Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy
文献类型：期刊论文
| 作者 | Huang, Xingwei2,3; Zhou, Xinzhe3; Wang, Weizhen3; Cui, Chuanyong1; Ye, Hengqiang2; Yang, Zhiqing2,3 |
| 刊名 | SCRIPTA MATERIALIA
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 209页码:6 |
| 关键词 | Superalloy Twin Dislocation Stacking fault Portevin-Le Chatelier effect |
| ISSN号 | 1359-6462 |
| DOI | 10.1016/j.scriptamat.2021.114385 |
| 通讯作者 | Yang, Zhiqing(yangzq@imr.ac.cn) |
| 英文摘要 | 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. |
| 资助项目 | 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研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000721480800011 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Ministry of Science and Technology of China ; Key Research Program of Frontier Sciences, CAS ; Ji Hua Laboratory |
| 源URL | [http://ir.imr.ac.cn/handle/321006/167371]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yang, Zhiqing |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Superalloy Div, Shenyang 110016, Peoples R China 2.Ji Hua Lab, Foshan 528000, Peoples R China 3.Univ Sci & Technol China, Chinese Acad Sci, Sch Mat Sci & Engn, Inst Met Res,Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：金属研究所
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