The Effect of Section Size on Cooling Rate, Microstructure and Mechanical Properties of A356 Aluminium Alloy in Casting

Akhil, K.T.; Arul, Sanjivi

doi:10.1016/j.mspro.2014.07.278

Cited by 20 publications

(12 citation statements)

References 5 publications

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“…Akhil et al (2014) reported the cooling characteristics of cast components with varying section size and investigated how cooling rate and mechanical properties vary with varying section size. Tabibian et al (2010) defined a thermo-mechanical fatigue criterion in order to predict the failure of cylinder heads issued with the lost foam casting process.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis for casting process under stochastic modelling

Kumar¹

2015

10.5267/j.ijiec

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The present paper studies the reliability analysis of the casting process in foundry work using a probabilistic approach. As foundry industries in many developing countries suffer from poor quality of casting due to improper management, lack of resources and wrong working methods followed, which results in the decrement of productivity. Hence, to ensure the quality and productivity, favorable steps must be taken. The considered casting system has four main types of defects; namely mold shift, shrinkage, cold shut and blowholes. The complete casting system can fail due to the misalignment of the mold and combination of defects such as shrinkage and blow holes and can also fail by defects of shrinkage, blow holes and cold shut, simultaneously. The system is analyzed with the help of the supplementary variable technique and Laplace transformation. The availability, reliability, mean time to failure, sensitivity analysis and costeffectiveness have been evaluated for the considered system. The results have been shown with the help of graphs, which predicts the behavior of the casting process system when any one of the defect or more than one defect appears.

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Section: Introductionmentioning

confidence: 99%

Sensitivity analysis for casting process under stochastic modelling

Kumar¹

2015

10.5267/j.ijiec

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“…The V/A ratio pertains to the ratio of volume of the casting to the heat-emitting surface of the casting. As the V/A ratio increases, the solidification time of the casting also increases [21,22]. The increased solidification time is responsible for coarse grain sizes, whereas at high cooling rate fine grain sizes are produced.…”

Section: Preliminary Studymentioning

confidence: 99%

Effect of process parameters on surface roughness of hybrid investment casting

2016

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Fused deposition modelling (FDM) is one of the additive manufacturing technologies that can be effectively used for making patterns for investment casting. This method is considered to be economical for low volume of production as tooling is not involved in this process. However, the surface finish of the patterns produced by using FDM machine is poor as compared to wax patterns produced by using a die. The surface finish of the castings produced by the investment casting process are dependent on the surface finish of the pattern, therefore in order to use plastic patterns instead of wax patterns, there is a need to improve the surface finish of the FDM patterns. For this purpose, a coating of thin layer of wax has been proposed on the plastic patterns made by using FDM. In this paper the effect of wax coating and other process parameters has been studied on the surface roughness of the castings.

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“…The experimental results show that the solidification processing parameters strongly effect on the solidification morphology. The effects of similar solidification processing parameters (cooling rates: 0.1-2.5 K/s) can be seen in sand casting and/or permanent steel applications of Al-Zn alloys [15][16][17][18] . In this work, cellular and dendritic microstructures were obtained depending on V (8.25-165 µm/s) at a G (10.3 K/ mm) (that is cooling rates: 0.09-1.7 K/s).…”

Section: Microstructural Evolutionmentioning

confidence: 99%

“…In unsteady-state/transient directional solidification and casting, the microstructure is no longer uniform along the specimen because the cooling rate, (V and G), decreases as the distance from the cold zone increases [15][16][17][18] . In controlled directional solidification, generally the sample is homogeneous since C o , G, V, T are constant throughout the experiment.…”

Section: Introductionmentioning

confidence: 99%

“…However, in the unsteady-state/transient directional solidification and casting, the initial solidification processing parameters are quite different from the lateral values as the solidification temperature and/or the solidliquid interface area are moved away from the cold zone. Therefore, this affects the microstructure parameters, the homogeneity and thus the properties of the product [18][19][20] . For these reasons, in the unsteady-state/transient directional solidification experiments, the C o , G, V, T are measured [21][22][23] .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Growth Velocity and Zn Content on Microhardness in Directionally Solidified Al-Zn Alloys

Acer¹,

Çadırlı

Erol

et al. 2018

Mat. Res.

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In this study, Al-xZn (x=1, 3, 5, 7, 10 and 20 wt. %) alloys were prepared using metals of 99.99% high purity in the vacuum atmosphere. These alloys were directionally solidified upward with a constant temperature gradient, G (10.3 K/mm) and different growth velocities (V) between 8.25 and 165 µm/s in the directional solidification apparatus. The experimental results have revealed that with the increase of the growth velocity of the melts from 8.25 µm/s to 165 µm/s, the microstructures undergo a transition from cellular/cellular dendritic morphology to coarse dendritic form for each composition (Zn content, C o). The measurements of microhardness (HV) of the specimens were performed by using a microhardness test device. The dependence of HV on V and C o was analyzed, and it has been found that with increasing the V and C o the HV increases. Relationships between HV-V and HV-C o were obtained by linear regression analysis, and the experimental results were compared with the results of previous similar works.

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The Effect of Section Size on Cooling Rate, Microstructure and Mechanical Properties of A356 Aluminium Alloy in Casting

Cited by 20 publications

References 5 publications

Sensitivity analysis for casting process under stochastic modelling

Sensitivity analysis for casting process under stochastic modelling

Effect of process parameters on surface roughness of hybrid investment casting

Effect of Growth Velocity and Zn Content on Microhardness in Directionally Solidified Al-Zn Alloys

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