Microstructural evolution and compression property of a novel gamma '-strengthened directionally solidified CoNi-base superalloy

doi:10.1016/j.msea.2019.138034

IMR OpenIR

	Microstructural evolution and compression property of a novel gamma '-strengthened directionally solidified CoNi-base superalloy
	Qu, Shasha 1,2; Li, Yingju 1; He, Minglin 1,2; Wang, Cuiping 3,4; Liu, Xingju 3,4,5,6; Chen, Yuechao 3,4; Yang, Yuansheng 1
通讯作者	Yang, Yuansheng(ysyang@imr.ac.cn)
	2019-07-22
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	761 页码:9
摘要	The microstructural evolution and compression property of a novel gamma'-strengthened CoNi-base superalloy have been investigated. The directionally solidified CoNi-base superalloy possesses a lower density of 9.03 g/cm(3) and a higher gamma' solvus temperature of 1166 degrees C, compared with those of the Co-Al-W-base superalloys with high level of W element. After aging at 900-1100 degrees C, the alloy displays stable gamma/gamma' two-phase microstructure with high volume fraction of the gamma' phase, and without detrimental topologically close-packed (TCP) phase. The CoNi-base superalloy shows good compression property. In the process of compression, the alloy exhibits positive temperature dependence of the 0.2% flow stress above 600 degrees C. With increasing temperature, the alloy displays a maximum of 0.2% flow stress of 607 MPa at 850 degrees C. The major deformation mechanisms of the CoNi-base alloy are pairs of a/2 < 110 > -type dislocations shearing gamma' precipitates from room temperature to 850 degrees C and unpaired dislocations bypassing the gamma' precipitates above the peak temperature of 850 degrees C. In this alloy, high content of Ni improves the gamma' solvus temperature and microstructural stability, which leads to a good compression property at high temperatures.
关键词	CoNi-base superalloy Directional solidification Microstructural stability Compression property Dislocation structures
资助者	National Natural Science Foundation of China
DOI	10.1016/j.msea.2019.138034
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51831007]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000477784900008
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：21[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/321006/134690
专题	中国科学院金属研究所
通讯作者	Yang, Yuansheng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.Xiamen Univ, Coll Mat, Xiamen 361005, Fujian, Peoples R China 4.Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Fujian, Peoples R China 5.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China 6.Harbin Inst Technol, Inst Mat Genome & Big Data, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Qu, Shasha,Li, Yingju,He, Minglin,et al. Microstructural evolution and compression property of a novel gamma '-strengthened directionally solidified CoNi-base superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,761:9.
APA	Qu, Shasha.,Li, Yingju.,He, Minglin.,Wang, Cuiping.,Liu, Xingju.,...&Yang, Yuansheng.(2019).Microstructural evolution and compression property of a novel gamma '-strengthened directionally solidified CoNi-base superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,761,9.
MLA	Qu, Shasha,et al."Microstructural evolution and compression property of a novel gamma '-strengthened directionally solidified CoNi-base superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 761(2019):9.