Abstract
The Herbert hardness tester is a typical pendulum-type hardness tester. Hardness is measured based on the swing angle of the pendulum in relation to the specimen. In the present study, hardness was measured using a Habara-type Herbert pendulum hardness tester with a modified measurement system and a Brinell hardness tester, and we investigated the effect of each condition, such as the indenter radius of the pendulum tester, the swing cycle, and the surface roughness of the specimens. Moreover, we discussed the relationship between damping hardness and conventional Brinell hardness, and the Brinell hardness was found to be obtainable from the damping hardness.
