6. Grain Boundary Sliding and Superplasticity p diffusion across grain boundaries allows grains to realign or reassociate themselves by switching neighbors grain shapes are retained very short diffusion path lengths very fast strain rates, 4-5 times faster than Nabarro-Herring Creep assisted by very fine grains and higher temps Th>0.5) these characteristics insure short diffusion paths and rapid diffusion rates 13-313-3 6. Grain Boundary Sliding and Superplasticity diffusion across grain boundaries allows grains to realign or reassociate themselves by switching neighbors • grain shapes are retained • very short diffusion path lengths • very fast strain rates, 4-5 times faster than Nabarro-Herring Creep • assisted by very fine grains and higher temps (Th > 0.5) - these characteristics insure short diffusion paths and rapid diffusion rates