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

文献类型：期刊论文

作者Qu, Shasha4,5; Li, Yingju4; He, Minglin4,5; Wang, Cuiping1,6; Liu, Xingju1,2,3,6; Chen, Yuechao1,6; Yang, Yuansheng4
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2019-07-22
卷号761页码:9
ISSN号0921-5093
关键词CoNi-base superalloy Directional solidification Microstructural stability Compression property Dislocation structures
DOI10.1016/j.msea.2019.138034
通讯作者Yang, Yuansheng(ysyang@imr.ac.cn)
英文摘要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.
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
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000477784900008
资助机构National Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/134689]  
专题金属研究所_中国科学院金属研究所
通讯作者Yang, Yuansheng
作者单位1.Xiamen Univ, Coll Mat, Xiamen 361005, Fujian, Peoples R China
2.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China
3.Harbin Inst Technol, Inst Mat Genome & Big Data, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
5.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
6.Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Fujian, 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.

入库方式： OAI收割

来源：金属研究所

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