STRUCTURE DEFORMATION RELATIONSHIP IN A BETA-METASTABLE TI-ALLOY/

This paper presents the first results of an ongoing research which was set up to investigate the influence of beta-rich microstructures on t he deformation mechanisms of the recently developed beta-Cez alloy. De pending on the heat treatment, strong differences in the mecanical beh aviour of this beta metastable alloy were obtained. They can be explai ned by the relative contribution of slip and formation of stress induc ed martensite during deformation. The relative contribution of the two mechanisms is influenced by the chemical composition of the beta phas e and also by microstructural features. In particular, large beta grai ns are shown to favour the formation of stress induced martensite.