NSUF 18-1382: Heavy ion irradiation on SCC resistant austenitic stainless steel made by laser additive manufacturing
By optimizing the microchemistry and microstructure through laser powder bed fusion (L-PBF) process, a new additive-manufactured (AM) austenitic stainless steel (SS) has been recently developed to provide similar stress corrosion cracking (SCC) susceptibility as Alloy 690 in high temperature water. In order to further understand its swelling resistance, we would like to acquire funding support from NSUF to conduct heavy ion irradiation on three kinds of materials for a comparison study. These materials include wrought 316L SS, AM 316L SS, and this novel SCC resistant AM SS. 5 MeV Fe++ ions irradiation with ~100 dpa will be completed at the Michigan Ion Beam Laboratory (MIBL) at the University of Michigan using well controlled irradiation conditions. The irradiation will be conducted under three different temperatures (450 °C, 500 °C, 550 °C). The experiment will take ~ 2 weeks of instrument time and be completed in 4-6 months. This project will produce irradiated samples for further characterization.
It has been recently discovered that the non-equilibrium material state by L-PBF can significantly improve the SCC resistance, which was unheard of by any means. This proposed NSUF RTE project will provide important scientific insights on how the swelling resistance will be affected by the beneficial microchemistry and microstructure. Additive manufacturing technology is currently being extensively studied through a number of DOE sponsored projects. However, a number of studies suggested that AM’s intrinsic high manufacturing cost (compared to traditional manufacturing) limits the wide acceptance of AM in nuclear industry. Further improving the irradiation resistance of AM SS will not only accelerate the commercialization of AM technology in nuclear sector, but also open a new path for developing high performance alloys for nuclear applications.
Additional Info
| Field | Value |
|---|---|
| Abstract | By optimizing the microchemistry and microstructure through laser powder bed fusion (L-PBF) process, a new additive-manufactured (AM) austenitic stainless steel (SS) has been recently developed to provide similar stress corrosion cracking (SCC) susceptibility as Alloy 690 in high temperature water. In order to further understand its swelling resistance, we would like to acquire funding support from NSUF to conduct heavy ion irradiation on three kinds of materials for a comparison study. These materials include wrought 316L SS, AM 316L SS, and this novel SCC resistant AM SS. 5 MeV Fe++ ions irradiation with ~100 dpa will be completed at the Michigan Ion Beam Laboratory (MIBL) at the University of Michigan using well controlled irradiation conditions. The irradiation will be conducted under three different temperatures (450 °C, 500 °C, 550 °C). The experiment will take ~ 2 weeks of instrument time and be completed in 4-6 months. This project will produce irradiated samples for further characterization. It has been recently discovered that the non-equilibrium material state by L-PBF can significantly improve the SCC resistance, which was unheard of by any means. This proposed NSUF RTE project will provide important scientific insights on how the swelling resistance will be affected by the beneficial microchemistry and microstructure. Additive manufacturing technology is currently being extensively studied through a number of DOE sponsored projects. However, a number of studies suggested that AM’s intrinsic high manufacturing cost (compared to traditional manufacturing) limits the wide acceptance of AM in nuclear industry. Further improving the irradiation resistance of AM SS will not only accelerate the commercialization of AM technology in nuclear sector, but also open a new path for developing high performance alloys for nuclear applications. |
| Award Announced Date | 2018-05-17T10:53:24.317 |
| Awarded Institution | Center for Advanced Energy Studies |
| Facility | Microscopy and Characterization Suite |
| Facility Tech Lead | Kevin Field, Yaqiao Wu |
| Irradiation Facility | None |
| PI | Xiaoyuan Lou |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1382 |