Lattice continuum and diffusional creep

What is it about?

Many applications in aerospace and energy generation require structural materials which are stable at high temperatures, where the main failure mechanism is creep: slow fluid-like flow at constant load ending in cavitation and rupture. In this paper, a predictive mathematical model for creep deformation is formulated. Starting from the elementary creep mechanisms: diffusion of vacancies in a crystalline lattice and growth/loss of lattice at the grain boundaries; a consistent macroscopic mathematical formulation is developed. The goal is to enable simulations, predictions, and ultimately, design of creep resistant materials.

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