Separating Behavior of Nonmetallic Inclusions in Molten Aluminum Under Super-Gravity Field

Song, Gaoyang; Song, Bo; Yang, Yunfeng; Yang, Zhou; Xin, Wenbin

doi:10.1007/s11663-015-0403-1

Cited by 35 publications

(11 citation statements)

References 23 publications

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“…[8][9][10][11][12][13] In the field of casting, metallurgists were mainly focused on the mold filling behavior by centrifugal method previously. [14][15][16][17] However, studies specialized to grain refinement of castings in super-gravity field are seldom reported as a whole and the refining mechanism is far from clear.…”

Section: Introductionmentioning

confidence: 99%

Effect of Super-gravity Field on Grain Refinement and Tensile Properties of Cu–Sn Alloys

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Effect of Super-gravity Field on Grain Refinement and Tensile Properties of Cu–Sn Alloys

et al. 2018

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“…As one of the external physical fields, super gravity field has presented great advantage at the fabrication of functionally graded materials [1][2][3], metal purification [4][5][6] and recovery of valuable resources [7][8][9] using its great intensification effect of relative movement [10]. A number of researches have investigated the solidification structure evolution of metals in super gravity field [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Macrosegregation behavior of solute Cu in the solidifying Al-Cu alloys in super-gravity field

Yang

Song

Yang

et al. 2018

Metall. Res. Technol.

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In this research, super gravity field was introduced to investigate the macrosegregation behavior of solute Cu in Al-Cu alloys in super gravity field systematically. And the macrosegregation mechanism was also explored by well-designed experiments. When Al-Cu alloys were solidified in super gravity field, the macrosegregation of solute Cu was generated and the solute Cu increases along the direction of super gravity field. The macrosegregation becomes severer with the increasing gravity coefficient and the solute content. When the Al-4.5wt%Cu alloy was solidified in super gravity field of G = 800, the copper content at the bottom position increases up to 8.48 wt% and that at the up position decreases to only 2.58 wt%, resulting in the positive segregation at the bottom and the negative segregation at the top of the sample. The segregation mechanisms are that solute-rich regions, which have a larger density than the main liquid, sediment toward the bottom of the sample under the effect of super gravity, and at the final solidification stage, super gravity can drive the residual solute-rich liquid to flow toward the bottom of the sample along the dendrite space (channel), which formed the super gravity channel segregation.

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“…The separation rate of solid/liquid phases grows as the increase of gravity coefficient [22], resulting in higher weight of filtrate and dilution of tramp elements in filtrate. Thus, the contents of tramp elements Zn, Cu and Mg decrease slightly with the increase of gravity coefficient as shown in Figure 10.…”

Section: Effect Of Gravity Coefficientmentioning

confidence: 99%

“…Song has investigated the removal of nonmetallic inclusions from liquid aluminum by super-gravity [21,22]. Those nonmetallic inclusions have high melting point and the separation temperature can be easily controlled between the melting points of inclusions and aluminum.…”

Section: Introductionmentioning

confidence: 99%

Removal of Tramp Elements within 7075 Alloy by Super-Gravity Aided Rheorefining Method

Guo

Wen

Bao

et al. 2018

Metals

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An investigation was made on the super-gravity aided rheorefining process of recycled 7075 aluminum alloy in order to remove tramp elements. The separation temperatures in this study were selected as 609 °C, 617 °C and 625 °C. And the gravity coefficients were set as 400 G, 700 G, 1000 G. The finely distributed impurity inclusions will aggregate to the grain boundaries of Al-enriched phase during heat treatment. In the field of super-gravity, the liquid phase composed of tramp elements Zn, Cu, Mg et al. will flow through the gaps between solid Al-enriched grains and form into filtrate. Both the weight of filtrate and removal ratio of tramp element improved with the increase of gravity coefficient. The total removal ratio of tramp element decreased with the fall of temperature due to the flowability deterioration of liquid phase. The time for effective separation of liquid/solid phases with super-gravity can be restricted within 1 min.

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Separating Behavior of Nonmetallic Inclusions in Molten Aluminum Under Super-Gravity Field

Cited by 35 publications

References 23 publications

Effect of Super-gravity Field on Grain Refinement and Tensile Properties of Cu–Sn Alloys

Effect of Super-gravity Field on Grain Refinement and Tensile Properties of Cu–Sn Alloys

Macrosegregation behavior of solute Cu in the solidifying Al-Cu alloys in super-gravity field

Removal of Tramp Elements within 7075 Alloy by Super-Gravity Aided Rheorefining Method

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