| Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys | |
| Liu, J.1,2; Yu, J. J.1; Yang, Y. H.1; Zhou, Y. Z.1; Sun, X. F.1 | |
| Corresponding Author | Yu, J. J.(jjyu@imr.ac.cn) ; Yang, Y. H.(yhyang@imr.ac.cn) |
| 2019-02-04 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 745Pages:404-410 |
| Abstract | The solidification paths, microstructures and mechanical properties of two Co-Al-W base superalloys with different additions of tungsten and molybdenum were investigated. Mo addition does not influence the volume fraction of the gamma' phase; however, the morphology of the gamma' phase changes from cuboidal to near cuboidal. The mu phase and beta phase were identified in both alloy systems. Although the melting point of the mu phase is decreased by Mo addition, the solidification paths remain the same: L -> L-1 + gamma -> L-2 + gamma + mu -> gamma + mu + beta -> gamma + mu + beta + gamma' . The precipitation of a gamma' phase envelop around the interdendritic regions in Co-Al-W alloy systems has never been reported. The formation of a surrounding gamma' phase was caused by the diffusion of elements between secondary phases and the substrate during the heat treatments. The microhardness of the mu phase, which can be easily influenced by Mo addition, is the highest in both alloys, followed by the microhardnesses of the beta phase and the substrate. In the fracturing process, microcracks were generated in the mu phase, the number of which increased with Mo addition. |
| Keyword | Co-base superalloys Molybdenum Microstructures Tensile behavior Solidification path |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China (NSFC) |
| DOI | 10.1016/j.msea.2018.11.087 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2017YFA0700704] ; National Natural Science Foundation of China (NSFC)[51571196] ; National Natural Science Foundation of China (NSFC)[51701210] ; National Natural Science Foundation of China (NSFC)[51771191] ; National Natural Science Foundation of China (NSFC)[51601192] ; National Natural Science Foundation of China (NSFC)[51701212] ; National Natural Science Foundation of China (NSFC)[51671188] |
| 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:000457819400043 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/131856 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yu, J. J.; Yang, Y. H. |
| 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 |
| Recommended Citation GB/T 7714 | Liu, J.,Yu, J. J.,Yang, Y. H.,et al. Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,745:404-410. |
| APA | Liu, J.,Yu, J. J.,Yang, Y. H.,Zhou, Y. Z.,&Sun, X. F..(2019).Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,745,404-410. |
| MLA | Liu, J.,et al."Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 745(2019):404-410. |
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