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

doi:10.1016/j.actamat.2022.117979

IMR OpenIR

	Unveiling the Re effect on long-term coarsening behaviors of ? ' precipitates in Ni-based single crystal superalloys
	Lu, Fan 1; Antonov, Stoichko 2; Lu, Song 1; Zhang, Jiachen 3; Li, Longfei 1; Wang, Dong 4; Zhang, Jian 4; Feng, Qiang 1
通讯作者	Li, Longfei(lilf@skl.ustb.edu.cn) ; Feng, Qiang(qfeng@skl.ustb.edu.cn)
	2022-07-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	233 页码:16
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.
关键词	Nickel-based single crystal superalloy Rhenium-effect Long-term thermal exposure Atom-probe tomography Coarsening kinetics
资助者	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
DOI	10.1016/j.actamat.2022.117979
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000799051000005
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：22[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/321006/174231
专题	中国科学院金属研究所
通讯作者	Li, Longfei; Feng, Qiang
作者单位	1.Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China 2.Max Planck Inst Eisenforschung GmbH, Dept Microstruct Phys & Alloy Design, D-40237 Dusseldorf, Germany 3.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xi'an 710072, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, 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.