Weak boundary enabled tensile ductility in dealloyed porous Fe alloy
文献类型：期刊论文
| 作者 | Xie, Hui; Shao, Jun-Chao; Zou, Lijie; Jin, Hai-Jun |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2023-01-15 |
| 卷号 | 243页码:11 |
| ISSN号 | 1359-6454 |
| 关键词 | Dealloying Porous or nanoporous materials Tensile ductility Weak boundaries Micro-cracks |
| DOI | 10.1016/j.actamat.2022.118501 |
| 通讯作者 | Jin, Hai-Jun(hjjin@imr.ac.cn) |
| 英文摘要 | Dealloying has emerged as a new route to the synthesis of porous or nanoporous materials for a variety of novel structural/functional applications. However, dealloyed (nano-)porous metals are notoriously brit-tle and often fracture catastrophically in bending or tension, which is detrimental to their applications. In this paper, we report that under tension, the irreversible fracture strain (epsilon i) of a macroscopic porous Fe(MnCr) alloy prepared by liquid metal dealloying can be enhanced from nearly zero to 4.1 % by in-troducing weak domain boundaries, while previous samples with homogeneous (nano-)porous structure usually fracture at epsilon i below 1.0 % . Tensile ductility is enhanced only if the mean domain size ( D ) is not too much larger than mean ligament diameter ( L ), evidenced by the dramatic increase in epsilon i as D/L de-creases from-24 to-7. The "ductile" deformation of these materials is associated with the diffuse failure under tension, arising from the promoted nucleation of micro-cracks and the crack deflection or branch-ing along weak domain boundaries at lower D / L . This strategy might also apply to other (nano-)porous materials self-organized in dealloying or fabricated by other methods.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 资助项目 | National Natural Science Founda- tion of China ; [52101204] ; [51971218] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000900016800008 |
| 资助机构 | National Natural Science Founda- tion of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/175764]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Jin, Hai-Jun |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Hui,Shao, Jun-Chao,Zou, Lijie,et al. Weak boundary enabled tensile ductility in dealloyed porous Fe alloy[J]. ACTA MATERIALIA,2023,243:11. |
| APA | Xie, Hui,Shao, Jun-Chao,Zou, Lijie,&Jin, Hai-Jun.(2023).Weak boundary enabled tensile ductility in dealloyed porous Fe alloy.ACTA MATERIALIA,243,11. |
| MLA | Xie, Hui,et al."Weak boundary enabled tensile ductility in dealloyed porous Fe alloy".ACTA MATERIALIA 243(2023):11. |
入库方式： OAI收割
来源：金属研究所
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