The tensile properties of ordered and disordered Cu3Au single crystals have been investigated. Measurements have been made to determine the influence of initial orientation of the tensile axis and of the domain size on the work hardening characteristics of Cu3Au. It is shown that the work hardening rate of the ordered crystals increases with the domain size and the occurrence of secondary slip. The nature of the effects is discussed in terms of previous results on Ni3Fe. It is concluded that they can be explained by the antiphase boundary tube mechanism.Les proprietes sous tension de monocristaux ordonnes e t desordonnAs de Cu3Au ont At6 Btudiees. Des mesurages ont At6 faits afin de determiner l'influence de l'orientation initiale de l'axe de tension et de la taille des domaines ordonnes sur la vitesse d'bcrouissage du Cu,Au. I1 est dkmontre que la vitesse d'bcrouissage des monocristaux ordonnes augmente avec la taille des domaines e t avec la presence de glissement secondaire. La nature des effects est expliquee en relation avec des rbsultats prealable ssur le Ni,Fe. I1 est conclu que le phknomhe peut stre expliquer avec le mecanisme de production des tubes de front,i&res de domaines antiphases. l ) This work was partially supported by the U.S. Army Research Office.2, Now a t
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