Publication result detail

On the relationship between {1 1 2¯ 2} and {1 1 2¯ 6} conjugate twins and double extension twins in rolled pure Mg

OSTAPOVETS, A.; BURŠÍK, J.; KRAHULA, K.; KRÁL, L.

Original Title

On the relationship between {1 1 2¯ 2} and {1 1 2¯ 6} conjugate twins and double extension twins in rolled pure Mg

English Title

On the relationship between {1 1 2¯ 2} and {1 1 2¯ 6} conjugate twins and double extension twins in rolled pure Mg

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

The paper presents a new type of twin-like objects observed in rolled pure magnesium. They have and habit planes and their misorientations to the matrix are close to 56° and 63° about axis, respectively. The ad hoc performed theoretical analysis and atomic simulations allow to interpret the objects as double twins formed by the simultaneous action of two twinning shears with completely re-twinned volume of primary twin. The observed inclinations from the ideal misorientations for such double twins can be explained by the compliance of the strain invariant condition in the twin boundary. It seems plausible that, once the double twin is formed, its twin boundaries are hard to move by glide of twinning disconnections. If so, these twins represent obstacles for the motion of crystal dislocations increasing the hardness of the metal.

English abstract

The paper presents a new type of twin-like objects observed in rolled pure magnesium. They have and habit planes and their misorientations to the matrix are close to 56° and 63° about axis, respectively. The ad hoc performed theoretical analysis and atomic simulations allow to interpret the objects as double twins formed by the simultaneous action of two twinning shears with completely re-twinned volume of primary twin. The observed inclinations from the ideal misorientations for such double twins can be explained by the compliance of the strain invariant condition in the twin boundary. It seems plausible that, once the double twin is formed, its twin boundaries are hard to move by glide of twinning disconnections. If so, these twins represent obstacles for the motion of crystal dislocations increasing the hardness of the metal.

Keywords

Magnesium, twinning, grain boundaries, plastic deformation, habit plane

Key words in English

Magnesium, twinning, grain boundaries, plastic deformation, habit plane

Authors

OSTAPOVETS, A.; BURŠÍK, J.; KRAHULA, K.; KRÁL, L.

RIV year

2018

Released

28.02.2017

ISBN

1478-6443

Periodical

PHILOSOPHICAL MAGAZINE

Volume

97

Number

14

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1188

Pages to

1101

Pages count

14

BibTex

@article{BUT134742,
  author="Andriy {Ostapovets} and Jiří {Buršík} and Karel {Krahula} and Lubomír {Král}",
  title="On the relationship between {1 1 2¯ 2} and {1 1 2¯ 6} conjugate twins and double extension twins in rolled pure Mg",
  journal="PHILOSOPHICAL MAGAZINE",
  year="2017",
  volume="97",
  number="14",
  pages="1188--1101",
  issn="1478-6435"
}