Atomic-scale mechanisms of He/V ratio effect on helium bubble hardening in iron for neutron irradiated F/M steels
文献类型：期刊论文
| 作者 | Shi, Jingyi1,2,3; Liu, Xing4; Peng, Lei3; Huang, Jianjun1; Sun, Huibin2; Li, Jiangang1,5
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| 刊名 | JOURNAL OF NUCLEAR MATERIALS
 |
| 出版日期 | 2020-12-15 |
| 卷号 | 542 |
| 关键词 | Helium bubble Hardening Ferritic/martensitic steel Helium-to-vacancy ratio Molecular dynamics |
| ISSN号 | 0022-3115 |
| DOI | 10.1016/j.jnucmat.2020.152495 |
| 通讯作者 | Peng, Lei(penglei@ustc.edu.cn) |
| 英文摘要 | The helium-to-vacancy (He/V) ratio is a key factor related to the helium bubble hardening mechanisms induced by neutron irradiation in ferritic/martensitic (F/M) steels as advanced nuclear structural materials. According to the helium bubble hardening results in F/M steel irradiated in the spallation neutron source, the interactions between a 1/2 < 111 >{110} edge dislocation and helium bubbles with various sizes of 0.7-3.0 nm in bcc-Fe under irradiation temperatures and room temperature was investigated by using molecular dynamics simulation. The effect of various He/V ratios in the ranges of zero to the highest He/V ratios, 1.85-4.0 of stable helium bubbles with no dislocation loop emission, on the interaction mechanisms was analyzed. The results indicated that the critical resolved shear stress (CRSS) drops rapidly to a very low stress level, and immediately bottoms out and rebounds to a very high stress level, when the He/V ratio increases from 1.0 to the highest He/V ratio. The significant change of CRSS values is not only related to the climbing degree of dislocation after releasing, but also related to the moment when the climb appears. A new repulsion mechanism of interaction between dislocation and bubble was proposed to elucidate the abnormal phenomena of the bottoming rebound of CRSS with a great climbing degree, according to the repelling interaction between helium bubble and superjog of dislocation with both strong compressive stress field. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS关键词 | EDGE DISLOCATION ; BEHAVIOR ; SIMULATION ; DYNAMICS |
| 资助项目 | National Natural Science Foundation of China[11805131] ; National Natural Science Foundation of China-NSAF[U1730123] ; International Partnership Program of Chinese Academy of Sciences[Y16YZ17271] |
| WOS研究方向 | Materials Science ; Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000583242500042 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China-NSAF ; International Partnership Program of Chinese Academy of Sciences |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/105145]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Peng, Lei |
| 作者单位 | 1.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 2.Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China 3.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230027, Anhui, Peoples R China 4.Southwestern Inst Phys, Chengdu 610041, Sichuan, Peoples R China 5.Chinese Acad Sci, Inst Plasma Phys, Hefei 330031, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, Jingyi,Liu, Xing,Peng, Lei,et al. Atomic-scale mechanisms of He/V ratio effect on helium bubble hardening in iron for neutron irradiated F/M steels[J]. JOURNAL OF NUCLEAR MATERIALS,2020,542. |
| APA | Shi, Jingyi,Liu, Xing,Peng, Lei,Huang, Jianjun,Sun, Huibin,&Li, Jiangang.(2020).Atomic-scale mechanisms of He/V ratio effect on helium bubble hardening in iron for neutron irradiated F/M steels.JOURNAL OF NUCLEAR MATERIALS,542. |
| MLA | Shi, Jingyi,et al."Atomic-scale mechanisms of He/V ratio effect on helium bubble hardening in iron for neutron irradiated F/M steels".JOURNAL OF NUCLEAR MATERIALS 542(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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