Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit
文献类型：期刊论文
| 作者 | Tao, Xipeng; Wang, Xinguang; Li, Jinguo; Sun, Xiaofeng; Zhou, Yizhou |
| 刊名 | SCRIPTA MATERIALIA
 |
| 出版日期 | 2025-01-15 |
| 卷号 | 255页码:7 |
| 关键词 | Abnormal densification Dislocation networks Creep deformation Single crystal superalloy gamma / gamma ' lattice misfit |
| ISSN号 | 1359-6462 |
| DOI | 10.1016/j.scriptamat.2024.116399 |
| 通讯作者 | Tao, Xipeng(xptao19b@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn) |
| 英文摘要 | Generally, with a large lattice misfit, dislocations tend to move smoothly via cross-slip in gamma channels, and rapidly reorient themselves from the (110 ) to (100 ) direction on the surface of gamma ' ' cuboids to form complete networks in single-crystal superalloys. However, in this study, dense and complete dislocation networks also formed in a single-crystal superalloy with a small gamma/gamma ' ' lattice misfit during high-temperature creep deformation. The abnormal densification of dislocation networks was proven to be related to the anomalous enrichment of W and Ta in gamma ' ' phases during the secondary creep stage. Microstructural analysis suggested that anomalous enrichment contributed to an elevated antiphase boundary energy (APBE) of gamma ' ' phases and led to more vacancies within the gamma phase, promoting dislocation climb. The higher APBE of gamma ' ' phases impeded dislocations from cutting into gamma ' ' phases, providing enough time for interfacial dislocations to climb through vacancies and rotate to form dense dislocation networks. |
| 资助项目 | National Key Research and Devel-opment Program of China[2017YFA0700704] ; Excellent Youth Foundation of Liaoning Province[2021-YQ-02] ; Science Center for Gas Turbine Project[P2021-A-IV--002-002] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001327654900001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Key Research and Devel-opment Program of China ; Excellent Youth Foundation of Liaoning Province ; Science Center for Gas Turbine Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Tao, Xipeng; Zhou, Yizhou |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tao, Xipeng,Wang, Xinguang,Li, Jinguo,et al. Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit[J]. SCRIPTA MATERIALIA,2025,255:7. |
| APA | Tao, Xipeng,Wang, Xinguang,Li, Jinguo,Sun, Xiaofeng,&Zhou, Yizhou.(2025).Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit.SCRIPTA MATERIALIA,255,7. |
| MLA | Tao, Xipeng,et al."Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit".SCRIPTA MATERIALIA 255(2025):7. |
入库方式： OAI收割
来源：金属研究所
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