Abstract
Tensile test of a thin notched plate of titanium was conducted on the stage of an optical microscope and the deformation and fracture behavior was observed in situ during the test. In the present study, the notched specimen was sandwiched by two transparent and colorless plates of polycarbonate, which were called "loading plates," and both ends of the specimen were adhered on the inner surfaces of these loading plates. As there is a large difference in linear expansion coefficient between the specimen of titanium and these loading plates of polycarbonate, tensile load is generated by heating them uniformly. Moreover, strain gage was attached on the side of the loading plate and the tensile load was evaluated by the strain and Young's modulus of polycarbonate. As the proposed method of tensile test for thin plates is very simple and, in principle, it is possible to reduce the size of specimen and loading plates, it might be extended to the tensile test for small thin films.
