ベータ型チタン合金の微視破壊挙動の観察

抄録

The purpose of this paper is to investigate the microfracture behavior of beta titanium alloy which is important for its toughening. The initiation and propagation of microfracture were observed by optical microscope, scanning electron microscope and transmission electron microscope. The microfracture propagation were prompted by the microcracks and also the coalescence of microcracks of nanovoids in a ductile fashion. It was observed that microcracks of the beta titanium alloy were occurred by the links of nanocracks. By the observation of microfracture behavior, it could be concluded that the alpha phase played more important role for the microfracture initiation and that the nanocrack initiation were influenced by the crystallographic orientation of alpha phase.