Banding phenomena in AlFe alloys subjected to laser surface treatment

Gremaud, M.; Carrard, Michel; Kurz, W.

doi:10.1016/0956-7151(91)90228-s

Cited by 111 publications

(45 citation statements)

References 17 publications

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“…The rapid cooling [12][13][14][15] method and the application of ultrasonic wave vibration [16][17][18][19][20] are considered as two effective alternatives to obtain fined microstructures, without adding other elements. By using the former method, very fine microstructures on the micro-and nanoscales, or amorphous phase can be achieved in thin ribbons or atomized powders due to the necessity of achieving enormously high cooling rate.…”

Section: Introductionmentioning

confidence: 99%

Grain Refinement of Tough Pitch Copper by Electromagnetic Vibrations during Solidification

et al. 2006

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Electromagnetic vibrations, which are generated by simultaneous imposition of a static magnetic field and an alternating electric field, were applied to the refinement of crystal grains of tough pitch copper. The electromagnetic vibrations of the frequency range from 100 Hz to 10 kHz were imposed during solidification of the copper rod. Within this frequency range, the vibration frequency of about 100 Hz was found to be the most effective in refining the copper crystal grains and the average grain size was refined up to 200 mm, which otherwise was around 600 mm in a nonvibrated specimen. It was concluded that by the electromagnetic vibration process tough pitch copper could also be refined as well as Al-Si alloys and AZ91D alloys.

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Section: Introductionmentioning

confidence: 99%

Grain Refinement of Tough Pitch Copper by Electromagnetic Vibrations during Solidification

et al. 2006

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“…As microstructural refinement methods, rapid cooling, 1,2) addition of refiners [3][4][5][6][7][8] and application of ultrasonic wave vibrations [9][10][11][12] are considered. However, the use of refiners has some problems in that refiner materials are often expensive and the recycling of used materials becomes difficult.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Intensity and Frequency of Electromagnetic Vibrations on Refinement of Primary Silicon in Al-17%Si Alloy

et al. 2004

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Electromagnetic vibrations, which are the interaction between a static magnetic field and an alternating electric field, were applied to the structural refinement of Al-17%Si hyper-eutectic alloy. The relationship between the intensity and frequency of the electromagnetic vibrations and the refinement of primary silicon particles is quantitatively investigated. In the frequency range from 10 Hz to 30 kHz, the vibration frequency near 1 kHz was most effective for the refinement of silicon particles, and silicon particles of sizes up to approximately 5 mm were refined at that frequency. The level of refinement increased with increasing the intensity of electromagnetic vibrations. A primary silicon particle was sufficiently refined with a magnetic field intensity of only approximately 1.6 Tesla (T).

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“…This, however, cannot explain the interface dynamics itself which could give rise to banded structures. Thus Boettinger et al [66], Gremaud et al [73], and Carrard et al [54] have proposed a phenomenological interface dynamics model to elaborate the timeperiodic structure change. The Figure 2.31 schematically shows the steady state velocitydependent interface temperature of planar and dendritic growth for high velocity range.…”

Section: Phenomenological Analysis and Schematics Of Banded Structurementioning

confidence: 99%

“…Dendritic alloys: Ag-1˜65% Cu [66,67,68,69,70,71], Al-20˜33%Cu [72], Al-0.5˜4%Fe [73], Al-20%Pd [65], Al-6%Zr [74] Eutectic alloys: Ag-28%Cu [66], Al-33%Cu [75,76] Formation of this banded structure occurs at velocities near the limit of the absolute stability: the absolute stability velocity can be calculated from Mullins-Sekerka's stability analysis of planar front and the velocity, a perturbation with any wavelength tends to diminish, i.e. a planar front is the most stable.…”

Section: Early Interesting Observation Of Banded Structure In Rapid Smentioning

confidence: 99%

Phase-field investigation on the non-equilibrium interface dynamics of rapid alloy solidification

Choi

2011

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Banding phenomena in AlFe alloys subjected to laser surface treatment

Cited by 111 publications

References 17 publications

Grain Refinement of Tough Pitch Copper by Electromagnetic Vibrations during Solidification

Grain Refinement of Tough Pitch Copper by Electromagnetic Vibrations during Solidification

Effect of the Intensity and Frequency of Electromagnetic Vibrations on Refinement of Primary Silicon in Al-17%Si Alloy

Phase-field investigation on the non-equilibrium interface dynamics of rapid alloy solidification

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