NSUF 24-5173: High-throughput ion irradiation approach for temperature-dependent swelling measurement in additively manufactured 316L alloy

The project will develop a high-throughput testing approach that allows for the measurement of void swelling at a given dose as a function of temperature using only a single ion irradiation. The key approach is to fabricate bar specimens of different heights, all additively printed as one assembly. With the large hot stage serving as a heat sink maintained at the base temperature, all bars will have identical temperatures at the bottom, but different temperatures at the top of the bar, depending on the bar height. With the ion beam irradiating the top surface of all bar samples, irradiation as a function of temperature, up to four temperatures, can be obtained through a single ion irradiation. Such enhancement by a factor of 4 is particularly important for studying the effect of displacement per atom (dpa) rate on swelling-temperature curves. Prolonged ion irradiation at different dpa rates requires such an innovative approach to increase not only testing efficiency but also data reliability. The project will use additively manufactured 316L as the benchmark testing alloy. The study selects additively manufactured 316L, not only because its swelling properties are scientifically intriguing compared to wrought materials, but also because the various heights needed for this project can be printed at once. This represents another interesting feature of 3D printing, making large matrix testing feasible. After ion irradiation, focused ion beam and transmission electron microscopy will be used to characterize swelling and microstructural changes as well as verifying the temperature shift.

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필드	값
Award Announced Date	2024-09-23T12:21:10.403
Awarded Institution	Texas A&M University
Facility Tech Lead	Lin Shao, Yaqiao Wu
Irradiation Facility	Accelerator Laboratory
PI	Rijul Chauhan
PI Email	[email protected]
Project Type	RTE
RTE Number	None