Absence of dynamic strain aging induced by precipitation in 316 austenitic stainless steel during thermal aging at 750 °C
文献类型：期刊论文
| 作者 | Lv, Xinliang1,2; Chen, Shenghu1; Rong, Lijian1 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2024 |
| 卷号 | 207页码:10 |
| 关键词 | Austenitic stainless steel Dynamic strain aging Accelerated aging treatment Precipitation Microstructural evolution |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2023.113580 |
| 通讯作者 | Chen, Shenghu(chensh@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn) |
| 英文摘要 | Dynamic strain aging (DSA) has long been seen in the solution-treated austenitic stainless steels, but DSA effect is affected after long-term exposure to high temperature in the fourth-generation nuclear reactors. This study investigated the effect of precipitates on the DSA effect of 316 austenitic stainless steel after accelerated aging at 750 degrees C for 10, 100 and 1000 h, which is used to simulate the long-term microstructural evolution at service temperature. A gradual reduction in the DSA effect is found with an increase in the grain boundary precipitates after aging for 10 and 100 h. The frequency of the interactions between dislocations and grain boundaries de-creases because moving dislocations are blocked by the precipitates formed at the grain boundaries. Meanwhile, the grain boundary precipitates occupy part of the grain boundaries, reducing the probability of dislocation emission from grain boundary. As the aging time prolongs to 1000 h, the newly-formed intragranular sigma phase acts as an obstacle to the dislocation movement, resulting in an increase in waiting time (tw-AG1000). Also, Cr atoms can be drained from mobile dislocation into sigma phase, leading to an increase in the aging time (ta-AG1000) required for pinning the arrested dislocations. As a result, the critical strain for the occurrence of DSA signifi-cantly increases, leading to the absence of DSA phenomenon. |
| 资助项目 | National Natural Science Foundation of China[51871218] ; Youth Innovation Promotion Association, CAS[2018227] ; LingChuang Research Project of China National Nuclear Corporation ; CNNC Science Fund for Talented Young Scholars |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001141336500001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; LingChuang Research Project of China National Nuclear Corporation ; CNNC Science Fund for Talented Young Scholars |
| 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, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, 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. Absence of dynamic strain aging induced by precipitation in 316 austenitic stainless steel during thermal aging at 750 °C[J]. MATERIALS CHARACTERIZATION,2024,207:10. |
| APA | Lv, Xinliang,Chen, Shenghu,&Rong, Lijian.(2024).Absence of dynamic strain aging induced by precipitation in 316 austenitic stainless steel during thermal aging at 750 °C.MATERIALS CHARACTERIZATION,207,10. |
| MLA | Lv, Xinliang,et al."Absence of dynamic strain aging induced by precipitation in 316 austenitic stainless steel during thermal aging at 750 °C".MATERIALS CHARACTERIZATION 207(2024):10. |
入库方式： OAI收割
来源：金属研究所
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