Effects of Permanent Magnetic Field on Secondary Dendrite Arm Spacing and Precipitate of Gold Alloy

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Effects of Permanent Magnetic Field on Secondary Dendrite Arm Spacing and Precipitate of Gold Alloy
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                        zhangjunkaizhangjunkai

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liyingliying

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Fund Project:The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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Abstract:

In this work, the permanent magnetic field was applied to prepare gold alloy and the influences of permanent magnetic field on secondary dendrite arm spacing and precipitate of gold alloy was also discussed. The results show that the rotating magnetic field remarkably refined the microstructure and reduced secondary dendrite arm space of gold alloy. However, a too high rotating speed can increase the skin effect of the molten metal and lower the magnetic flux density of the centre, thereby increasing secondary dendrite arm space. The area fractions of α2 can be increased by rotating magnetic field. At 300r/min, the gold alloy had the highest area fractions of α2, which was 59.4% higher than without permanent magnetic field.

Key words:permanent magnetic field; precipitate; gold alloy; secondary dendrite arm spacing

Reference

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[zhangjunkai, liying. Effects of Permanent Magnetic Field on Secondary Dendrite Arm Spacing and Precipitate of Gold Alloy[J]. Rare Metal Materials and Engineering,2018,47(9):2857~2860.]
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Received:November 13,2016
Revised:January 05,2017
Adopted:March 16,2017
Online: November 01,2018
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