Unveiling the Re effect on long-term coarsening behaviors of ? ' precipitates in Ni-based single crystal superalloys

doi:10.1016/j.actamat.2022.117979

CORC > 金属研究所 > 中国科学院金属研究所

	Unveiling the Re effect on long-term coarsening behaviors of ? ' precipitates in Ni-based single crystal superalloys
	Lu, Fan 4; Antonov, Stoichko 3; Lu, Song 4; Zhang, Jiachen 2; Li, Longfei 4; Wang, Dong 1; Zhang, Jian 1; Feng, Qiang 4
刊名	ACTA MATERIALIA
	2022-07-01
卷号	233 页码:16
关键词	Nickel-based single crystal superalloy Rhenium-effect Long-term thermal exposure Atom-probe tomography Coarsening kinetics
ISSN号	1359-6454
DOI	10.1016/j.actamat.2022.117979
通讯作者	Li, Longfei(lilf@skl.ustb.edu.cn) ; Feng, Qiang(qfeng@skl.ustb.edu.cn)
英文摘要	In response to the increased demand for very long-term service reliability of industrial gas turbine (IGT) blades, the microstructural stability of two single crystal (SX) superalloys with different Re addition (0Re and 2Re in wt.%, named as alloy 0Re5Ta and 2Re5Ta) were investigated during long-term thermal exposure ( > 50 0 0 h) at 900 degrees C, with the help of atom probe tomography (APT) and high-temperature X-ray diffraction (XRD) analysis. During long-term thermal exposure, the gamma ' precipitates coarsened gradually in both alloys. At the same time, the gamma ' precipitates became more cuboidal for alloy 0Re5Ta and nearly spherical for alloy 2Re5Ta due to the increased positive lattice misfit for alloy 0Re5Ta and the decreased negative lattice misfit for alloy 2Re5Ta. Such lattice misfit evolution was mainly attributed to the inversion of the W partitioning from gamma matrix to gamma ' precipitates over time. The addition of Re can effectively decrease the coarsening rate during thermal exposure. Further investigations on the coarsening kinetics confirmed the Re effect on reducing the interfacial energy and enhancing the rate-limiting effect of Cr. Additional particle size distributions (PSDs) showed a gradual transition from the initial matrixdiffusion coarsening-controlled mechanism to the interface-diffusion coarsening-controlled mechanism at prolonged time, wherein Re triggered the interface-diffusion mechanism earlier by leading to sharper interfaces. Although Re increases the magnitude of the lattice misfit in the initial microstructure, it can significantly enhance the microstructural stability of SX superalloys for IGT application.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	National Science and Technology Major Project[2017-VI-0 0 02-0 072] ; National Natural Science Foundation of China[51631008] ; National Natural Science Foundation of China[91860201] ; Key-Area Re-search and Development Program of Guangdong Province[:2019B010943001] ; 111 Project[B170 0 03] ; Alexander von Humboldt Foundation
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000799051000005
资助机构	National Science and Technology Major Project ; National Natural Science Foundation of China ; Key-Area Re-search and Development Program of Guangdong Province ; 111 Project ; Alexander von Humboldt Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174230]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Longfei; Feng, Qiang
作者单位	1.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China 2.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xi'an 710072, Peoples R China 3.Max Planck Inst Eisenforschung GmbH, Dept Microstruct Phys & Alloy Design, D-40237 Dusseldorf, Germany 4.Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Lu, Fan,Antonov, Stoichko,Lu, Song,et al. Unveiling the Re effect on long-term coarsening behaviors of ? ' precipitates in Ni-based single crystal superalloys[J]. ACTA MATERIALIA,2022,233:16.
APA	Lu, Fan.,Antonov, Stoichko.,Lu, Song.,Zhang, Jiachen.,Li, Longfei.,...&Feng, Qiang.(2022).Unveiling the Re effect on long-term coarsening behaviors of ? ' precipitates in Ni-based single crystal superalloys.ACTA MATERIALIA,233,16.
MLA	Lu, Fan,et al."Unveiling the Re effect on long-term coarsening behaviors of ? ' precipitates in Ni-based single crystal superalloys".ACTA MATERIALIA 233(2022):16.