The dislocation-based fatigue deformation mechanism of a RAFM steel under multi-axial loadings
文献类型：期刊论文
| 作者 | Zhao, Yanyun1; Cao, Haibo2; Liu, Shaojun2
|
| 刊名 | JOURNAL OF NUCLEAR MATERIALS
 |
| 出版日期 | 2022 |
| 卷号 | 558 |
| 关键词 | Multi-axial fatigue RAFM steel Cyclic softening/hardening Dislocations |
| ISSN号 | 0022-3115 |
| DOI | 10.1016/j.jnucmat.2021.153324 |
| 通讯作者 | Zhao, Yanyun(zhaoyanyun@ytu.edu.cn) ; Liu, Shaojun(liu5687@inest.cas.cn) |
| 英文摘要 | Reduced Activation Ferritic/Martensitic (RAFM) steel is a candidate blanket material for a fusion reactor, which should have outstanding performance under extreme environments containing complex thermal and stress damage during operation. To date, the properties under a single-axial loading type of tensile, creep and fatigue have been extensively reported, while the multi-axial loadings were rarely studied. Here, the multi-axial fatigue behaviors of a RAFM steel were investigated in an axial-torsional cyclic tester with controlled strain and different loading paths. The results show that the fatigue behavior of the RAFM is strongly determined by the shear-stress condition, where the lifetime under the pure torsional loading is only 16% of the uniaxial cyclic loading one. The fatigue life of the specimens under multi-axial loadings with a phase angle of 0 degrees or 180 degrees are comparable to that of uniaxial tension-compression one. However, it was decreased by similar to 28% as the loading angle changed to 90 degrees with a circular path. Besides, we found the fatigue softening under the proportional multi-axial loading while additional hardening in the non-proportionally multi-axial cyclic loading related to the dislocation activities during loadings. Under the proportional-multiaxial loading and uniaxial tension-compression loading and torsion loading, the high density of dislocation was rearranged and annihilated by the cyclic shear stress, while the tempered martensite lath structure was mainly retained. However, under the non-proportional multi-axial loading, dislocations transform the lath structure into a finer cell structure, improving the resistance upon fatigue deformation. (C) 2021 Elsevier B.V. All rights reserved. |
| WOS关键词 | LOW-CYCLE FATIGUE ; FERRITIC-MARTENSITIC STEELS ; CLAM STEEL ; MODIFIED 9CR-1MO ; BEHAVIOR ; MICROSTRUCTURE ; EVOLUTION ; DESIGN ; SLIP |
| 资助项目 | National Natural Science Founda-tion of China[51601190] |
| WOS研究方向 | Materials Science ; Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000710118900002 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Founda-tion of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/125726]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhao, Yanyun; Liu, Shaojun |
| 作者单位 | 1.Yantai Univ, Coll Nucl Equipment & Nucl Engn, Yantai 264005, Shandong, Peoples R China 2.Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Yanyun,Cao, Haibo,Liu, Shaojun. The dislocation-based fatigue deformation mechanism of a RAFM steel under multi-axial loadings[J]. JOURNAL OF NUCLEAR MATERIALS,2022,558. |
| APA | Zhao, Yanyun,Cao, Haibo,&Liu, Shaojun.(2022).The dislocation-based fatigue deformation mechanism of a RAFM steel under multi-axial loadings.JOURNAL OF NUCLEAR MATERIALS,558. |
| MLA | Zhao, Yanyun,et al."The dislocation-based fatigue deformation mechanism of a RAFM steel under multi-axial loadings".JOURNAL OF NUCLEAR MATERIALS 558(2022). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。