Publication detail

Complex investigation of deformation twinning in γ-TiAl by TEM and neutron diffraction

BERAN, P. HECZKO, M. KRUML, T. PANZNER, T. VAN PETEGEM, S.

Original Title

Complex investigation of deformation twinning in γ-TiAl by TEM and neutron diffraction

Type

journal article in Web of Science

Language

English

Original Abstract

A near-γ TiAl based alloy with 2at% of Nb was investigated by means of collaborative research based on transmission electron microscopy and in-situ neutron diffraction techniques with the aim to study mechanical twinning and its role within the mechanisms governing fatigue response and material properties. In-situ neutron diffraction measurements were performed during low cycle fatigue straining at room temperature. Induced lattice strain related to the formation of deformation twins was detected and used to follow changes in the macroscopic material response caused by the twinning process during cycling. A microscopic insight was realised by using several transmission electron microscopy techniques to reveal in detail an internal deformation microstructure of the material at the beginning as well as at the end of the fatigue life.The study was focused on the first loading cycles where the material shows intense cyclic hardening. The effect of mechanical twinning on the material behaviour at several stages of the fatigue life is discussed for two different total strain amplitudes of 0.2% and 0.4%.

Keywords

Dislocations, Twinning, Polycrystalline Material, Neutron Diffraction, Electron Microscopy

Authors

BERAN, P.; HECZKO, M.; KRUML, T.; PANZNER, T.; VAN PETEGEM, S.

Released

1. 10. 2016

Publisher

Elsevier

Location

Amsterdam

ISBN

0022-5096

Periodical

Journal of the Mechanics and Physics of Solids

Year of study

95

Number

1

State

United States of America

Pages from

647

Pages to

662

Pages count

16

URL

http://www.sciencedirect.com/science/article/pii/S0022509615302659

BibTex

@article{BUT127728,
  author="Přemysl {Beran} and Milan {Heczko} and Tomáš {Kruml} and Tobias {Panzner} and Steven {Van Petegem}",
  title="Complex investigation of deformation twinning in γ-TiAl by TEM and neutron diffraction",
  journal="Journal of the Mechanics and Physics of Solids",
  year="2016",
  volume="95",
  number="1",
  pages="647--662",
  doi="10.1016/j.jmps.2016.05.004",
  issn="0022-5096",
  url="http://www.sciencedirect.com/science/article/pii/S0022509615302659"
}