Effects of Nb and W Additions on the Microstructures and Mechanical Properties of Novel gamma/gamma' Co-V-Ti-Based Superalloys

doi:10.3390/met8070563

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	Effects of Nb and W Additions on the Microstructures and Mechanical Properties of Novel gamma/gamma' Co-V-Ti-Based Superalloys
	Liu, XJ ; Pan, YW ; Chen, YC ; Han, JJ ; Yang, SY ; Ruan, JJ ; Wang, CP ; Yang, YS ; Li, YJ
刊名	METALS
	2018-07-01
卷号	8 期号:7 页码:-
关键词	Cobalt-based superalloys gamma prime microstructure evolution high-temperature mechanical properties
ISSN号	2075-4701
DOI	10.3390/met8070563
英文摘要	Microstructures, elemental partition behavior, phase stabilities and mechanical properties of Nb- and W-containing Co-V-Ti-based superalloys were investigated. Elemental partition coefficients (K-X = C-gamma/C gamma) of Nb and W in Co-V-Ti-based superalloys are 2.07 and 1.10, respectively. The gamma' solvus temperatures are determined as 1023 degrees C, 1055 degrees C and 1035 degrees C in Co-12V-4Ti, Co-10V-4Ti-2Nb and Co-10V-4Ti-2W alloys, which are higher than those of Co-9Al-9W alloy (1000 degrees C). The mass densities of quaternary Co-10V-4Ti-2Nb and Co-10V-4Ti-2W alloys are about 8.31 and 8.50 g.cm(-3), respectively, which are 15% lower than Co-Al-W-based superalloys (9.8 g.cm(-3)). All examined alloys exhibit an anomalous positive dependence on temperature rising from 600 to 750 degrees C. Strengths of all examined alloys are higher than those of MarM509 (traditional Cobalt-based superalloy) and Co-9Al-9W at all temperatures that we investigated. The maximum flow stress of Co-V-Ti-Nb alloy is about 638 MPa at 750 degrees C while that of Co-V-Ti-W alloy is about 588 MPa at 700 degrees C.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000445096800093
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80108]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China 2.Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Peoples R China 3.Harbin Inst Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liu, XJ,Pan, YW,Chen, YC,et al. Effects of Nb and W Additions on the Microstructures and Mechanical Properties of Novel gamma/gamma' Co-V-Ti-Based Superalloys[J]. METALS,2018,8(7):-.
APA	Liu, XJ.,Pan, YW.,Chen, YC.,Han, JJ.,Yang, SY.,...&Li, YJ.(2018).Effects of Nb and W Additions on the Microstructures and Mechanical Properties of Novel gamma/gamma' Co-V-Ti-Based Superalloys.METALS,8(7),-.
MLA	Liu, XJ,et al."Effects of Nb and W Additions on the Microstructures and Mechanical Properties of Novel gamma/gamma' Co-V-Ti-Based Superalloys".METALS 8.7(2018):-.