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Atomic-scale study of precipitates (NbC and Cu-rich phase) at the twin boundary in the long time ageing austenitic stainless steel |
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| Authors: | Xingyuan San Dan Zhang Xinshuang Guo Xingkun Ning |
| Affiliation: | 1. The College of Physics Science and Technology, Hebei University, Baoding, People’s Republic of China xysan@hbu.edu.cn;3. The College of Physics Science and Technology, Hebei University, Baoding, People’s Republic of China;4. Engineering Technology Research Center for Environmental Protection Materials and Equipment of Jiangxi Province, Pingxiang University, Pingxiang, People’s Republic of China |
| Abstract: | ABSTRACT Microstructures of Cu-rich phases and NbC precipitated phases have been studied in a long time ageing austenitic stainless steel by high resolution scanning transmission electron microscopy. The interaction difference between the twins and the second phases found to be dependent on the nature of the precipitates. The Cu-rich phases were identified to be twinned at the twin boundary. Nevertheless, the NbC precipitates not only twinned at the twin boundary but also induced the twin boundary bypass them. A particle size dependence of the generation of misfit dislocations also was detected at interface between precipitates and the austenitic matrix. |
| Keywords: | Stainless steel precipitation twin boundary scanning transmission electron microscopy |