A mesoscale approach to the creep phenomenon

DIPC Seminars

Ricardo Fernández, Centro Nacional de Investigaciones Metalurgicas, CENIM, Madrid
Donostia International Physics Center
Add to calendar
Subscribe to Newsletter
A mesoscale approach to the creep phenomenon The empirical power law equation that governs the creep behavior of metals has allowed to understand some of the main characteristics of this phenomenon. In some cases, the description of the creep is based on some (apparently simple) equations developed at the microscopic scale, as the well accepted Orowan and/or Taylor equations. However, many other points regarding this phenomenon still remain unexplained for decades, which limits the predictive capacity of current models. In a collaboration between CENIM and BAM, a new vision of the creep phenomenon at the mesoscale is being developed. This description is based in three concepts: Creep can be described as a solid state transformation, the mesoscale characteristics of the microstructure; /i.e./ its fractal nature controls the strain evolution, and the interactions among a huge number of dislocations must be considered for a fundamental and predictive physical description of the creep phenomenon. In the present talk we introduce the main ideas of this very exciting path that we are walking and expect to finish in the next years. Host: Javier Aizpurua