Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy

doi:10.1007/s11661-020-05710-7

IMR OpenIR

	Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy
	Fan, Zhongding 1; Wang, Xinguang 2; Yang, Yanhong 2; Chen, Hao 1; Yang, Zhigang 1; Zhang, Chi 1
通讯作者	Zhang, Chi(chizhang@tsinghua.edu.cn)
	2020-05-01
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	51 期号:5 页码:2495-2508
摘要	Exploring the alloying effect of various elements plays a crucial role in optimizing the alloy design for superalloys. In this study, the influence of Nb additions on a gamma '-strengthening CoNi-based superalloy has been investigated. Undesirable intermetallic phases including the topologically close-packed D8(5) phase and the ordered D0(19) phase were observed to preferentially form in the dendritic and interdendritic regions of the investigated alloy, respectively. Precipitation behaviors of the D0(19) phase and the D8(5) phase including growth mechanisms and crystallographic orientation relationships have been characterized and analyzed in detail using advanced electron microscopy techniques. First-principle calculations using density function theory have been carried out to evaluate the effect of Nb additions on the thermodynamic stability of the L1(2)-gamma ' phase. It turns out that the supercell with L1(2) structure would be energetically destabilized when the Nb-substituted atom sits on the Co or Al sites, which could correspond to the microstructural instability of the Nb-containing CoNi-based superalloy.
DOI	10.1007/s11661-020-05710-7
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000523180700044
出版者	SPRINGER
引用统计	被引频次：3[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/321006/138092
专题	中国科学院金属研究所
通讯作者	Zhang, Chi
作者单位	1.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, Minist Educ, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Fan, Zhongding,Wang, Xinguang,Yang, Yanhong,et al. Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2020,51(5):2495-2508.
APA	Fan, Zhongding,Wang, Xinguang,Yang, Yanhong,Chen, Hao,Yang, Zhigang,&Zhang, Chi.(2020).Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,51(5),2495-2508.
MLA	Fan, Zhongding,et al."Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 51.5(2020):2495-2508.