Intergranular Fracture under Creep-Fatigue Interaction
Source abstract
Abstract
For metals under cyclic loading at elevated temperatures the interaction of fatigue failure with intergranular creep failure is studied by a micromechanical model. Focus here is on a range of relatively slow cycling, where creep damage dominates, or rapid cycling after that some creep damage has developed. A numerical unit cell model analysis for a small region around a grain boundary cavity is used to study the acceleration of the damage process due to the development of fatigue damage in the ligament between neighbouring grain boundary cavities. The prediction of fatigue damage is incorporated in a cyclic plasticity model, and dislocation creep is represented as power-law creep. Also the effect of grain boundary diffusion on the cavity growth rate is accounted for in some cases.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High Temperature Alloys and Creep · Fatigue and fracture mechanics · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Solid Mechanics, Technical University of Denmark, DK-2800 Lyngby, Denmark
References (39)
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