Strain rate effects on the mechanical behavior of porous titanium with different pore sizes

High strain-rate (up to 6600 s−1) and quasi-static compression tests are conducted on a powder-sintered porous titanium with different pore sizes (mean: 30μm and 120μm). In situ X-ray imaging is implemented to characterize the pores-scale deformation dynamics. The yield strength as a function of strain rate exhibits two stages of rate sensitivity, and the transition occurs at ∼1600 s−1. X-ray images show that pore compaction and strain...