Seiji Fukuyama, Lin Zhang, Mao Wen and Kiyoshi Yokogawa
Institute for Structural and Engineering Materials, National Institute of Advanced Industrial Science and Technology (AIST), Kure 737-0197
High-pressure hydrogen storage system is required for fuel cell vehicle. The effect of hydrogen pressure on the behavior of materials needs to be examined. Tensile properties of type 304 stainless steel were measured using a specially designed pressure vessel up to 39.3 MPa. Ultimate tensile strength, elongation and reduction of area of type 304 stainless steel decreased with increasing the hydrogen pressure up to 39.3 MPa. Crack nucleation and growth are considered. The effect of strain-induced martensite on hydrogen embrittlement is discussed.
(Received November 28, 2002)
hydrogen embrittlement, hydrogen environment embrittlement, austenitic stainless steel, sensitization, tensile properties, fracture surfaces, crack growth
Please do not copy without permission.