Activities per year
Abstract
Polycrystalline materials may suffer internal damage due to diffusion of chemically aggressive species during service. Diffusion rates are greatly enhanced on grain boundaries (GB). This can be modelled with discrete networks, where the GB structure is represented by links with local diffusivities. We present a site-bond model for concentration-driven diffusion that can be used to study the accumulation of chemical species at GB, leading to deterioration and eventual cracking. We employ realistic distributions of GB energies and corresponding diffusivities from published works. We show how the model can be used to predict macroscopic diffusivities with little experimentation. We demonstrate how the grain boundary structure controls the extent of internal damage resulting from the diffusion of chemical species.
Original language | English |
---|---|
Title of host publication | MSMF7 |
Editors | Pavel Sandera, Jaroslav Pokluda |
Pages | 1-4 |
Number of pages | 4 |
Publication status | Published - 1 Jul 2013 |
Event | 7th Int Conf on Materials Structure & Micromechanics of Fracture - Brno, Czech Republic. Duration: 1 Jul 2013 → 3 Jul 2013 |
Conference
Conference | 7th Int Conf on Materials Structure & Micromechanics of Fracture |
---|---|
City | Brno, Czech Republic. |
Period | 1/07/13 → 3/07/13 |
Keywords
- polycrystalline materials
- grain boundary network
- local diffusivity
- discrete analysis
- boundary cracking
Fingerprint
Dive into the research topics of 'Discrete model for diffusion-induced grain boundary deterioration'. Together they form a unique fingerprint.Activities
- 1 Oral presentation
-
Discrete model for diffusion-induced grain boundary deterioration
Jivkov, A. (Speaker)
2 Jul 2013Activity: Talk or presentation › Oral presentation › Research