Influence of Grain Boundary Structural Evolution on Pressure Solution Creep Rates

Influence of Grain Boundary Character on Creep Void Formation in Alloy 617

Mechanical models of the effect of grain boundary sliding on creep and creep rupture

Coble-creep response and variability of grain-boundary properties

A microstructural model of steady-state creep that couples grain-boundary transport, micromechanics, and grain sliding is employed to investigate the grain-boundary diffusional creep response of an idealized microstructure with variable boundary diffusivities. Both numerical and analytical methods were used to determine the stress state and, in some cases, the strain rate associated with an app...

Denuded Zones, Diffusional Creep, and Grain Boundary Sliding

The appearance of denuded zones following low stress creep in particle-containing crystalline materials is both a microstructural prediction and observation often cited as irrefutable evidence for the Nabarro– Herring (N–H) mechanism of diffusional creep. The denuded zones are predicted to be at grain boundaries that are orthogonal to the direction of the applied stress. Furthermore, their dime...

Mesoscale Simulation of Grain Boundary Diffusion Creep in the Presence of Grain Growth

Grain-boundary (GB) diffusion creep (Coble creep) is the dominant deformation mechanism for the fine-grained materials under low stress and at elevated temperature [1]. From the classical Coble creep formula [1], the strain rate is proportional to the external stress, and inversely proportional to the cube of the grain size: 3 ~ − d σ ε& . During creep deformation the grains become elongated in...