b'The testing geometries developed in META are able to be tested in a hot cell environment, minimize strain gradients from testing tube components to clarify mechanical property measurements obtained from the test, and minimize the consumption of valuable irradiated material.the effect of the coating methods and machining methods on theFigure 3. ATT specimens were machined out of Zircaloy-4 tubing in the AR and mechanical properties. It was foundCr-coated conditions via electrical discharge machining (EDM) or end mill to that the cold spray and -100V biasdetermine the effect of machining method on mechanical properties. It was found that EDM machining significantly impacts the mechanical properties coated material exhibited increasedobtained from testing, so end milling is recommended for all future testingstrength properties and slightly reduced uniform and total elonga-tions in the axial direction from ATT tests at room temperature and 300C. However, no improvements were found in the hoop direction from RTT tests, but results at 300C showed that the differences between the coated materials and as-received material in the hoop direction were diminished. Furthermore, for all materials it was found that end milled specimens exhibited significantly reduced stress proper-ties, signifying that the mechanical properties obtained from the tubing specimens are highly sensitive to the machining process used to create the tensile geometry. As a result, it is recommended that endFigure 2. ATT and RTT mechanical tests were performed with as-received as mill machining be used in all futurewell as cold-spray, -100V HiPIMS, -150V HiPIMS, and -200V HiPIMS Cr-coated Zircaloy-4 to investigate the effect of the coating procedures on mechanical testing to reduce the machining- properties of the tubes. Marginal strength improvements were found in the axial related material differences. direction for the cold spray and -100V bias coating methods2023|AFC ACCOMPLISHMENTS 89'