| 摘要 |
Provided is a method for evaluating a corrosion fatigue damage wherein a corrosion fatigue damage occurring in various members such as the internal cooling hole of a die is reproduced easily by using a test piece. The method for evaluating a corrosion fatigue damage is carried out in such a manner that a load is applied repeatedly to the surface of a test piece having an internal space into which a corrosive medium is introduced, and the surface and/or the cross-section of the internal space in the load-applied test piece is observed. The method for evaluating a corrosion damage is carried out preferably in such a manner that a test piece, where a space simulating the internal cooling hole of a die is formed in a material piece consisting of the material of the die, and a corrosive medium simulating the cooling medium of the die is introduced into the space, is provided, a load is then applied repeatedly to the surface of the test piece, and the surface and/or the cross-section of the space in the load-applied test piece is observed.
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