Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium
文献类型：期刊论文
| 作者 | Han, G. M.1,2; Zhao, Y. F.1,2; Zhou, C. B.3; Lin, De-Ye1,2,4; Zhu, X. Y.1,2; Zhang, J.3; Hu, S. Y.5; Song, H. F.1,2,4 |
| 刊名 | Acta materialia
 |
| 出版日期 | 2019-02-15 |
| 卷号 | 165页码:528-546 |
| ISSN号 | 1359-6454 |
| 关键词 | Delta-hydride Stacking structure formation and transition Interfacial energy anisotropy Elastic interaction Phase-field model |
| DOI | 10.1016/j.actamat.2018.12.009 |
| 通讯作者 | Hu, s. y.(shenyang.hu@pnnl.gov) ; Song, h. f.(song_haifeng@iapcm.ac.cn) |
| 英文摘要 | Delta-hydride structures in zr nuclear fuel-rod cladding significantly affect mechanical properties. a micromechanical phase-field model is developed to investigate the effect of interfacial energy anisotropy and elastic interaction on the nucleation, stacking structure formation, and stacking structure transition of delta-hydrides. it is found that the nucleation probability and growth of delta-hydride near pre-existing hydrides are strongly spatially dependent. results show that (1) the delta-hydride has a platelet-like shape. the large shear deformation associated with lattice mismatches and a small interfacial energy of its broad interface cause the orientation of the delta-hydride off the basal plane approximately 14.7 degrees. (2) stress-induced nucleation of delta-hydrides near a pre-existing hydride results in the unique stacking structure formation. (3) the morphology and alignment of stacking structures, called as macroscopic hydrides which consist of microscopic hydrides with certain stacking sequences, change under stresses. the alignment of macroscopic hydrides changes from along the circumferential direction to along the radial direction under tensile hoop stress while the orientation of microscopic hydrides remains parallel to the basal plane. these results are in agreement with experimental observations. the simulations reveal that stress-induced heterogeneous nucleation and growth is the mechanism for the formation and transition of unique macro-hydride stacking structures. (c) 2018 acta materialia inc. published by elsevier ltd. all rights reserved. |
| WOS关键词 | LAMELLAR STRUCTURE FORMATION ; MARTENSITIC-TRANSFORMATION ; MECHANICAL-PROPERTIES ; STRESS-REORIENTATION ; COMPUTER-SIMULATION ; ELASTIC INTERACTION ; NUCLEUS FORMATION ; FORMATION PATH ; STRAIN-ENERGY ; IN-SITU |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS类目 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000457665100047 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374264 |
| 专题 | 计算机网络信息中心 |
| 通讯作者 | Hu, S. Y.; Song, H. F. |
| 作者单位 | 1.Inst Appl Phys & Computat Math, Fenghao East Rd 2, Beijing 100094, Peoples R China 2.CAEP Software Ctr High Performance Numer Simulat, Huayuan Rd 6, Beijing 100088, Peoples R China 3.Chinese Acad Sci, Comp Network Informat Ctr, Beijing 100080, Peoples R China 4.Inst Appl Phys & Computat Math, Lab Computat Phys, Huayuan Rd 6, Beijing 100088, Peoples R China 5.Pacific Northwest Natl Lab, POB 999, Richland, WA 99352 USA |
| 推荐引用方式 GB/T 7714 | Han, G. M.,Zhao, Y. F.,Zhou, C. B.,et al. Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium[J]. Acta materialia,2019,165:528-546. |
| APA | Han, G. M..,Zhao, Y. F..,Zhou, C. B..,Lin, De-Ye.,Zhu, X. Y..,...&Song, H. F..(2019).Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium.Acta materialia,165,528-546. |
| MLA | Han, G. M.,et al."Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium".Acta materialia 165(2019):528-546. |
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