SOLIDIFICATION OF NICKEL-BASED SINGLE CRYSTAL SUPERALLOY BY ELECTRIC FIELD

作     者：Y.S. Yang X.H. Feng G.F. Cheng Y.J. Li Z.Q. Hu 

作者机构：Institute of Metal Research The Chinese Academy of Sciences Shenyang 110016China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2005年第18卷第6期

页      面：679-685页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(No.50374062) the Science and Technology Foundation of Liaoning(No.20032015) 

主　　题：single crystal superalloy DC electric field crystal growth segregation,γ' phase 

摘      要：The crystal growth of a nickel-based single crystal superalloy DD3 was researched via controlled directional solidification under the action of a DC electric field. The cellular or dendrite spacing of the single crystal superalloy is refined and microsegregation of alloying elements Al, Ti, Mo and W, is reduced by the electric field. The electric field decreases the interface stability and reduces the critical growth rate of the ceUular-dendritic translation because of Thomson effect and Joule heating. The precipitation of the γ＇ phase is more uniform and the size of the γ＇ phase is smaller with the electric field than that without the electric field.