Martensitic microstructures: interfaces, size effects and multiscale modelling

Prof. Stanislaw Stupkiewicz

Timetable 2013-2014

Programme

Martensitic phase transformation is the basic mechanism responsible for the functional properties of shape memory alloys (SMA). The related phenomena, such as the shape memory effect and the pseudoelastic effect, are associated with formation and evolution of complex martensitic microstructures, i.e. with propagation of interfaces (phase transformation

fronts) within the material. The course will cover an introduction to martensitic microstructures, including the physical background, as well as selected advanced topics, mostly related to stress-induced transformations. The focus will be on interfaces, interfacial energy effects, and consequences of microstructure evolution as exhibited on the macro-scale. Specific topics include: compatibility conditions at interfaces, crystallographic theory of martensite, micro-macro transition for evolving laminates, elastic micro-strain energy at microstructured interfaces, interfacial energy and size effects in martensitic microstructures. SMA will be used as a primal application area, however, related mechanisms are observed in other advanced materials, such as high-strength TRIP and TWIP steels, magnesium alloys, intermetallics and others.