Heredity of Aluminum Melt by Electric Pulse Modification (II)

Qi, Jingang; Wang, Jianzhong; Du, Huiling; Li-yun, Cao

doi:10.1016/s1006-706x(07)60079-x

Cited by 12 publications

(5 citation statements)

References 3 publications

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“…So it is deservedly essential for primary Si to improve the morphology, decrease the size and uniformize the distribution. Recently the microstructure of hypereutectic Al-Si alloys can be refined by refiner addition [6][7][8][9][10][11], melt vibration [12][13][14][15], pulse treatment [16], etc., among which phosphorus-containing refiner addition is widely applied in practice. Among all phosphorus-containing refiners, the Al-P master alloy developed these years is able to overcome the shortcomings of other phosphorus-containing refiners (Cu-P master alloy or phosphate salt) such as environmental pollution and instable refinement efficiency, etc., and now has obtained a good application [11].…”

Section: Introductionmentioning

confidence: 99%

The investigation of continuous nucleation and refinement of primary Si in Al–30Si mushy zone

Zuo

Qian

et al. 2010

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

The investigation of continuous nucleation and refinement of primary Si in Al–30Si mushy zone

Zuo

Qian

et al. 2010

Journal of Alloys and Compounds

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“…Many interesting findings have been reported from those studies [1~4] . For examples, Wang et al [2,3] have studied the heredity of Al casting by heredity parameter I ( where I=g n /g 0 , g n represents the crystal granularity of remelted Al casting n times, and g 0 represents the crystal granularity of original samples). The results showed that the heredity parameter I decreased obviously along with the addition times of casting remelting, and this phenomena also reflected the relativity of clusters stability, namely the revolution, synthesis and cleavage reactions.…”

Section: Introductionmentioning

confidence: 99%

A Calculation Study on the Synthesis Routes of Oh-Al<sub>13 </sub>Cluster

Liu

et al. 2011

AMR

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Based on the method of LST/QST improved in the molecular orbital DMol3 program, with the aid of the minimum energy path (MEP) in the climbing image nudged elastic band (CI-NEB) method, the Oh-Al13 cluster is investigated under different synthesis process, i.e. Al6+Al7→Al13. The results show that: there are two stages in the synthesis reaction: the distortion stage and the configuration revolution stage. In the first stage, the metastable structures are forced to change into stable structures. In the configuration evolution stage, two different cases exist. For the synthesis of crystal clusters it is an automatic exothermic reaction if all reactants being of typical crystal symmetrical elements, i.e., Al6+Al7M®Oh-Al13. While an energy barrier must be overcome if one of reactants having fivefold or tenfold symmetrical axes, i.e.,Al6+Al7、Al6M+Al7 and Al6M+Al7M. So the five-symmetry structures are only appearing in rapidly solidified processes except crystallization processes.

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“…Fortunately, the outstanding structure heredity of the EP-modified liquid aluminum has been reported recently [7,8] . It indicated that for the EP-modified aluminum casting, its liquid structure after once remelting could roughly substitute for that in the EP-modified duration.…”

Section: Introductionmentioning

confidence: 99%

Structural Transformation in Electric Pulse Modified Liquid Aluminum

Jian-zhong

Zhao

et al. 2010

AMR

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The modification of liquid metal by electric pulse (EP) is a novel method for grain refinement. In this study, based on the reported structural heredity of EP-modified liquid aluminum, the structure tests of EP-modified liquid aluminum were conducted by using high temperature X-ray diffractometer. The results show that the EP-modified liquid structure also tends to be slack and unordered with increasing temperature, which is similar to that of the unmodified. However, the quantitative characterization denoted by the liquid structure parameters exhibits their discrepancy. At the modifying temperature of 750°C, the order degree of EP-modified liquid aluminum is remarkably strengthened and the value of average atomic number per cluster changes from 119 (no EP) up to 174 (EP) by an increase of 46%. These tests experimentally testified Wang’s electric pulse modification (EPM) model that was built only by phenomenology and hereby the mechanism of grain refinement resulting from EPM is further elucidated.

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Heredity of Aluminum Melt by Electric Pulse Modification (II)

Cited by 12 publications

References 3 publications

The investigation of continuous nucleation and refinement of primary Si in Al–30Si mushy zone

The investigation of continuous nucleation and refinement of primary Si in Al–30Si mushy zone

A Calculation Study on the Synthesis Routes of Oh-Al<sub>13 </sub>Cluster

Structural Transformation in Electric Pulse Modified Liquid Aluminum

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