Evolution of precipitate and its effect on the degradation of impact toughness in a carbon and nitrogen-controlled 316 stainless steel during thermal aging at 650 °C
文献类型：期刊论文
| 作者 | Lv, Xinliang1,2; Chen, Shenghu1; Rong, Lijian1 |
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 33页码:3728-3742 |
| 关键词 | Austenitic stainless steel Long-term aging Precipitation Microstructural evolution Impact toughness |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2024.10.043 |
| 通讯作者 | Chen, Shenghu(chensh@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn) |
| 英文摘要 | Impact toughness degradation and microstructure evolution of a carbon and nitrogen-controlled 316 stainless steel during long-term aging at 650 degrees C for up to 8800 h were investigated. The degradation of impact toughness during aging can be divided into three stages: a rapid decrease during stage I (the first 400 h), a slow decrease during stage II (from 400 to 3200 h), and the stable stage during stage III (up to 8800 h). P enrichment at the M23C6/gamma interface is induced by the rejection of P during the formation of M23C6 carbide, and the M23C6/gamma interface is preferred location for crack initiation. An increase in the amount of grain boundary M23C6 carbides increases the crack initiation sites, resulting in a rapid decrease of impact toughness during stage I. The ongoing rejection of Ni and Si during the coarsening of M23C6 carbide is beneficial for the nucleation of M6C carbide. The micro-crack initiation at the M23C6/M6C and M6C/gamma interfaces is introduced, and a semi-continuous network of M23C6 carbide along grain boundary promotes the crack propagation, leading to a further decrease of impact toughness during stage II. The nearly continuous precipitate morphology is induced through continued growth of grain boundary M23C6 and M6C carbides. The propagation of micro-cracks along the M6C/gamma, M23C6/gamma, and M23C6/M6C interfaces leads to the mostly intergranular fracture, thus the impact energy tends to be stable during stage III. |
| 资助项目 | Gansu Provincial Science and Tech-nology Plan[21ZD3GB001] ; LingChuang Research Project of China National Nuclear Corporation |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001335305600001 |
| 出版者 | ELSEVIER |
| 资助机构 | Gansu Provincial Science and Tech-nology Plan ; LingChuang Research Project of China National Nuclear Corporation |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Chen, Shenghu; Rong, Lijian |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lv, Xinliang,Chen, Shenghu,Rong, Lijian. Evolution of precipitate and its effect on the degradation of impact toughness in a carbon and nitrogen-controlled 316 stainless steel during thermal aging at 650 °C[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,33:3728-3742. |
| APA | Lv, Xinliang,Chen, Shenghu,&Rong, Lijian.(2024).Evolution of precipitate and its effect on the degradation of impact toughness in a carbon and nitrogen-controlled 316 stainless steel during thermal aging at 650 °C.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,33,3728-3742. |
| MLA | Lv, Xinliang,et al."Evolution of precipitate and its effect on the degradation of impact toughness in a carbon and nitrogen-controlled 316 stainless steel during thermal aging at 650 °C".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33(2024):3728-3742. |
入库方式： OAI收割
来源：金属研究所
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