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| Contribution of Irradiation-Induced Defects to the Irradiation Hardening of Fe-Mn-Ni-Si Quaternary Alloy Under Ion Irradiation |
| Received:May 21, 2021 Revised:July 20, 2021 |
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| DOI：10.7643/issn.1672-9242.2022.01.005 |
| KeyWord:ion irradiation irradiation hardening atom probe tomography clusters transmission electron microscope dislocation loops |
| Author | Institution |
| XUE Jing |
School of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing , China |
| HU Rong |
School of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing , China |
| XUE Fei |
Suzhou Nuclear Power Research Institute, Suzhou , China |
| SHA Gang |
School of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing , China |
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| Abstract: |
| The purpose of this paper is to understand the contribution of irradiation-induced defects to irradiation hardening under ion irradiation for 350 ℃. Nanoindentation test was carried out on the samples before and after irradiation, and the hardness increment was obtained to measure the irradiation hardening. The atom probe tomography was used to extract the microstructure information of clusters, such as number density, volume fraction and size of cluster. The transmission electron microscope was used to analysis the number density and the size of the irradiation-induced dislocation loops. The Dispersed Barrier Hardening Model was applied to estimate the hardness increment from clusters and dislocation loops. And then, it is compared with the hardness increment measured by nanoindenter. Based on the estimated result, the contribution of clusters to the hardness increment is greater than the contribution of dislocation loops. The sum of the contributions of clusters and dislocation loops to the hardness increment estimated by the model is slightly smaller than the measured hardness increment. As a conclusion, the sum of hardness increments estimated by the model based on the microstructure information can generally reflect the changes of irradiation hardening. However, due to the resolution of the characterization methods and other reasons, there are small discrepancies between the hardness increment estimated by the model and the actually measured hardness increment. |
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