Directional solidification behavior of turbine blades in DZ125 alloy:design of blade numbers on assembly

作     者：Yong Shang Yan-Ling Pei Sheng-Kai Gong Yi Ru Yuan-Chao Yu Ru-Hao Zhou Shu-Suo Li Hui-Bin Xu Yong Shang;Yan-Ling Pei;Sheng-Kai Gong;Yi Ru;Yuan-Chao Yu;Ru-Hao Zhou;Shu-Suo Li;Hui-Bin Xu

作者机构：School of Materials Science and EngineeringBeihang UniversityBeijing 100191China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第5期

页      面：1134-1144页

核心收录：

学科分类：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）] 

基　　金：financially supported by the National Natural Science Foundations of China(Nos.U1435207 and 51771007) the National Key Research and Development Program of China(No.2017YFA0700700) China Postdoctoral Science Foundation(No.2018M631305) 

主　　题：Directional solidification Superalloy ProCAST Interfacial heat transfer coefficient 

摘      要：The influence of blades assembly,i.e.,the blade number on the solidification process,heat exchange and grain structure on a directionally solidified Ni-based superalloy DZ125 was investigated by combining the experimental and simulation *** casting process was simulated thermodynamically by ProCAST software,where the interface heat transfer coefficient was precisely determined by a measurement with *** is a good agreement between experimental and simulation *** was interestingly found that with the number of blades increasing from 6 to 10,due to the decrease in radiation absorption efficiency,the maximum temperature and the heating rate decrease in the mold,during the preheat *** the withdrawal procedure,increased assembly numbers reduce the radiation exchange from mold to the enclosure,resulting in the decrease in cooling rate and temperature gradient of the *** the end of withdrawal,the slower cooling rate of the outside balances the temperature distribution of internal and external surfaces on the rabbet of blade.