| Coarsening behavior of gamma ' precipitates and compression deformation mechanism of a novel Co-V-Ta-Ti superalloy | |
| Qu, Shasha1,2; Li, Yingju1; Wang, Cuiping3,4; Liu, Xingjun3,4,5,6; Qian, Kun1,2; Ruan, Jingjing7; Chen, Yuechao3,4; Yang, Yuansheng1 | |
| Corresponding Author | Yang, Yuansheng(ysyang@imr.ac.cn) |
| 2020-06-10 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 787Pages:9 |
| Abstract | The coarsening behavior of gamma' precipitates at different temperatures and the compression deformation mechanism of a novel Co-V-Ta-Ti superalloy are investigated. It is found that the coarsening behavior of the gamma' precipitates follows the classical Lifshitz-Slyozov-Wagner (LSW) model based on measured results of the temporal evolution of the mean radius, volume fraction, and number density of the gamma' precipitates. The coarsening rate constant, K, of the gamma' precipitates is strongly dependent on the aging temperature, and it increases nearly ten times with the aging temperature rising from 800 to 900 degrees C. Within this temperature range, the activation energy for coarsening of the gamma' precipitates is determined to be 230 kJ/mol. This value is close to the activation energy for the diffusion of V in Co, suggesting that the coarsening rate of gamma' precipitates is limited by the diffusion of V element. A lot of slip bands are observed in the alloy after compression deformation, which shows the crystal slip is the primary deformation mechanism for the Co-V-Ta-Ti alloy. It is found that the dislocations bypass the gamma' precipitates below 700 degrees C in the alloy, and pairs of dislocations shear the gamma precipitates with a high density of stacking faults (SFs) above the peak temperature of 700 degrees C. |
| Keyword | Co-V-Ta-Ti alloy Microstructural evolution Coarsening behavior Compression property Deformation mechanism |
| Funding Organization | National Natural Science Foundation of China ; National Science and Technology Major Project |
| DOI | 10.1016/j.msea.2020.139455 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51831007] ; National Science and Technology Major Project[2017-VI-0003-0073] |
| 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:000541741800006 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139546 |
| 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, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China 4.Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Peoples R China 5.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China 6.Harbin Inst Technol, Inst Mat Genome & Big Data, Shenzhen 518055, Peoples R China 7.Tohoku Univ, Grad Sch Engn, Dept Met, Sendai, Miyagi 9808579, Japan |
| Recommended Citation GB/T 7714 | Qu, Shasha,Li, Yingju,Wang, Cuiping,et al. Coarsening behavior of gamma ' precipitates and compression deformation mechanism of a novel Co-V-Ta-Ti superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,787:9. |
| APA | Qu, Shasha.,Li, Yingju.,Wang, Cuiping.,Liu, Xingjun.,Qian, Kun.,...&Yang, Yuansheng.(2020).Coarsening behavior of gamma ' precipitates and compression deformation mechanism of a novel Co-V-Ta-Ti superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,787,9. |
| MLA | Qu, Shasha,et al."Coarsening behavior of gamma ' precipitates and compression deformation mechanism of a novel Co-V-Ta-Ti superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 787(2020):9. |
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