A comparative study of dendritic growth within undercooled liquid pure Fe and Fe50Cu50 alloy

Luo, Shaobo; Wang, W.L.; Chang, Jiang; Xia, Z.C.; Wei, Baogang

doi:10.1016/j.actamat.2013.12.009

Cited by 80 publications

(16 citation statements)

References 29 publications

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“…There still exist two questions need to make it clear. First, although the dendritic growth velocity in different alloy systems shows good agreement with theoretical model under low undercooling condition, it always deviates from the theoretical model when the alloy melt is undercooled into a high level [5]. Second, it is still difficult to explain the dendrite growth mechanism in the immiscible alloy system.…”

Section: Introductionmentioning

confidence: 79%

Liquid phase separation and rapid dendritic growth of undercooled ternary Fe60Co20Cu20 alloy

et al. 2017

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Liquid ternary Fe 60 Co 20 Cu 20 alloy was undercooled by up to 357 K (0.21 T L ) with glass fluxing method and its rapidly solidified microstructures were investigated by EDS and EBSD technologies. The ternary Fe 60 Co 20 Cu 20 alloy rapidly solidifies with rapid dendritic growth of the primary γ-Fe phase within 37-243 K undercooling range. When the alloy melt is undercooled to 243 K, an obvious phase separation takes place and the uniform alloy melt separates into (Fe, Co)-rich and Cu-rich phases within 243-357 K undercooling range. The primary γ-Fe phase takes place in a solid-state phase transformation and becomes α-Fe phase in the final microstructure. The microstructure of α-Fe phase transforms from coarse dendrite at small undercoolings to equiaxed grain at large undercoolings. EBSD analysis reveals that the coarse α-Fe dendrites grows anisotropically with a ⟨110⟩ preferred orientation on condition that undercooling is less than 178 K, whereas no apparent preferred growth orientation is found in the equiaxed grains once undercooling exceeds this critical value. The growth velocity of primary γ-Fe dendrite increases up to 37 ms −1 as undercooling increases to 243 K, but it decreases as undercooling further increases, ascribing to that the dendrite growth is impeded by phase separation.

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Section: Introductionmentioning

confidence: 79%

Liquid phase separation and rapid dendritic growth of undercooled ternary Fe60Co20Cu20 alloy

et al. 2017

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“…The substantial undercooling and characteristic properties of liquid alloys have attracted more and more interest in the past decade due to the significance for both experimental and computational materials science studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Up to now, the crystal growth and thermal properties research of liquid melts in substantial undercooled state such as crystal growth velocity [2], surface tension [6][7][8][9][10] and specific heat [12] are still limited owing to the difficulty of experiments.…”

Section: Introductionmentioning

confidence: 99%

“…The crystal growth velocity was measured by a high-speed photodiode device. The detail of these methods has been reported in references [2,6,12,15].…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, the crystal growth and thermal properties research of liquid melts in substantial undercooled state such as crystal growth velocity [2], surface tension [6][7][8][9][10] and specific heat [12] are still limited owing to the difficulty of experiments. Fortunately, the substantial undercooling can be obtained by the electromagnetic levitation [6,7,12], and the oscillating drop method [6,7,9,10] and drop calorimetry [12] under levitated condition can be used to determine the surface tension and specific heat of liquid melts, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, the substantial undercooling can be obtained by the electromagnetic levitation [6,7,12], and the oscillating drop method [6,7,9,10] and drop calorimetry [12] under levitated condition can be used to determine the surface tension and specific heat of liquid melts, respectively. The electromagnetic levitation technique has also been applied to investigate the rapid crystal growth within undercooled liquid alloys [2]. Moreover, the mechanical property of small alloy samples is often determined by compression tests.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the thermophysical properties of liquid and solid Ti–6Al–4V alloy

Zhou

Wei

2016

Appl. Phys. A

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The surface tension and specific heat for liquid ternary Ti-6Al-4V alloy were measured by the oscillating drop method and drop calorimetry, respectively, under containerless condition over broad temperature ranges. The solidification microstructures at different undercoolings appeared as the basket-weave morphology. The relationship between dendritic growth velocity of b phase and undercooling was determined as a power function, and the growth velocity attained 22.21 ms -1 at the maximum undercooling of 252 K (0.13 T L ). The mechanical property of this alloy solidified at different undercoolings was determined through compression tests, while its thermal diffusivity in the solid state was measured by the laser flash method.

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Effect of processing parameters of laser on microstructure and properties of cladding 42CrMo steel

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Cui

Wang

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A comparative study of dendritic growth within undercooled liquid pure Fe and Fe50Cu50 alloy

Cited by 80 publications

References 29 publications

Liquid phase separation and rapid dendritic growth of undercooled ternary Fe60Co20Cu20 alloy

Liquid phase separation and rapid dendritic growth of undercooled ternary Fe60Co20Cu20 alloy

Determination of the thermophysical properties of liquid and solid Ti–6Al–4V alloy

Effect of processing parameters of laser on microstructure and properties of cladding 42CrMo steel

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