NSUF 16-CINR-10537: Enhancing irradiation tolerance of steels via nanostructuring by innovative manufacturing techniques
Equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) are two advanced and low-cost manufacturing techniques that produce alloys with ultrafine or nanocrystalline grain sizes. Alloys produced by ECAP or HPT possess dramatically higher strength than their conventionally processed counterparts, owing to significant grain boundary (GB) strengthening, and have significantly enhanced irradiation tolerance due to significant volume fraction of GBs that serve as sinks or recombination centers for radiation-induced defects. Austenitic steels are very important core internal materials for light water reactors, and ferritic/martensitic (F/M) steels are leading fuel cladding and structural materials for advanced fast reactors. Our proposed project will establish the performance of ultrafine-grained and nanocrystalline variants of reactor structural and cladding steels produced by ECAP or HPT, under neutron irradiation at relevant reactor operating temperatures, which has not previously been accomplished. The objectives of our proposed research are to establish/enhance our fundamental understanding of irradiation effects in ultrafine-grained or nanocrystalline steels produced by ECAP or HPT, and to assess the potential applications of ECAP and HPT in fabricating materials for applications in current and advanced reactors. Improving the performance of currently used austenitic and F/M steels through microstructural engineering via advanced manufacturing techniques provides high potential to improve radiation tolerance at relatively low cost compared to development of new alloys. The proposed research is highly relevant to DOE-NE’s Light Water Reactor Sustainability program and Advanced Fast Rector program.
Información Adicional
| Campo | Valor |
|---|---|
| Awarded Institution | Idaho State University |
| CINR Number | 16-10537 |
| Embargo End Date | 2027-12-17 |
| Facility Tech Lead | Alina Montrose |
| Irradiation Facilities | Advanced Test Reactor |
| NSUF Call | FY 2016 CINR |
| PI | Haiming Wen |
| PIE Facilities | Hot Fuel Examination Facility |
| Project Member | Dr. Isabella van Rooyen, Senior Technical Advisor Advanced Material Systems - Pacific Northwest National Laboratory (https://orcid.org/0000-0001-8524-938X) |
| Project Member | Professor Haiming Wen, Associate Professor - Missouri University of Science and Technology (https://orcid.org/0000-0003-2918-3966) |
| Project Notes | Awarded on 10/25/2016 |
| Project Type | CINR |
| Publication | Annealing behavior in a high-pressure torsion-processed Fe–9Cr steel Jiaqi Duan, Haiming Wen Journal of Materials Science 55 2020-09-15 https://link.springer.com/article/10.1007/s10853-020-04560-3 |
| Publication | Discontinuous grain growth in an equal-channel angular pressing processed Fe-9Cr alloy with a heterogeneous microstructure Jiaqi Duan, Haiming Wen Materials Characterization 159 2020-01-14 https://www.sciencedirect.com/science/article/abs/pii/S1044580319320303 |
| Publication | Effects of the Tempering and High-Pressure Torsion Temperatures on Microstructure of Ferritic/Martensitic Steel Grade 91 Andrew Hoffman, Haiming Wen Materials 11 2018-12-11 https://pubmed.ncbi.nlm.nih.gov/29671761/ |
| Publication | Evolution of microstructure and texture during annealing in a high-pressure torsion processed Fe-9Cr alloy Haiming Wen, Jiaqi Duan Materialia 6 2019-05-14 https://www.sciencedirect.com/science/article/abs/pii/S2589152919301450 |
| Publication | High-pressure Torsion Assisted Segregation and Precipitation in a Fe-18Cr-8Ni Austenitic Stainless Steel Andrew Hoffman, Haiming Wen Materials Letters 243 2019-02-09 https://www.sciencedirect.com/science/article/abs/pii/S0167577X19302447 |
| Publication | Severe plastic deformation assisted carbide precipitation in Fe-21Cr-5Al alloy Maalavan Arivu, Andrew Hoffman, Jiaqi Duan, Haiming Wen Materials Letters 253 2019-06-04 https://www.sciencedirect.com/science/article/abs/pii/S0167577X19308560 |
| Publication | Novel effects of grain size and ion implantation on grain boundary segregation in ion irradiated austenitic steel Haiming Wen Acta Materialia 246 2023-01-23 https://www.sciencedirect.com/science/article/abs/pii/S1359645423000460 |
| RTE Number | 3038 |