A new approach predicting the evolution of laminated nanostructures - Martensite in NiTi as an example

Autor(en)

Manuel Petersmann, Thomas Antretter, T. Waitz, F. D. Fischer

Abstrakt

A model for laminated nanostructures, combining classical energy minimization with full-field finite element calculations in a computationally fully automated manner, is set up and used to quantitatively analyse the interaction of grains via self-accommodation of their transformation strains. The well known Koistinenwell established B2-B19' martensitic phase transformation in nanocrystalline NiTi is treated as an exemplary case to demonstrate our new framework. A systematic search for an optimal energy minimizing transformation path is employed within a full-field model, including crystallographic transformation strains and fully anisotropic elastic constants, by using the Python scripting language. The microstructure is updated based on previous calculation results. The underlying incremental free energy minimization criterion naturally reproduces the transformation kinetics. The sequence of grains subjected to transformation as well as the selection of martensitic variants within the grains are obtained yielding the evolution of the total interface energy as well as the strain energy, dominating our approach.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Montanuniversität Leoben

Journal

Modelling and Simulation in Materials Science and Engineering

Band

25

Anzahl der Seiten

17

ISSN

0965-0393

DOI

https://doi.org/10.1088/1361-651X/aa5ab4

Publikationsdatum

02-2017

Peer-reviewed

Ja

ÖFOS 2012

103035 Theoretische Mechanik, 103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Mechanics of Materials, Allgemeine Materialwissenschaften, Computer Science Applications, Modelling and Simulation

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/94227001-176f-43d8-be3c-933b2f53ca39