| Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy | |
| Huang, Xingwei1,2; Zhou, Xinzhe1; Wang, Weizhen1; Cui, Chuanyong3; Ye, Hengqiang2; Yang, Zhiqing1,2 | |
| Corresponding Author | Yang, Zhiqing(yangzq@imr.ac.cn) |
| 2022-03-01 | |
| Source Publication | SCRIPTA MATERIALIA
 |
| ISSN | 1359-6462 |
| Volume | 209Pages:6 |
| Abstract | Influence of microtwins (MTs) on Portevin-Le Chatelier (PLC) effect of a Ni-Co-based superalloy was investigated by tensile tests and transmission electron microscopy. Two groups of samples were pre-strained at 725 degrees C to produce MTs. Existence of MTs improved the alloy's yield strength, but it changed the PLC effect from type-B to type-C, and increased the serration amplitudes by similar to 6 times, during tensile deformation at 400 degrees C. Microstructural characterizations indicate that dislocation-MT interactions lead to break of MTs in both gamma matrix and gamma' precipitates, creating soft channels for dislocation glide. The high serration amplitudes were rationalized on the basis of sudden plastic flow along those soft channels and subsequently strain hardening due to dislocation multiplication. These results demonstrate that MTs influence the PLC effect much more significantly, compared with traditionally accepted dislocation-solute interactions. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | Superalloy Twin Dislocation Stacking fault Portevin-Le Chatelier effect |
| Funding Organization | Ministry of Science and Technology of China ; Key Research Program of Frontier Sciences, CAS ; Ji Hua Laboratory |
| DOI | 10.1016/j.scriptamat.2021.114385 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Ministry of Science and Technology of China[2017YFA0700703] ; Ministry of Science and Technology of China[2019YFA0705304] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC027] ; Ji Hua Laboratory[X210141TL210] |
| 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:000721480800011 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/167372 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, Zhiqing |
| Affiliation | 1.Univ Sci & Technol China, Chinese Acad Sci, Sch Mat Sci & Engn, Inst Met Res,Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Ji Hua Lab, Foshan 528000, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Superalloy Div, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Huang, Xingwei,Zhou, Xinzhe,Wang, Weizhen,et al. Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy[J]. SCRIPTA MATERIALIA,2022,209:6. |
| APA | Huang, Xingwei,Zhou, Xinzhe,Wang, Weizhen,Cui, Chuanyong,Ye, Hengqiang,&Yang, Zhiqing.(2022).Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy.SCRIPTA MATERIALIA,209,6. |
| MLA | Huang, Xingwei,et al."Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy".SCRIPTA MATERIALIA 209(2022):6. |
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