Dendritic solidification of Cu-Ni alloys: Part I. Initial growth of dendrite structure

Doherty, R.D.; Feest, E. A.; Holm, K.

doi:10.1007/bf02649610

Cited by 31 publications

(4 citation statements)

References 10 publications

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“…The final grain structure depends on the ratio of the temperature gradient in the liquid to the rate of advancement of the solid-liquid interface. For most alloys it is impracticable to avoid constitutional undercooling and so dendritic solidification occurs during the production of almost all alloys (Doherty et al 1973). It seems from figure 1 that the extent of segregation of the Ni-rich phases was lowest in vacuum pressure cast alloy and highest in high frequency induction cast alloy.…”

Section: Discussionmentioning

confidence: 97%

Preferential dissolution behaviour in Ni-Cr dental cast alloy

Saji

Choe

2010

Bull Mater Sci

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A Ni-Cr-Mo dental alloy was fabricated by three different casting methods, viz. centrifugal casting, high frequency induction casting and vacuum pressure casting. The dependence of cast microstructure on the electrochemical corrosion behaviour was investigated using potentiodynamic cyclic and potentiostatic polarization techniques, impedance spectroscopy and scanning electron microscopy. The experimental results were compared and discussed with those obtained for a Co-Cr-Mo counterpart. The results of the study showed that the variation in casting morphologies with casting methods has only marginal influence in the overall corrosion resistance of Ni-Cr and Co-Cr dental alloys. There was severe preferential dissolution of Ni rich, Cr and Mo depleted zones from the Ni-Cr-Mo alloy. The overall corrosion resistance property of the Co-Cr base alloy was better than that of the Ni-Cr base alloy.

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Section: Discussionmentioning

confidence: 97%

Preferential dissolution behaviour in Ni-Cr dental cast alloy

Saji

Choe

2010

Bull Mater Sci

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“…Although the Ni-Cu system exhibits complete solid solubility [3], the large differences in melting points between Ni (1455 • C) and Cu (1085 • C) can result in Cu segregation. Following equilibrium solidification at slow cooling rates, dendrites become enriched in Ni and interdendritic regions get enriched in Cu [4][5][6]. However, with an increase in cooling rate during solidification the compositional gradient decreases and the microstructure morphology changes from dendritic to cellular [7].…”

Section: Introductionmentioning

confidence: 99%

Strengthening Mechanisms in Nickel-Copper Alloys: A Review

Marenych

Kostryzhev

2020

Metals

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Nickel-Copper (Ni-Cu) alloys exhibit simultaneously high strength and toughness, excellent corrosion resistance, and may show good wear resistance. Therefore, they are widely used in the chemical, oil, and marine industries for manufacturing of various components of equipment, such as: drill collars, pumps, valves, impellers, fixtures, pipes, and, particularly, propeller shafts of marine vessels. Processing technology includes bar forging, plate and tube rolling, wire drawing followed by heat treatment (for certain alloy compositions). Growing demand for properties improvement at a reduced cost initiate developments of new alloy chemistries and processing technologies, which require a revision of the microstructure-properties relationship. This work is dedicate to analysis of publicly available data for the microstructure, mechanical properties and strengthening mechanisms in Ni-Cu alloys. The effects of composition (Ti, Al, Mn, Cr, Mo, Co contents) and heat treatment on grain refinement, solid solution, precipitation strengthening, and work hardening are discussed.

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“…Dendrite structures, which are highly hierarchical branched patterns with primary-, secondary-and higherorder branches, are of immense practical importance in determining the engineering properties of materials that solidify dendritically [1][2][3]. Studying the dendritic growth has also been of long-standing fundamental interest because of the ubiquity of branched structures exhibited by diverse interfacial pattern formation systems, and discovering how crystals grow, develop, and create such complex patterns has been a challenge to researchers in crystalline materials for several centuries [4][5][6][7][8][9][10]. Considering the crystallization from liquids should be mostly determined by the heat and solute diffusions at the interfaces, the crystalline microstructure should be the result of the morphological instability of the solid-liquid interface.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric effects induced dendrite branching dynamics in pure substances: An insight from morphological theory

Cao

Gao

et al. 2020

Eur. Phys. J. E

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Insights on the mechanical behavior in materials highly depend upon sufficiently characterizing microstructure details at the relevant length scales. In this study, the side-branching dynamics of dendritic structures formation in pure substances is studied upon the phase-field simulations of crystallization with applied direct currents. The effect of heat diffusion (including thermoelectric effect and undercooling) on the dendritic development is investigated, and the characteristics of the primary arms and side-branches are identified by implementing the image recognition technique. Results indicate that increasing the latent heat release would firstly enhance the side-branching and then cause the side-branches re-melting with large heat extraction form the solid. The side-branching could be tailored by rationally controlling the applied electric filed as well the heat treatment, which could be a potential way to improve the mechanical properties in metallic materials via optimizing the microstructure.

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Dendritic solidification of Cu-Ni alloys: Part I. Initial growth of dendrite structure

Cited by 31 publications

References 10 publications

Preferential dissolution behaviour in Ni-Cr dental cast alloy

Preferential dissolution behaviour in Ni-Cr dental cast alloy

Strengthening Mechanisms in Nickel-Copper Alloys: A Review

Thermoelectric effects induced dendrite branching dynamics in pure substances: An insight from morphological theory

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