| 摘要 |
PROBLEM TO BE SOLVED: To provide a fatigue testing method for a conductive material, in which can be used a fatigue test piece having the average crystal grain diameter adjusted, and having the crystal structure homogenized. ! SOLUTION: A fatigue testing method for a conductive material, includes: a first step of applying plastic deformation in a degree of processing of 1.5 or more to a workpiece 12 made from a conductive material to prepare an original test piece 11 consisting of a crystal structure having an average crystal grain diameter of 50 μm or less; and a second step of applying plastic deformation in a decreased degree of processing of 0.3 or less to the original test piece 11 to maintain the state of the crystal structure formed in the original test piece 11 while preparing a thin plate test piece 10 from the original test piece 11. The prepared thin plate test piece 10 is supported in a cantilever manner and resonated to repeatedly apply bending deformation to the thin plate test piece 10, an |
