Feature and formation mechanism of inclusions in K4169 Ni-based superalloy

	Feature and formation mechanism of inclusions in K4169 Ni-based superalloy
	Tang, Zhong-Jie 2; Guo, Tie-Ming 1,2; Kou, Sheng-Zhong 1,2; Fu, Ying 2; Jin, Shuo 2
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2015-09-01
卷号	25 期号:9 页码:2403-2413
关键词	Alumina Aluminum oxide Carbides Electrolytic analysis Extraction Inclusions Ingots Iron compounds Magnesia Melting Metals Molybdenum compounds Nickel alloys Nickel compounds Niobium compounds Segregation (metallography) Silica Silicon carbide Solidification Superalloys Titanium carbide Titanium dioxide Titanium nitride Vacuum applications Composite metal oxides Electrolytic extraction Formation mechanism Heterogeneous nucleus Ni-based superalloys Solidification process Spontaneous nucleation Vacuum induction melting
ISSN号	10040609
英文摘要	A method of electrolytic extraction combined with in-situ SEM analysis was utilized to characterize the inclusions in K4169 Ni-based superalloy prepared by vacuum induction melting (VIM). The phases, compositions, morphologies, distribution and formation mechanism of the inclusions were analyzed by SEM in situ analysis. The results indicate that the inclusions of single phase in K4169 include mainly oxide, nitride and carbide(TiN, Al2O3, SiO2, TiO2 and SiC). The inclusions of composite phases include mainly Al2O3-SiO2, Al2O3-MgO, TiC-TiN, TiC-TiO2-TiN, Mo-Ni-Fe-O and Nb-Ni-O. TiN inclusions mainly distribute near the Laves phase. SiC inclusions distribute in the edge of the cast ingots. Most oxide inclusions distribute in the shrinkage cavities which locate at the center of the cast ingots. The inclusions of Si and Al oxides become a new aluminosilicate complex composition inclusion by chemical reaction or mechanical combination in K4169 by the VIM. The composite metal oxide inclusions are precipitated from liquid segregation oxidized during the solidification process. There are two types of nitride inclusions. The one is the TiC-TiN and TiC-TiO2-TiN inclusion which grow by means of spontaneous nucleation. The other one is MgO-Al2O3 which provide a heterogeneous nucleus for the growth of TiN. The composite metal oxide inclusions precipitated from liquid segregation are oxidized during the solidification process. ©, 2015, Central South University of Technology. All right reserved.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112849]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China 2.College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Tang, Zhong-Jie,Guo, Tie-Ming,Kou, Sheng-Zhong,et al. Feature and formation mechanism of inclusions in K4169 Ni-based superalloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2015,25(9):2403-2413.
APA	Tang, Zhong-Jie,Guo, Tie-Ming,Kou, Sheng-Zhong,Fu, Ying,&Jin, Shuo.(2015).Feature and formation mechanism of inclusions in K4169 Ni-based superalloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,25(9),2403-2413.
MLA	Tang, Zhong-Jie,et al."Feature and formation mechanism of inclusions in K4169 Ni-based superalloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 25.9(2015):2403-2413.