FIELD-ION MICROSCOPY OBSERVATIONS AND ATOMISTIC SIMULATIONS OF RIGID-BODY SHIFTS AT TILT GRAIN BOUNDARIES IN TUNGSTEN

Author:

AZHAZHA V. M.1,NEKLYUDOV I. M.1,KSENOFONTOV V. A.1,MAZILOVA T. I.1,MIKHAILOVSKIJ I. M.1,SADANOV E. V.1,MAZILOV A. A.1

Affiliation:

1. National Scientific Centre, Kharkov Institute of Physics and Technology, Academicheskaja 1, 61108 Kharkov, Ukraine

Abstract

Field-ion microscopy and molecular dynamics simulation were used for the characterization of the translation states at special grain boundaries in tungsten. It is revealed that rigid-body displacement had the component of displacement parallel to the [110] direction equal to 0 or 1 interplanar spacing. Full vectors of lateral shifts are described by broad statistical distribution. The mathematical simulation revealed two mirror-symmetry-breaking lateral translations along the [Formula: see text] direction of the Σ9 grain boundary corresponding to different atomic structures. It is shown that the partial disconnection with the [Formula: see text] Burgers vector can be considered as the elemental carriers of grain-boundary polymorphic transformation.

Publisher

World Scientific Pub Co Pte Lt

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

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