Grain refinement of DHP copper by elemental additions

Balart, M.J.; Patel, J. S.; Gao, Feng; Fan, Z.

doi:10.1179/1743133615y.0000000008

Cited by 8 publications

(17 citation statements)

References 7 publications

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“…This finding has not previously been explicitly recognized in the field of grain refinement of copper. It was also reported that, a nominal addition of 150 ppm Ag to DHP-Cu gave the strongest grain-refining action at both casting temperatures of 1423 K (1150°C) [16] and 1403 K (1130°C) [18] achieving CET. It was therefore suggested making the maximum additions of P of 0.04 pct and of Ag of 0.015 pct to DHP-Cu for adequate grain size control.…”

Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%

“…These results have been compared to those obtained after a nominal addition of 0.1 pct of B, Mg, Ca, Zr, and Ti to DHP-Cu with an addition of Ag of 0.015 pct and cast at 1403 K (1130°C). [18] It was reported that, a nominal addition of 0.1 pct Ag to deoxidized copper gave the strongest grain-refining action at a casting temperature of 1423 K (1150°C) [17] achieving CET. This necessitated phosphorus deoxidation of the copper melt resulting in a residual P level (0.039 pct).…”

Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%

“…[17] This temperature of 1423 K (1150°C) was chosen because previous work on DHP-Cu reported in [16] showed that the macrostructure obtained at 1423 K (1150°C) was mainly large, nonuniform columnar. Therefore, the potential beneficial effects of elemental additions on macrostructural changes could be observed at 1423 K (1150°C).…”

Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%

“…These are with a combined addition of 0.4Zr-0.039P and an individual addition of 0.5B (in wt pct). [17] B. Factors Controlling Secondary Dendrite Arm Spacing and Grain Size: Cooling Rate, Casting Temperature, Casting Atmosphere, Solute Type, and Solute Content Casting temperature and atmosphere can have an influence on the grain refinement of copper.…”

Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%

“…Grain refinement of copper has continued to be the aim of more recent investigations, and different solutions have focused on controlling microalloy compositions [16][17][18] and processing parameters. [8,9] In this work, characterizations of the influence of elemental additions on the grain structure of copper and DHP-Cu microalloyed with 150 ppm Ag have been carried out under TP-1 casting conditions.…”

Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%

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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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Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%

Section: A Previous Work On Grain Refinement Of Coppermentioning

confidence: 99%