簡便な水素環境試験法によるステンレス鋼の低温での特性評価

抄録

Fuel-cell vehicles, one of the applications of hydrogen energy system, are getting into wide use in near future. Structural materials with high strength and less hydrogen embrittlement are required for extending the cruising range and reducing the costs of the vehicle. Hydrogen environment embrittlement has been evaluated usually using a chamber of high pressure hydrogen gas containing a specimen inside and loading from outside. However, this kind of method requires facilities of high pressure hydrogen for mechanical properties testing.
A simple testing method for mechanical properties evaluation under high pressure hydrogen gas was developed without using a high pressure gas chamber and, in this report, this method was applied easily to low temperatures.
Tensile properties of stainless steels, SUS 304, 304L and 316L, obtained by this simple method are in good agreement with previous data obtained in a high pressure chamber, which proves the effectiveness of this simple method.