope processing, were focused on Al-Cu [17] and Al-Si alloys [18][19][20]. The present study is taken up to bridge the above gap.…”

Section: Introductionmentioning

confidence: 99%

Phase field model of microstructure formation during cooling slope slurry generation of novel Al-15Mg₂Si-4.5Si composite

Das

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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The present study discusses the development of a two-dimensional phase field model of semi solid microstructure evolution of the novel Al-15Mg2Si-4.5Si composite during cooling slope rheoprocessing. The superheated melt of the said composite undergoes partial solidification during its shear flow over the slope free surface, prior to get collected within the isothermal slurry holding furnace. Seed undercooling based nucleation model is adopted in the present PF model to simulate slurry microstructure of the composite. Experimentally determined cooling rate values are considered to simulate slurry microstructure for different process conditions. Micrographs of melt samples collected during experimentation establishes the developed PF model as an accurate microstructure prediction tool for the composite slurry. Apart from morphological features such as size and degree of sphericity values of the evolving primary Mg2Si and α-Al grains, the model predictions includes melt temperature as well as solid content at any given instant of slurry processing.

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“…Besides, new process was used to produce aluminum alloy. Alloy used on A380 is worked out with semisolid Processing using cooling slope [14] 。…”

Section: New Processes In Aircraftmentioning

confidence: 99%

New Materials and Technology of Chinese Civil Aircraft

Sun¹,

Chen²,

An-ru³

2016

Proceedings of the 2016 5th International Conference on Advanced Materials and Computer Science

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Abstract. Criteria of next generation aircraft, "quieter, cleaner and greener", were dedicated by designers and stakeholders in the past decade years. New materials, different design philosophies and new manufacture technologies are used on civil aircraft in China. Gaps between China and abroad, in the fields of design, manufacture, materials, were mentioned. Chances and challenges China commercial aircraft company faced were pointed out. Finally, huge development potential and development trends of the domestic aircraft manufacturing were analyzed.

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Phase Field Simulation of Equiaxed Microstructure Formation during Semi-solid Processing of A380 Al Alloy

Cited by 19 publications

References 41 publications

Semi-Solid Slurries for Rheocasting of Hypoeutectic Al-Si-X Alloys Produced by Self-Stirring in Serpentine Channels

Semi-Solid Slurries for Rheocasting of Hypoeutectic Al-Si-X Alloys Produced by Self-Stirring in Serpentine Channels

Phase field model of microstructure formation during cooling slope slurry generation of novel Al-15Mg₂Si-4.5Si composite

New Materials and Technology of Chinese Civil Aircraft

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Phase Field Simulation of Equiaxed Microstructure Formation during Semi-solid Processing of A380 Al Alloy

Cited by 19 publications

References 41 publications

Semi-Solid Slurries for Rheocasting of Hypoeutectic Al-Si-X Alloys Produced by Self-Stirring in Serpentine Channels

Semi-Solid Slurries for Rheocasting of Hypoeutectic Al-Si-X Alloys Produced by Self-Stirring in Serpentine Channels

Phase field model of microstructure formation during cooling slope slurry generation of novel Al-15Mg2Si-4.5Si composite

New Materials and Technology of Chinese Civil Aircraft

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Phase field model of microstructure formation during cooling slope slurry generation of novel Al-15Mg₂Si-4.5Si composite