Hydrogen embrittlement evaluation apparatus and hydrogen embrittlement evaluation method

摘要

PROBLEM TO BE SOLVED: To provide a hydrogen brittleness evaluation device and a hydrogen brittleness evaluation method capable of evaluating influence of hydrogen on peel strength of a microstructure interface.SOLUTION: In a hydrogen brittleness evaluation device, a test piece 1 with a micro cantilever beam 10 extended from a fixed end to a free end formed therein has only one microstructure interface which passes between the fixed end and the free end of the micro cantilever beam 10. The microstructure interface is almost perpendicular to a direction that the micro cantilever beam extended from the fixed end to the free end. The hydrogen brittleness evaluation device comprises: an electrolyte tank 2 where the micro cantilever beam 10 with an upper face formed on a top surface 1a of the test piece 1 is immersed in electrolyte 20; a counter electrode 3 which is also immersed in the electrolyte 20; an external power supply 4 which generates a potential difference between the test piece 1 and the counter electrode 3; an indenter 5 which is arranged at a position on the top surface closer to the free end than the microstructure interface and applies a load in a direction almost perpendicular to the top surface; and a measurement section 6 which measures displacement and the load of the indenter 5.SELECTED DRAWING: Figure 1