Effect of pre-strain on hydrogen embrittlement of metastable austenitic stainless steel under different hydrogen conditions |
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| Affiliation: | 1. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2. Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China;3. Hefei General Machinery Research Institute, Hefei 230031, China;1. High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea;2. Department of Advanced Metallic Materials, Korea Institute of Materials Science, Changwon, Gyeongnam, 642-831, Republic of Korea;1. Department of Materials Science and Engineering, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan;2. Department of Materials Science and Engineering, Kyusyu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;2. Department of Mechanical Manufacturing Engineering, Shanxi Engineering Vocational College, Taiyuan 030009, Shanxi, PR China;3. Instrumental Analysis Center, Taiyuan University of Technology, Taiyuan 030600, PR China;4. The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, PR China;5. Taiyuan Iron & Steel Co., Ltd., Taiyuan 030003, PR China;6. College of Materials Science and Engineering, North University of China, Taiyuan 030051, Shanxi, PR China;1. School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, China;2. School of Mechanical and Materials Engineering, Washington State University, Pullman WA 99164, USA;3. School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China;1. School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2. Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China;1. International Research Center for Hydrogen Energy, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan;2. Research Center for Hydrogen Industrial Use and Storage (HYDROGENIUS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan;3. International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan;4. Department of Mechanical Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan |
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| Abstract: | The effects of internal hydrogen and environmental hydrogen on the hydrogen embrittlement of 304 austenitic stainless steels (ASSs) with varying degrees of pre-strain were investigated by a tensile test under cathodic hydrogen-charged, gaseous hydrogen and hydrogen-charged and gaseous hydrogen combined conditions. The internal hydrogen embrittlement of the 304 ASSs increased with increasing pre-strain, while the hydrogen embrittlement caused by the environment hydrogen increased and then decreased with increasing pre-strain. The hydrogen embrittlement mechanisms caused by the internal hydrogen or environmental hydrogen were different. The cracks caused by internal hydrogen or environmental hydrogen are mainly initiated in grain interior or at grain boundary, respectively. Under the coupling condition of internal hydrogen and environmental hydrogen, the hydrogen embrittlement of 304 ASSs was the strongest and increased with increasing pre-strain. Environmental hydrogen was dominant for low levels of pre-deformed specimens. Internal hydrogen was dominant for high levels of pre-deformed specimen. |
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| Keywords: | Austenitic stainless steel Martensite Pre-strain Internal hydrogen Environmental hydrogen Hydrogen embrittlement |
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