A blade body of a turbine blade, which defines an interior cavity fluidly communicative with coolant, is provided. The blade body includes an interior surface and one or more pins extending from the interior surface. The interior surface and the one or more pins are disposable to thermally interact with the coolant. At least one of the one or more pins includes a first section and a second section interposed between the first section and the interior surface. The first section has a larger cross-sectional area than the second section.