1 Submitted to Materials Science and Engineering A Hydrogen-assisted crack propagation in α-iron during elasto-plastic fracture toughness tests Domas Birenis a , Yuhei Ogawa b,c , Hisao Matsunaga d,e,f , Osamu Takakuwa d,e,g Junichiro Yamabe g,h , Øystein Prytz a , Annett Thøgersen i a Department of Physics, Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1048 - Blindern, NO-0316 Oslo, Norway b Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan c Research Fellow of the Japan Society for the Promotion of Science, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan d Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan e Research Center for Hydrogen Industrial Use and Storage (HYDROGENIUS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan f International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan g AIST-Kyushu University Hydrogen Materials Laboratory (HydroMate), 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan h Department of Mechanical Engineering, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan i SINTEF Materials and Chemistry, PO Box 124 - Blindern, NO-0314 Oslo, Norway Abstract Elasto-plastic fracture toughness tests of a commercially pure iron were performed in air and in hydrogen gas at two different pressures. Some unique characteristics of hydrogen-enhanced cracking were exhibited at both the macroscopic and microscopic length scales, based on the
Hydrogen-assisted crack propagation in α-iron during elasto-plastic fracture toughness tests
May 29, 2023
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