Lennard-Jones Centre for Computational Materials Science

COMPUTER SIMULATION STUDY OF THE STRUCTURE OF TWIN BOUNDARIES AND TWINNING DISLOCATIONS IN BODY CENTRED CUBIC METALS.

Bristowe, PD and Crocker, AG (1976) COMPUTER SIMULATION STUDY OF THE STRUCTURE OF TWIN BOUNDARIES AND TWINNING DISLOCATIONS IN BODY CENTRED CUBIC METALS. Nucl Metall, 20. pp. 365-376.

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Abstract

The structures of left brace 112 right brace twin boundaries and of boundary steps or twinning dislocations in bcc crystals have been studied using computer simulation methods and interatomic potentials representing iron, molybdenum and tungsten. Two distinct boundary structures were found to be stable or metastable in the models used. These were the conventional twin interface defined by a reflection orientation relation and a twin in which the boundary consisted of a layer of cells which project on the left brace 110 right brace plane as interlocking isosceles triangles. Atomistic calculations have been used to determine the core structures of partials and also their separations. The implications of these results are described especially in relation to fracture and current nucleation and growth mechanisms for twins.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Unnamed user with email sms67@eng.cam.ac.uk
Date Deposited: 05 Mar 2014 14:44
Last Modified: 18 Feb 2021 20:14
DOI:

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