Microstructure evolution and impact toughness degradation of a 3.6%Si austenitic stainless steel during high-temperature exposure
文献类型：期刊论文
| 作者 | Su, Yuanfei1,2,3; Shi, Xianbo1,3; Zhang, Shuzhan1,2,3; Jiao, Shengxuan1,2,3; Yan, Wei1,3; Rong, Lijian1,3 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 913页码:17 |
| 关键词 | Si-modified austenitic stainless steel Thermal aging Microstructure evolution Impact toughness |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2024.147063 |
| 通讯作者 | Yan, Wei(weiyan@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn) |
| 英文摘要 | Si-modified Fe-Cr-Ni austenitic stainless steel is a promising candidate structural material in lead-cooled fast reactor systems and high-temperature microstructural stability is the challenge for developing this kind of materials. In the present research, the microstructure and corresponding impact toughness evolutions of a 3.6 wt%Si austenitic stainless steel (3.6Si-ASS) aged between 510 and 650 degrees C up to 5000 h were investigated. It was found that the microstructure showed nearly no change within 2000 hat 510 degrees C. Subsequently, the G-phase (Cr3Ni2Si) 3 Ni 2 Si) began to form at grain boundaries after 3000 h. This made the matrix near grain boundaries Ni-depleted and promoted the formation of ferrite. Finally, a mixed microstructure consisting of G-phase and ferrite was formed after 5000 h. The appearance of ferrite caused a slight decrease in impact toughness. This evolution was further accelerated during aging at 550 degrees C, and the impact toughness showed a significant decrease when ferrite appeared. Interestingly, the G-phase and ferrite were suppressed, replaced by intergranular M6C 6 C ((Cr, Mo)3Ni2SiC) 3 Ni 2 SiC) carbide and intragranular (Cr, Si, Mo)-rich chi-phase during aging at 600 and 650 degrees C. Herein, M6C 6 C carbides preferred to form at grain boundaries, making intergranular cracking easier and reducing the toughness. When aged at 650 degrees C, the higher diffusion rates of Cr, Ni, Si and Mo increase grain boundaries coverage of M6C 6 C and also the number density, diameter, and area fraction of the chi-phase. |
| 资助项目 | LingChuang Research Project of China National Nuclear Corporation ; Natural Science Foundation of Liaoning Province[2023-MS-019] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001293290600001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | LingChuang Research Project of China National Nuclear Corporation ; Natural Science Foundation of Liaoning Province |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yan, Wei; Rong, Lijian |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Yuanfei,Shi, Xianbo,Zhang, Shuzhan,et al. Microstructure evolution and impact toughness degradation of a 3.6%Si austenitic stainless steel during high-temperature exposure[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,913:17. |
| APA | Su, Yuanfei,Shi, Xianbo,Zhang, Shuzhan,Jiao, Shengxuan,Yan, Wei,&Rong, Lijian.(2024).Microstructure evolution and impact toughness degradation of a 3.6%Si austenitic stainless steel during high-temperature exposure.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,913,17. |
| MLA | Su, Yuanfei,et al."Microstructure evolution and impact toughness degradation of a 3.6%Si austenitic stainless steel during high-temperature exposure".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 913(2024):17. |
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。