Effects of lattice misfit on plastic deformation behavior of single-crystalline micropillars of Ni-based superalloys

The deformation behaviors of rectangular-parallelepiped micropillars fabricated from [001]-oriented Ni-based superalloys with negative and positive lattice misfits, respectively, were investigated with respect to the specimen size. The yield stresses of the larger specimens (side length L > ∼2 μm) of both considered alloy types were found to be nearly independent of the size, while the smaller specimens (L < ∼2 μm) exhibited “smaller is...