Extrusion behavior of Al-Cu alloys in the semisolid state

Lee, B.S.; Joo, Dae Heon; Kim, M.H.

doi:10.1016/j.msea.2005.04.050

Cited by 18 publications

(9 citation statements)

References 9 publications

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“…In semisolid processes, shear rate is the most important parameter that can break the microstructure with dendrite forms and can alter them to globular ones. 6 In high percent of solid fraction, around 60%, and under the effect of force, the alloy has a good mobility. In this condition, the alloy can be still formed by conventional forming process.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the hardness improvement for Al-A380 alloy using the controlled atmosphere in the mechanical stirring casting method

Kolahdooz

2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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This work studied the semisolid (SSM) Al-A380 alloy formed by mechanical stirring under the circumstances of controlled atmosphere with argon gas. The A380 aluminium alloy produced due to this process can be used instead of the forging processes or die casting with better mechanical properties. In this paper, first, the effects of the solid fraction, the stirring speed and the mold temperature on the hardness and microstructure are studied using a mechanical stirrer. Then some tests such as XRD and ultrasonic test are done to investigate the effect of using the controlled atmosphere system. By optimizing the forming parameters and with the breaking of primary a phase dendrites, the microstructure will be changed to the spherical form, therefore the mechanical properties will be improved. The results showed that the hardness of the billets has increased significantly due to the uniform grains distribution at the condition of 580 ℃ stirring temperature, 300 r/min stirring speed and mold temperature of 100 ℃. Also, the process properly optimized with the controlled atmosphere. In this condition, the results illustrated that the mechanical properties of the alloy increased around 30%.

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Section: Introductionmentioning

confidence: 99%

Investigation of the hardness improvement for Al-A380 alloy using the controlled atmosphere in the mechanical stirring casting method

Kolahdooz

2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Semi-solid metal (SSM) processing has nowadays been established as an advanced technology in the manufacturing of engineering components (Giordano & Chiarmetta, 2004). In this method, shear rate is applied to a molten metal which is on its solidifying range, and dendrite microstructure is broken and change to globular microstructure (Lee et al, 2005). There are different theories about globularizing mechanism at primary phase, of which two are more popular.…”

Section: Introductionmentioning

confidence: 99%

Effect of angle, length and circulation cooling system on microstructure A360 Aluminum alloy in semi-solid metal forming by cooling slope method

Kaykha¹

2017

10.5267/j.esm

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Application of cooling slope in casting is a relatively simple process with low equipment and processing costs, which is able to produce semi-solid slurries with different parameters such as pouring temperature, length and angle of slope plate, and plate type. In this study, the effect of angle and length of copper made slope plate on the microstructure of A360-Aluminum alloy is investigated. Microstructure study of metallographic samples in different conditions revealed that for 400mm slope length and 60° slope angle the optimum sphierized and homogenized microstructure is achieved. Also, under these conditions, the most hardness (77HB) was obtained, which might be because of suitable solidification conditions namely time and rate of shear stress. After finding the suitable conditions of slope length and angle, the effect of the circulation cooling system was examined; and the method with cooling system was found to result in more homogenized microstructure compared to ordinary method.

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“…In the case of wrought aluminium alloys, an additional heat treatment consisting of solution annealing, quenching and ageing is usually applied to increase strength, thus influencing ductility [6,7]. Other alternative methods such as forging, extrusion, superplastic-forming (equal channel angular pressing -ECAP or high pressure torsion -HPT) are also reported on in the relevant literature [7][8][9][10][11][12][13][14]. Some unconventional methods include addition of ceramic, metallic or intermetallic second phase particles with high elastic moduli into the aluminium matrix leading to formation of composites with improved properties [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on the microstructural development of Al–Ni layered binary couples produced by an unconventional method

Čelko¹,

Torre²,

Klakurková³

et al. 2014

Surface and Coatings Technology

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Extrusion behavior of Al-Cu alloys in the semisolid state

Cited by 18 publications

References 9 publications

Investigation of the hardness improvement for Al-A380 alloy using the controlled atmosphere in the mechanical stirring casting method

Investigation of the hardness improvement for Al-A380 alloy using the controlled atmosphere in the mechanical stirring casting method

Effect of angle, length and circulation cooling system on microstructure A360 Aluminum alloy in semi-solid metal forming by cooling slope method

Temperature effect on the microstructural development of Al–Ni layered binary couples produced by an unconventional method

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