Tailoring the Bain strain of martensitic transformations in Ti-Nb alloys by controlling the Nb content

Autor(en)

Matthias Bönisch, Thomas Waitz, Mariana Calin, Werner Skrotzki, Juergen Eckert

Abstrakt

The lattice (Bain) strain and corresponding volume change of a martensitic phase transformation are key parameters that determine the formation of a self-accommodated martensitic microstructure and related functional properties. Based on experimentally determined lattice parameters of the cubic austenite beta and of the hexagonal and orthorhombic martensites alpha' and alpha '', the lattice strain and the volume change related to the beta -> alpha'/alpha '' martensitic transformations in Ti-Nb alloys are analyzed in dependence of composition. The lattice strains of the transformation beta -> alpha '' increase with decreasing Nb content but those of beta -> alpha' are not affected by the amount of Nb. Depending on the composition, both a volume dilatation and contraction is encountered. It is proposed that the volume change plays a decisive role in determining the lattice structure of the martensitic phase that evolves when the transformation is thermally induced.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Technische Universität Dresden, Österreichische Akademie der Wissenschaften (ÖAW), Montanuniversität Leoben

Journal

International Journal of Plasticity

Band

85

Seiten

190-202

Anzahl der Seiten

13

ISSN

0749-6419

DOI

https://doi.org/10.1016/j.ijplas.2016.07.010

Publikationsdatum

10-2016

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Mechanics of Materials, Mechanical Engineering, Allgemeine Materialwissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/67958e89-1050-4e96-a78e-a4e49681604b