Rapid dendritic growth in undercooled Ag-Cu melts

Walder, S.; Ryder, P.L.

doi:10.1016/0956-7151(95)00092-a

Cited by 60 publications

(7 citation statements)

References 21 publications

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“…If one eutectic colony originates from one effective nucleus, copious nucleation can be inferred to take place within the entire sample in the free solidification of eutectic melts. pct Cu, [28,29] Fe-3 wt pct P, [30] Ni-3.1 at. Further detailed discussions on the copious nucleation and significant impact of this nucleation behavior on growth-velocity measurements have been described elsewhere.…”

Section: A Nucleation-controlled Microstructures In Co-sn and Ni-si mentioning

confidence: 99%

Nucleation-controlled microstructures and anomalous eutectic formation in undercooled Co-Sn and Ni-Si eutectic melts

Kuribayashi

2003

Metall Mater Trans A

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Section: A Nucleation-controlled Microstructures In Co-sn and Ni-si mentioning

confidence: 99%

Nucleation-controlled microstructures and anomalous eutectic formation in undercooled Co-Sn and Ni-Si eutectic melts

Kuribayashi

2003

Metall Mater Trans A

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“…In Cu-Ag alloys, increasing the Ag content for a given cooling rate and increasing the cooling rate for a given Ag content produced finer secondary dendrite arm spacing. [24,26] On decreasing the cooling rate resulting by changing from a water-cooled copper mold to a graphite mold, at a nominal solute addition of 0.1 wt pct into the copper melt under an Ar atmosphere and cast at 1433 K (1160°C), Be, Mg, Ca, Sr, Al, Si, As, Sb, Bi, Se, and Te additions caused grain coarsening, whereas additions of In, Ti, Ge, Sn, Pb, P, S, and Se only resulted in a slightly increased grain size. [3] The type and content of solute and k effects on grain size are discussed below.…”

Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%

“…A greater degree of CET was obtained: (i) on decreasing the casting temperature from 1423 K (1150°C) [16] to 1403 K (1130°C) [18] to 1373 K (1100°C) (horizontal arrows), for fixed addition of: 0.039 pct P (cf. casts [26][27][28] and of 150 ppm Ag (cf. casts 29 and 30); and (ii) with a microalloying addition of 150 ppm Ag (vertical arrows), for a given casting temperature (cf.…”

Section: E P and Ag Microalloying Additionsmentioning

confidence: 99%

Grain Refinement of Deoxidized Copper

Balart

Patel

Gao

et al. 2016

Metall Mater Trans A

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This study reports the current status of grain refinement of copper accompanied in particular by a critical appraisal of grain refinement of phosphorus-deoxidized, high residual P (DHP) copper microalloyed with 150 ppm Ag. Some deviations exist in terms of the growth restriction factor (Q) framework, on the basis of empirical evidence reported in the literature for grain size measurements of copper with individual additions of 0.05, 0.1, and 0.5 wt pct of Mo, In, Sn, Bi, Sb, Pb, and Se, cast under a protective atmosphere of pure Ar and water quenching. The columnar-to-equiaxed transition (CET) has been observed in copper, with an individual addition of 0.4B and with combined additions of 0.4Zr-0.04P and 0.4Zr-0.04P-0.015Ag and, in a previous study, with combined additions of 0.1Ag-0.069P (in wt pct). CETs in these B-and Zr-treated casts have been ascribed to changes in the morphology and chemistry of particles, concurrently in association with free solute type and availability. No further grain-refining action was observed due to microalloying additions of B, Mg, Ca, Zr, Ti, Mn, In, Fe, and Zn (~0.1 wt pct) with respect to DHP-Cu microalloyed with Ag, and therefore are no longer relevant for the casting conditions studied. The critical microalloying element for grain size control in deoxidized copper and in particular DHP-Cu is Ag.

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“…Furthermore, the dendrite size is also an important parameter to evaluate the dendritic growth and microstructure formation [19,22]. As mentioned above, the primary γ-Fe transforms to α-Fe after solid-state phase transformation.…”

Section: Rapid Dendritic Growth Of the Primary γ-Fe Phasementioning

confidence: 99%

“…The present studies on Fe-Co-Cu alloy system are mainly focused on the thermodynamics calculation of phase diagram and microstructure evolution [20,21,22,23]. However, the dendritic growth velocity of the primary phase in Fe-Co-Cu alloy has not been studied extensively until now.…”

Section: Introductionmentioning

confidence: 99%

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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Rapid dendritic growth in undercooled Ag-Cu melts

Cited by 60 publications

References 21 publications

Nucleation-controlled microstructures and anomalous eutectic formation in undercooled Co-Sn and Ni-Si eutectic melts

Nucleation-controlled microstructures and anomalous eutectic formation in undercooled Co-Sn and Ni-Si eutectic melts

Grain Refinement of Deoxidized Copper

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

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