Near Net Shaped Casting of 7050 Al Wrought Alloy by CDS Process: Microstructure and Mechanical Properties

Ghiaasiaan, S. Reza; Khalaf, Abbas A.; Zheng, Xiaohua; Shankar, Sumanth

doi:10.1007/978-3-319-48179-1_53

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…Ghiaasiaan et al [9,[18][19][20][21] worked on the heat treatment of 7xxx (Al-Zn-Mg-Cu) wrought alloys that were made via the CDS process. Ghiaasiaan mixed two alloys instead of mixing pure aluminum into alloy using tilt pour gravity casting equipment that has a permanent steel mold heated to 375°C [22].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution of Al-Si hypoeutectic alloys prepared by controlled diffusion solidification

Khalaf

2022

Int J Adv Manuf Technol

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The possibility of changing the dendritic microstructure associated with the conventional casting processes of hypoeutectic Al-Si alloys to non-dendritic microstructure by using the controlled diffusion solidi cation process (CDS) has been investigated. The successful CDS process depends on mixing two precursor alloys heated at a superheat condition near their respective liquidus temperature. Experimental work and simulation work using Ansys software was carried out in the present study by employing Al-Si and Al-Cu systems. This study investigates the effect of the content of the two precursor alloys, the mass ratio changing from 2.6 to 8.3, and the superheat of the rst precursor alloy on changing the microstructure. The experimental results show that the pure aluminum used as the rst precursor alloy needs more undercooling and agitation during the mixing to form the non-dendritic microstructure compared with hypoeutectic Al-Si alloys. Further, mixing pure aluminum with hypereutectic alloy can change the microstructure of hypoeutectic alloys leading to extending the possibility to choose the second precursor alloy. The results also show that a higher mass ratio is preferred when mixing pure aluminum with hypoeutectic alloy. Furthermore, the microstructure of the alloy Al-6.45Si-4Cu-0.5Mg-0.66Fe-0.66 wt%Zn was successfully changed via the CDS process by mixing Al-7.75Si-0.79Fe-0.78Zn-0.6 wt%Mg at 2°C superheat into Al-24 wt%Cu at around 5°C superheat. The simulation results show that lower air bubbles and better distribution of the two precursor alloys happen during the mixing step when using the Al-Cu system.

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Section: Introductionmentioning

confidence: 99%

Microstructure evolution of Al-Si hypoeutectic alloys prepared by controlled diffusion solidification

Khalaf

2022

Int J Adv Manuf Technol

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Microstructure evolution of Al-Si hypoeutectic alloys prepared by controlled diffusion solidification

Khalaf

2022

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The possibility of changing the dendritic microstructure associated with the conventional casting processes of hypoeutectic Al-Si alloys to non-dendritic microstructure by using the controlled diffusion solidification process (CDS) has been investigated. The successful CDS process depends on mixing two precursor alloys heated at a superheat condition near their respective liquidus temperature. Experimental work and simulation work using Ansys software was carried out in the present study by employing Al-Si and Al-Cu systems. This study investigates the effect of the content of the two precursor alloys, the mass ratio changing from 2.6 to 8.3, and the superheat of the first precursor alloy on changing the microstructure. The experimental results show that the pure aluminum used as the first precursor alloy needs more undercooling and agitation during the mixing to form the non-dendritic microstructure compared with hypoeutectic Al-Si alloys. Further, mixing pure aluminum with hypereutectic alloy can change the microstructure of hypoeutectic alloys leading to extending the possibility to choose the second precursor alloy. The results also show that a higher mass ratio is preferred when mixing pure aluminum with hypoeutectic alloy. Furthermore, the microstructure of the alloy Al- 6.45Si- 4Cu- 0.5Mg- 0.66Fe- 0.66 wt%Zn was successfully changed via the CDS process by mixing Al- 7.75Si- 0.79Fe- 0.78Zn- 0.6 wt%Mg at 2°C superheat into Al-24 wt%Cu at around 5°C superheat. The simulation results show that lower air bubbles and better distribution of the two precursor alloys happen during the mixing step when using the Al-Cu system.

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Near Net Shaped Casting of 7050 Al Wrought Alloy by CDS Process: Microstructure and Mechanical Properties

Cited by 2 publications

References 12 publications

Microstructure evolution of Al-Si hypoeutectic alloys prepared by controlled diffusion solidification

Microstructure evolution of Al-Si hypoeutectic alloys prepared by controlled diffusion solidification

Microstructure evolution of Al-Si hypoeutectic alloys prepared by controlled diffusion solidification

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