ECTS number : 3
The objective of the course is to describe the monotonic and cyclic plastic deformation of metals and alloys at different temperatures from the perspective of physical metallurgy. For each of the three parts developed below, analytical models of the mechanisms identified as relevant will be developed: - In the first part, the interactions between dislocations and obstacles to sliding (atoms in solution, immobile dislocations, coherent and incoherent particles, grain boundaries), will be discussed as the physical basis of the 'low' temperature yield strength. - Cyclic plasticity, the prerequisite for fatigue damage, will then be described on the basis of the same models, but we will show that the relevant scale in this case is at the level of microstructural cracks, their interactions and the kinetics of their development, in close connection with the material microstructure. - The third part will be devoted to the presentation of the physical mechanisms of creep (logarithmic, creep-diffusion, intergranular), made operational thanks to the increased atomic mobility at high T. We will highlight the link between the physical mechanisms and the macroscopic behaviour for different types of microstructures (single crystal, single phase polycrystalline, two phase and multiphase). Based on the concepts presented, we will discuss the problem of microstructure design for application under complex stresses (cyclic stresses, high temperature,...).
| On completion of the unit, the student will be capable of: | Classification level | Priority |
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| Percentage ratio of individual assessment | Percentage ratio of group assessment | ||||
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| Written exam: | 100 | % | Project submission: | % | |
| Individual oral exam: | % | Group presentation: | % | ||
| Individual presentation: | % | Group practical exercise: | % | ||
| Individual practical exercise: | % | Group report: | % | ||
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| Type of teaching activity | Content, sequencing and organisation |
|---|---|
| Lecture | 12 slots of 1.5 hours |
| Written exam | 1 slot of 2 hours |