Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys

doi:10.1016/j.msea.2021.141776

CORC > 金属研究所 > 中国科学院金属研究所

	Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys
	Qu, Shasha 1,3; Li, Yingju 3; Tong, Min 3; Wang, Cuiping 2,4; Yang, Yuansheng 3
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2021-08-17
卷号	823 页码:11
关键词	CoNi-Base superalloy Microstructural evolution Coarsening kinetics Compression deformation Dislocation structure
ISSN号	0921-5093
DOI	10.1016/j.msea.2021.141776
通讯作者	Li, Yingju(yjli@imr.ac.cn) ; Yang, Yuansheng(ysyang@imr.ac.cn)
英文摘要	The coarsening behavior of the gamma' precipitates and compression deformation mechanism of the gamma'-strengthened CoNi-base superalloys are investigated. By substituting 1 at.% Ta for 1 at.% W, the 4W2Ta alloy exhibits a higher gamma' solvus temperature of 1218 degrees C and a lower mass density of 8.93 g/cm3. During the aging process from 900 to 1000 degrees C, both of the 5W1Ta and 4W2Ta alloys show stable gamma/gamma' two-phase microstructure. The coarsening behavior of the gamma' precipitates in the two alloys follows the classical Lifshitz-Slyozov-Wagner (LSW) model. The coarsening rate constant of the 4W2Ta alloy is approximately two times lower than that of the 5W1Ta alloy, which is attributed to its larger lattice mismatch due to the addition of Ta. Besides, compared with the 5W1Ta alloy, the 4W2Ta alloy has higher high-temperature strength and shows different deformation behavior. When the deformation temperature is lower than 800 degrees C, pairs of dislocations shear the gamma' precipitates and gamma matrix. At 800 degrees C, stacking faults (SFs) appear in the gamma' precipitates and increase with the increasing temperature, whereas most of dislocations bypass the gamma' precipitates at 1000 degrees C.
资助项目	National Natural Science Foundation of China[51831007] ; National Science and Technology Major Project[2017-VI-0003-0073] ; Key Research and Development Program of Liaoning Province[2019JH2/10100009]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000682358100003
资助机构	National Natural Science Foundation of China ; National Science and Technology Major Project ; Key Research and Development Program of Liaoning Province
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159559]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Yingju; Yang, Yuansheng
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Peoples R China
推荐引用方式 GB/T 7714	Qu, Shasha,Li, Yingju,Tong, Min,et al. Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,823:11.
APA	Qu, Shasha,Li, Yingju,Tong, Min,Wang, Cuiping,&Yang, Yuansheng.(2021).Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,823,11.
MLA	Qu, Shasha,et al."Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 823(2021):11.