| Microstructural evolution and compression property of a novel gamma '-strengthened directionally solidified CoNi-base superalloy | |
| Qu, Shasha1,2; Li, Yingju1; He, Minglin1,2; Wang, Cuiping3,4; Liu, Xingju3,4,5,6; Chen, Yuechao3,4; Yang, Yuansheng1 | |
| Corresponding Author | Yang, Yuansheng(ysyang@imr.ac.cn) |
| 2019-07-22 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 761Pages:9 |
| Abstract | 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. |
| Keyword | CoNi-base superalloy Directional solidification Microstructural stability Compression property Dislocation structures |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1016/j.msea.2019.138034 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51831007] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000477784900008 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/134690 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, Yuansheng |
| Affiliation | 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 |
| Recommended Citation 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. |
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