A correlative multidimensional study of gamma ' precipitates with Ta addition in Re-containing Ni-based single crystal superalloys

doi:10.1016/j.jmst.2020.10.025

IMR OpenIR

	A correlative multidimensional study of gamma ' precipitates with Ta addition in Re-containing Ni-based single crystal superalloys
	Zhang, Jiachen 1; Huang, Taiwen 1; Cao, Kaili 1; Chen, Jia 1; Zong, Huajing 1; Wang, Dong 2; Zhang, Jian 2; Zhang, Jun 1; Liu, Lin 1
通讯作者	Liu, Lin(linliu@nwpu.edu.cn)
	2021-06-10
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	75 页码:68-77
摘要	The microstructural evolution in Re-containing Ni-based single crystal superalloys with different Tantalum (Ta) content (2Ta, 5Ta and 8Ta in wt %) was investigated. Ta addition significantly affected the gamma' precipitate morphology, gamma/gamma' lattice misfit and microstructural stability during long-term aging. Results showed that the partitioning behaviors of solutes were enhanced by Ta addition, meanwhile, the reversal partitioning behavior of W was triggered which partitioned from gamma' precipitate to gamma matrix. The elemental concentration redistribution caused variations in lattice misfit from positive to negative, the values of lattice misfit were measured to be 0.16 % for 2Ta alloy, then decreased to -0.07 % for 5Ta alloy and negatively increased to -0.23 % for 8Ta alloy. These variations in the lattice misfit were reflected on the transition of gamma' morphology from round-cornered cuboidal shape to cuboidal with sharp corners, accomplished with increasing shape parameter ratio eta. Consequently, the optimal gamma' shape could be obtained at lattice misfit of approximately 0.3 %. The gamma' coarsening investigation at 900 degrees C (up to 2000 h) indicated that Ta addition was beneficial for improving the microstructural stability by reducing the coarsening rate and interfacial energy, accompanied by the enhanced capability of resisting gamma' coalescence. By incorporating the calculated interfacial energy, computational modeling, Thermo-Calc and PrecipiCalc, were employed to elucidate the gamma' kinetic pathways, the simulation results agreed with experiments, indicating that the model and parameters were reasonable. Additionally, it was found that there was no overlap between gamma' nucleation and coarsening when the gamma/gamma' interfacial energy increased to a critical value. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Tantalum Ni-based superalloys Atom probe tomography Lattice misfit Coarsening kinetics
资助者	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Natural Science Foundation of Shaanxi Province
DOI	10.1016/j.jmst.2020.10.025
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51631008] ; National Key Research and Development Program of China[2016YFB0701400] ; Natural Science Foundation of Shaanxi Province[2020JM122]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000640021600008
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：33[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/162319
专题	中国科学院金属研究所
通讯作者	Liu, Lin
作者单位	1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 2.Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jiachen,Huang, Taiwen,Cao, Kaili,et al. A correlative multidimensional study of gamma ' precipitates with Ta addition in Re-containing Ni-based single crystal superalloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,75:68-77.
APA	Zhang, Jiachen.,Huang, Taiwen.,Cao, Kaili.,Chen, Jia.,Zong, Huajing.,...&Liu, Lin.(2021).A correlative multidimensional study of gamma ' precipitates with Ta addition in Re-containing Ni-based single crystal superalloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,75,68-77.
MLA	Zhang, Jiachen,et al."A correlative multidimensional study of gamma ' precipitates with Ta addition in Re-containing Ni-based single crystal superalloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 75(2021):68-77.