NSUF 17-1073: Ion irradiation response of nanostructured alloys: In-situ TEM observations vs. ex-situ characterization
In-situ transmission electron microscopy (TEM) combined with ion irradiation is a powerful tool to characterize the microstructural evolution under irradiation because the microstructure evolution can be followed as the damage proceeds. The objective of the work is to investigate the microstructure evolution under ion irradiation in advanced nanostructured alloys (14YWT, 18Cr-ODS and NC-T91) using both in-situ TEM observation and ex-situ microchemistry analysis. The focus of the experiments will be to look at the dislocation loops induced by irradiation and characterize their burgers vectors and density as a function of dose. Such in-situ experiments are invaluable to obtain kinetics of the defect formation in these alloys and show how the irradiation induced damage spatially correlates with the pre-existing microstructure. The chemical stability of the matrix and the dispersion will be a major point of interest. It is also a necessary method in order to understand the microstructures observed in ion (and neutron) irradiated bulk samples examined ex-situ for, in these cases, only snapshots are available at limited doses. As far as bigger impact, these experiments are part of a larger effort involving several universities with the goal to demonstrate the capability of predicting the evolution of microstructure of F/M alloys in-reactor and at high doses, using ion irradiation as a surrogate for reactor irradiations. When possible, the observations done in situ will be compared with the observations done on the same alloys irradiated in BOR 60.
Дополнительная информация
| Поле | Величина |
|---|---|
| Awarded Institution | North Carolina State University |
| Embargo End Date | 2019-06-20 |
| Facility Tech Lead | Wei-Ying Chen |
| NSUF Call | FY 2017 RTE 3rd Call |
| PI | Djamel Kaoumi |
| Project Member | Professor Djamel Kaoumi, Professor - North Carolina State University (https://orcid.org/0000-0001-7055-0444) |
| Project Member | Dr. Ce Zheng, Postdoctoral researcher - North Carolina State University (https://orcid.org/0000-0001-8509-9385) |
| Project Notes | Awarded on 09/20/2017 |
| Project Type | RTE |
| Publication | Use of in-situ TEM to characterize the deformation-induced Martensitic transformation in 304 stainless steel at cryogenic temperature Djamel Kaoumi, Junliang Liu Materials Characterization 136 2018-02-01 https://www.sciencedirect.com/science/article/pii/S1044580317317801 |
| Publication | In Situ Dual-Beam Ion Irradiation with Transmission Electrom Microscopy Meimei Li, Jing Hu ANS Annual Meeting 2018 2018-06-15 - 2018-06-18 |
| Publication | Microstructure characterization of ion-irradiated Ferritic/Martensitic HT9 steel Djamel Kaoumi, Ce Zheng Microscopy & Microanalysis 23 2017-07-01 https://www.researchgate.net/publication/319012310_Microstructure_Characterization_of_Ion-irradiated_FerriticMartensitic_HT9_Steel |
| Publication | Microstructural and nanomechanical characterization of in-situ He implanted and irradiated fcc materials David Frazer, Peter Hosemann, Djamel Kaoumi, Ce Zheng Microscopy & Microanalysis 23 (Suppl 1) 2017-11-01 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/DCD899DA0123ACEFF7DB351E21C0DEEE/S1431927617004445a.pdf/microstructural_and_nanomechanical_characterization_of_insitu_he_implanted_and_irradiated_fcc_materials.pdf |
| Publication | Correlation of in-situ transmission electron microscopy and microchemistry analysis of radiation-induced precipitation and segregation in ion-irradiated advanced ferritic/martensitic steels Ce Zheng, Stuart Maloy, Djamel Kaoumi Scripta Materialia 162 2019-03-01 https://www.sciencedirect.com/science/article/pii/S1359646218307528 |
| RTE Number | 1073 |