Authors: Provan, J.W.; Bamiro, O.A.

Source: Canadian Metallurgical Quarterly, Number 1, January-March 1974 , pp. 203-210(8)

Publisher: Maney Publishing

Abstract:

Polycrystalline materials are visualized in this paper as a statistical ensemble of microelements whose crystallographic axes are randomly, but not uniform randomly, oriented in the material system. Based on this concept the influence of internal dislocations and grain boundaries on the elastic response of such metals is discussed. The latter influence is taken into consideration by combining the grain boundary coincidence cell models of Bollmann with the relaxation technique of Weins in the case of symmetric tilt boundaries. The micromechanics theory of Axelrad and Provan is also briefly discussed to indicate where these quantitative metallurgical studies are of importance in the further development of this theory.

Résumé

Dans cette étude, les matériaux poly cristallins sont considérés comme un ensemble statistique de micro-éléments dont les axes cristallographiques sont orientés au hasard, mais non uniformément, dans le matériau. A partir de ce concept, les auteurs discutent de l'influence de dislocation et des joints de grains sur la réponse élastique de tels métaux. L'influence des joints de grains est considérée en combinant le modéle des sites en coincidence de Bollmann avec la technique de relaxation de Weins, pour le cas des joints de flexion symétriques. La théorie de la micromécanique de Axelrad et Provan est aussi brièvement discutée pour indiquer quelles sont les études métallurgiques quantitatives nécessaires au développement ultérieur de cette théorie.

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/000844374795595299

Publication date: 1974-01-01

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