Emily Brady¹, Eric Taleff¹; ¹University of Texas at Austin

Static and dynamic grain growth are investigated at 1200 to 1500°C in Type 1 (ASTM B393-18) niobium sheet material. Static grain growth occurs during annealing without concurrent plastic straining, while dynamic growth occurs during plastic straining at elevated temperature. Uniaxial tension tests at 10^-4 s^-1 and faster were used to measure flow and dynamic grain growth behaviors. Grain size and shape were characterized after static annealing (static case) and after tensile testing (dynamic case). Microstructures produced by different temperatures and strain rates are reported with the associated flow behaviors. Grain growth characteristics are contrasted between the static and dynamic cases.