Detail publikace

On mechanical twinning in tetragonal lattice

ZELENÝ, M. OSTAPOVETS, A. FRIDRICH, L. ŠESTÁK, P. HECZKO, M. KRUML, T.

Originální název

On mechanical twinning in tetragonal lattice

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The theory of mechanical twinning is revisited for the case of face-centred tetragonal lattices. The motivation is an imprecision in the determination of twinning shear vector magnitude, which occurs repeatedly in the literature. The magnitude of this vector describing the mutual shear of two adjacent crystallographic planes in the process of twin formation is a function of the tetragonality of the lattice c/a. Therefore, we introduce the c/a-dependent factor f which has to be applied to the magnitude of shearing vector < 112] instead of the commonly use factor 1/6, which is correct only for perfect cubic lattices. The theory is verified by ab initio calculations of the generalised planar fault energy curves for three tetragonal materials: the nonmodulated martensite phase of Ni2FeGa magnetic shape memory alloy,.-TiAl intermetallic and pure In. Moreover, the calculations show that the additional modification of shear vector is caused by structural optimisation due to short-range interactions in the vicinity of twin interface, especially for lattices with large deviation of c/a from 1. Such modification cannot be simply predicted from the lattice geometry.

Klíčová slova

Twinning; tetragonal lattice; phase transformations; intermetallic compounds

Autoři

ZELENÝ, M.; OSTAPOVETS, A.; FRIDRICH, L.; ŠESTÁK, P.; HECZKO, M.; KRUML, T.

Vydáno

27. 10. 2022

Nakladatel

TAYLOR & FRANCIS LTD

Místo

ABINGDON

ISSN

1478-6443

Periodikum

PHILOSOPHICAL MAGAZINE

Ročník

103

Číslo

2

Stát

Spojené království Velké Británie a Severního Irska

Strany od

119

Strany do

136

Strany počet

18

URL

https://www.tandfonline.com/action/showCitFormats?doi=10.1080%2F14786435.2022.2135037

BibTex

@article{BUT181519,
  author="Martin {Zelený} and Andriy {Ostapovets} and Lucius {Fridrich} and Petr {Šesták} and Martin {Heczko} and Tomáš {Kruml}",
  title="On mechanical twinning in tetragonal lattice",
  journal="PHILOSOPHICAL MAGAZINE",
  year="2022",
  volume="103",
  number="2",
  pages="119--136",
  doi="10.1080/14786435.2022.2135037",
  issn="1478-6443",
  url="https://www.tandfonline.com/action/showCitFormats?doi=10.1080%2F14786435.2022.2135037"
}