Non-equilibrium Solidification and Microsegregation Mechanism Based on Interface Evolution and Discrete Crystal Growth

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• 作者：Xiaoping Ma (1)
  Dianzhong Li (1)
  
  1. Shenyang National Laboratory for Materials Science ; Institute of Metal Research ; Chinese Academy of Sciences ; Shenyang ; 110016 ; P.R. China
  
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：46
• 期：2
• 页码：549-555
• 全文大小：1,109 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Structural Materials
  Physical Chemistry
  Ceramics,Glass,Composites,Natural Materials
  
• 出版者：Springer Boston
• ISSN：1543-1940

文摘

The interface layer and discrete crystal growth in solidification are traced by analyzing the microsegregation of aluminum alloy. Based on the interface evolution and discrete crystal growth, the non-equilibrium microsegregation mechanism is qualitatively proposed. The solute content of solid is decided by the solidification temperature of interface. And the solidification temperature of interface is further decided by the evolution of interface compositions and interface temperature. The fluctuation of interface compositions and actual interface temperature persists in the whole solidification process.