Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 49: Pattern Formation (joint session DY/BP)

DY 49.3: Vortrag

Donnerstag, 10. März 2016, 10:15–10:30, H46

Towards a more thorough understanding of dislocation contributions in shape-memory alloys — •Heike Emmerich — Universität Bayreuth, Lehrstuhl Material- und Prozesssimulation, Universitätsstraße 30, D-95447 Bayreuth

The scientific interest in solid state cooling technologies has been renewed and increased since the discovery of of new materials with giant ferrocaloric effects - and with it the interest in understanding the hysteresis effects associated with the rise of crystal defect evolution as a result of plastic deformations at diverse time scales more thoroughly. In this contribution we show how phase-field modeling including elastic and plastic contributions tight to incoherent martensitic phase transitions can contribute to shade light into this scenario. Additionally we elucidate from a fundamental point of view how the associated enthalpic contributions can be reconciled and validated with atomistic concepts.