Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124Nuclear Science User Facilities 84 Accomplishments Samples for characterization by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were prepared via focused ion beam (FIB) at CAES. A total of nine TEM samples were successfully prepared and analyzed in detail.The samples captured sections of the interaction regions in a U‑10Mo vs. AA6061 diffusion couple annealed at 600°C for 24 hours that repre- sented the different microstructural features observed in the interac- tion region between the U‑10Mo and the AA6061. SEM analysis was carried out in the FIB using its SEM capabilities.TEM analysis was carried by high-angle annular dark-field (HAADF) imaging, energy disper- sive spectroscopy (EDS), selected area electron diffraction (SAED) on individual grains, and by precession diffraction analysis using the ASTAR system installed in the TEM. At of the end of FY 2015, analysis of the data was still in progress. This work was facilitated by the CAES staff: Jatuporn Burns,Yaqiao Wu, Joanna Taylor, and Kristi Moser-McIntire. Figure 1. TEM characterization via the ASTAR system in a selected region of a TEM sample from the interaction region of a U‑10Mo versus AA6061 diffusion couple annealed at 600°C for 24 hours. The micrographs show (a) the TEM sample, (b) a phase map identifying the UAl3 , UAl4 , U6 Mo4 Al43 , and UMo2 Al20 phases, (c) and (d) a reliability map and a virtual Brightfield micrographs detailing the microstructure of the selected region.