Modulated Martensites in Ferromagnetic Shape Memory Alloys: From Experimental Observations to Mathematical Modelling

0439994 - ÚT 2016 DE eng A - Abstrakt
Benešová, B. - Frost, Miroslav - Kampschulte, M. - Melcher, C. - Seiner, Hanuš
Modulated Martensites in Ferromagnetic Shape Memory Alloys: From Experimental Observations to Mathematical Modelling.
14th GAMM-Seminar on Microstructures 2015. Regensburg: Department of Mathematics, University of Regensburg, 2015. s. 22-22.
[GAMM-Seminar on Microstructures /14./. 16.01.2015-17.01.2015, Regensburg]
Grant CEP: GA AV ČR(CZ) DAAD/14/11; GA ČR GA14-15264S; GA ČR(CZ) GP14-28306P
Institucionální podpora: RVO:61388998
Klíčová slova: ferromagnetic shape memory alloys * modulated martensite * modelling
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
http://www.mathematik.uni-regensburg.de/Dolzmann/GAMM15/GAMMSeminar2015_Abstracts.pdf

We present a possible approach for modelling of mechanisms of the formation of modulated structures within Ni-Mn-Ga martensite as well as of transitions between them at the level of continuum mechanics, combining the so-called adaptive concept of martensites with an additional selection mechanism for the periodicity of the modulation. Although being built on very rough assumptions, the model seems to feature many aspects of the experimentally observed behaviors of the modulated phases, in particular the irregularities in the atomic positions and the hysteresis of the transition temperatures.
Trvalý link: http://hdl.handle.net/11104/0247399