Durability of Materials
This module is mainly interested in metallic materials and alloys. Durability of materials is a science and technology dealing with the evolution of "in service" properties, it is also known as environmentally sensitive damage and cracking, and tribology and tribo-corrosion for solids in contact.
A first lecture will give the fundamentals in electrochemical corrosion, then phenomena of localized corrosion will be explain and illustrated with different case studies of pitting, crevice corrosion, stress corrosion cracking and fatigue corrosion.
The use of materials in hydrogenating medium, whether during corrosion processes in reducing medium or in hydrogen gas atmosphere, is the cause of many damages in industry. Part of the lecture will be devoted to the phenomenon of hydrogen embrittlement and the physico-chemical mechanisms involved.
The phenomena of friction and wear will finally be treated in a last part.
The question of the choice of materials according to service conditions will be dealt with in each of these subsections.
Content:
1. Electrochemical Thermodynamics and Kinetics Relevance to Corrosion
2. Passivity and Localized Corrosion
3. Environmental-Assisted Cracking : Stress Corrosion Cracking, Fatigue-Corrosion
4. Hydrogen embrittlement
5. Tribology: Friction, Wear and Tribo-Corrosion
| On completion of the unit, the student will be capable of: | Classification level | Priority |
|---|---|---|
| Know the mechanisms of corrosion and localized corrosion (pitting, crevice corrosion) | 2. Understand | null |
| know the mechanisms and the coupling involved in environmentally assisted cracking phenomena (stress corrosion cracking, fatigue-corrosion, hydrogen embrittlement ) | 2. Understand | null |
| Know the mechanisms of friction and wear in tribologic systems, with or without corrosion interactions (surface properties, contact definition, friction, wear and dissipation) | 2. Understand | null |
| Thermodynamic equilibrium calculation (E-pH diagram) | 3. Apply | null |
| Determination of corrosion rates by the different electrochemical methods (Tafel, impedancemetry, loss weigth) | 3. Apply | null |
| Construction of analytical models of (i) crack initiation in fatigue-corrosion based on critical defect size, (ii) transition between pits and short cracks | 4. Analyse | null |
| Construction of analytical wear models | 4. Analyse | null |
| Percentage ratio of individual assessment | Percentage ratio of group assessment | ||||
|---|---|---|---|---|---|
| Written exam: | 60 | % | Project submission: | % | |
| Individual oral exam: | % | Group presentation: | % | ||
| Individual presentation: | % | Group practical exercise: | 20 | % | |
| Individual practical exercise: | 20 | % | Group report: | % | |
| Individual report: | % | ||||
| Other(s): % | |||||
| Type of teaching activity | Content, sequencing and organisation |
|---|---|
| Lectures, seminars and tutorials | 60 hours |
| Practical work | 10 hours |