BLIP Irradiation and PIE plan: MSU-FRIB Aida Amroussia, PhD Candidate 1 Pr. Carl J Boehlert 1 Dr. Frederique Pellemoine 2 Pr. Wolfgang Mittig 2 1 Michigan State University 2 Facility For Rare Isotope Beams 1

In Ti-6Al-4V thermomechanical processing influences the grain size and phase compositions (ratio of α phase to β phase). Influence of irradiation on tensile properties and ductility of neutron irradiated Ti-6Al-4V processed through forgings and stampings Rodchenkov, B.S., M.V. Evseev, Yu.S. Strebkov, L.P. Sinelnikov, and V.V. Shushlebin, ‘Properties of Unirradiated and Irradiated Ti–6Al–4V Alloy for ITER Flexible Connectors’, Journal of Nuclear Materials, 417 (2011), 928–31 Objective of the study Our objective is to investigate the effect of the microstructure on the irradiation damage in Ti-6Al-4V. 4 different thermo-processing methods:  Powder metallurgy (PM) rolled  Direct Metal Laser Sintering (DMLS): As received ( DMLS- As received ) Heat treatment 1 ( DMLS- HT1): T=850 C Heat treatment 2( DMLS- HT2) : T=1020 C 2

Summary of tensile samples 1PM Rolled 2 DMLS-As received 3DMLS-HT 1 4DMLS-HT 2 5PM Rolled 6 DMLS-As received 7DMLS-HT 1 8DMLS-HT 2 May be eliminated Depending on the capsule dimensions we can decrease the number of samples. 3

Objective: High dose. Based on the preliminary MARS estimation by FermiLab ~ 3.5 dpa. The desired temperature is the lowest possible. We need beam parameters to estimate the temperature. Can we also have the boundary conditions for the system (water cooling..)? We are considering the possibility to run w/o capsule. All samples will be mechanically polished to achieve good surface for microscopy. What is tolerance for thickness uniformity across samples? Irradiation at BLIP 4

PIE We have applied for funding through ATR NSUF Max 50k $ (~ 4 samples) The PIE lab would be PNNL If ATR NSUF proposal is rejected, we are looking for other options. Possible funding through Radiate ? AnalysisTestComments Mechanical property Tensile testThe samples would be polished in advance Micro-structureSEMThe samples would be polished in advance Nano-structureTEMCan we prepare the TEM samples in advance? If yes were there previous experiments with TEM sample in the capsule? Thermal propertiesConductivityNot a priority 5

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