Precipitation behavior of G-phase and its effect on mechanical properties of 30Cr2Ni4MoV steel
文献类型：期刊论文
| 作者 | Zheng, Yongfeng1,2; Hu, Xiaofeng1; Jiang, Haichang1; Song, Yuanyuan1; Rong, Lijian1 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2025 |
| 卷号 | 219页码:13 |
| 关键词 | 30Cr2Ni4MoV steel Precipitation behavior G -phase Mechanical property Aging embrittlement |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2024.114598 |
| 通讯作者 | Hu, Xiaofeng(xfhu@imr.ac.cn) ; Jiang, Haichang(hcjiang@imr.ac.cn) |
| 英文摘要 | Precipitation behavior of G-phase and its effect on mechanical properties of 30Cr2Ni4MoV steel during thermal aging at 350-600 degrees C for 0-10,000 h are investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), atom probe tomography (APT), hardness and impact tests. Aging at 500 degrees C, the martensitic matrix of 30Cr2Ni4MoV steel basically keeps stable. With the lath width almost remaining unchanged, carbides coarsen to a slight degree, but G-phase will precipitate at grain boundary (GB). The G-phase is Ni16Mn6Si7 and its "nose" temperature is around 500-550 degrees C. Due to relatively high enrichment level of forming elements including Ni, Mn and Si at GB, the G-phase can nucleate at triple junction or adjacent to M23C6 at GB. Subsequently, the G-phase grows along GB until contacts with M23C6, and then coarsens along the width direction, which results in alternating distribution morphology of G-phase and M23C6 at GB. The Vickers hardness results show that the hardness remains stable due to the relatively stable microstructure after aging. After aging for 10,000 h, the hardness undergoes little decrease due to the slight coarsening of M23C6 and G-phase. Interestingly, the impact energy drops obviously after the precipitation of G-phase. The reason is that the G-phase at GB promotes the initiation and propagation of cracks during the impact process, leading to intergranular fracture (IGF). |
| 资助项目 | Youth Innovation Promotion Association CAS[Y2021059] ; LingChuang Research Project of China National Nuclear Corporation, the Experimental certification project in the pilot base[2022JH24/10200034] ; Liaoning Unveiling and Commanding Program[2022JH1/10400017] ; Innovation Foundation of IMR, CAS[2022-PY13] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001383371400001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | Youth Innovation Promotion Association CAS ; LingChuang Research Project of China National Nuclear Corporation, the Experimental certification project in the pilot base ; Liaoning Unveiling and Commanding Program ; Innovation Foundation of IMR, CAS |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Hu, Xiaofeng; Jiang, Haichang |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Yongfeng,Hu, Xiaofeng,Jiang, Haichang,et al. Precipitation behavior of G-phase and its effect on mechanical properties of 30Cr2Ni4MoV steel[J]. MATERIALS CHARACTERIZATION,2025,219:13. |
| APA | Zheng, Yongfeng,Hu, Xiaofeng,Jiang, Haichang,Song, Yuanyuan,&Rong, Lijian.(2025).Precipitation behavior of G-phase and its effect on mechanical properties of 30Cr2Ni4MoV steel.MATERIALS CHARACTERIZATION,219,13. |
| MLA | Zheng, Yongfeng,et al."Precipitation behavior of G-phase and its effect on mechanical properties of 30Cr2Ni4MoV steel".MATERIALS CHARACTERIZATION 219(2025):13. |
入库方式： OAI收割
来源：金属研究所
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。