Ablation technology applied to A356 alloys compared with conventional casting processes

Barbarias, E.; Niklas, Andrea; Lizarralde, Ibon; Garat, Michel; Bakedano, A.; Fernández-Calvo, Ana Isabel

doi:10.1016/j.msea.2021.142528

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…With the increased cooling rate, a refine microstructure is expected which in turn imparts better mechanical performance of the part. Micro-porosities and dendrites examined by Barbarias et al [32] on the surface of A356 alloy in case of conventional casting and ablation casting as depicted in Fig. 6a, b.…”

Section: Response Surface Plots For Dimensional Deviationmentioning

confidence: 99%

“…Consequently, fragmented inter-metallics are generated in inter-dendritic zones because of ablation which results into ductile fracture. Because the ablation process reduces the intensity of the stress-concentration effect on smaller Si particles and microregions with potential crack initiation by shrinking the size of Fe-bearing phases, it reduces the risk of brittle fracture in the last solidification region developed by poly phases [32].…”

Section: Fractography Analysismentioning

confidence: 99%

“…From the cast's distal end to the feeder, increasing solidification allows for the elimination of shrinkage and even gas holes. According to Barbarias et al [32] the microstructure of the finest Si eutectic and iron-bearing phases solidified at a high cooling rate due to mold dissolution in ablation, rather than the SDAS value, which corresponds to a conventional sand-casting process with isolated areas of lower values associated with ablation, is the reason for the good mechanical properties of ablated samples.…”

Section: Introductionmentioning

confidence: 99%

“…Fig.6Micro-porosities and dendrites on polished surface of (a) SEM image of conventional casting (b) SEM image of ablation casting[32] …”

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confidence: 99%

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A comprehensive efficiency evaluation of conventional and ablation sand casting on the example of the AlSi7Mg alloy impeller

Hafeez

Ahmed

Ali

et al. 2022

Int J Adv Manuf Technol

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Ablation sand casting is a new technology for casting aluminum alloys which helps to achieve superior cooling trends during the solidification and results in eutectic microstructure, reduced degree of defects, and improved mechanical attributes. To further enhance the functionality, water-soluble binder-based sand molds are used in conjunction with appropriate control over process parameters for specialized applications such as complex and thin-walled impeller manufacturing. In this regard, the influence of key process parameters including binder ratio (BR), sand grain fineness number (AFS number), and pouring temperature (PT) is investigated thoroughly on the mechanical characteristics (ultimate tensile strength and hardness) and dimensional accuracy of the thin-walled impeller. Ablation sand casting revealed exceptionally enhanced mechanical properties and dimensional accuracy as compared to conventional sand casting. The AFS number and binder ratio were most significant for controlling the dimensional accuracy. Multi-response optimization through Grey Relational Analysis reveals the optimal setting PT = 800 ℃, ASF number = 45, BR = 5% for lower dimensional deviation, higher hardness, and ultimate tensile strength through conventional sand casting. While for ablation case, the optimal conditions PT = 850 ℃, ASF number = 40, BR = 9% are attained against desired attributes. The attributes are significantly improved through ablated sand casting, dimensional accuracy 31.6%, hardness 58.9% and ultimate tensile strength 41.82%, and fractography analysis depicted the ductile fracture surface. The current technology is drawing attention of industry because of its potential in producing castings with superior mechanical properties and improved internal integrity.

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Section: Response Surface Plots For Dimensional Deviationmentioning

confidence: 99%

Section: Fractography Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Fig.6Micro-porosities and dendrites on polished surface of (a) SEM image of conventional casting (b) SEM image of ablation casting[32] …”

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confidence: 99%

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