1988 年 29 巻 2 号 p. 99-108
For the development of the miniaturized mechanical tests, an attempt has been made to apply a TEM disk 3 mm in diameter to the bulge test, and its feasibility for the neutron-irradiated metals was discussed. The maximum load for the bulge deformation of the disk was well correlated with the tensile strength by one of the two straight lines for each of ductile and less ductile materials, whose tensile elongation limits were larger than 15% and less than 9%, respectively. The maximum bulge depths for the above two specimen groups were in the two narrow ranges from 0.55 to 0.65 mm and 0.8 to 0.9 mm, respectively, depending on the ductility. The present bulge test-tensile test correlation has been confirmed to be also valid for the neutron-irradiated metals.
