The preparations are getting more concrete - the programme is ready!
The sessions of the Intermetallics Conference in Bad Staffelstein can be explored. You can look forward to plenary lectures by renowned speakers from Germany and abroad, scientifically highly interesting abstract presentations and a great poster exhibiton.
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School on “Introduction to dislocation structures in metals and intermetallics” – 02 October 2025
As an additional offer for students and young colleagues, there will be the opportunity to participate in a short school about the basics of dislocation structures in metals and intermetallics. The school, lead this year by Sharvan Kumar (Brown University / US) is especially intended for students and young postdocs, the number of participants is limited and will be filled on a first come – first serve basis. There is no additional charge for participation in the school, but registration beforehand is necessary.
Part I
Introduction - dislocation description and motion - elastic theory of straight dislocations - dislocation core
Start with a brief description of dislocations: edge, screw, mixed character; Burgers vector and line sense. Response to shear stress and motion (glide, cross slip and climb); jogs and kinks and their motion. Glide loops and prismatic loops. Dislocation density and plastic shear strain rate; [Stress fields of edge and screw dislocations; energy of dislocations; Force on a dislocation and between dislocations; interaction of parallel dislocations; edge dipole configuration]. The dislocation core, Peierls stress and Peierls energy. The origin of kinks on dislocations; Dislocation multiplication – Frank Read Source.
Part II
Basics of dislocations in FCC and BCC structures
Crystal structure, slip planes and slip directions; Partial dislocations and stacking faults in the FCC structure; Shockley partials and Frank partials; Stacking fault energy; Intrinsic and extrinsic stacking faults; cross-slip of dissociated dislocations. Dislocation reactions: The Lomer-Cotrell Lock. Dislocations in BCC metals; the non-planar screw dislocation core and consequences on flow behavior; The gamma surface.
Part III
Introduction to ordered structures and dislocation configurations in the L12 structure
Order-disorder transformation; Antiphase domains and antiphase boundaries. Basic types of ordered structures and planar defects; Deviation from stoichiometry and accommodation by point defects; dislocation dissociation schemes in the L12 structure. Core structures of screw dislocations in the L12 structure. Temperature dependence of strength in the L12 structure, and experimental observations in single and polycrystals and time-permitting, a brief discussion of a few models that have evolved to explain the positive temperature dependence of strength.