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Hydrogen embrittlement behavior of high strength low carbon medium manganese steel under different heat treatments
Affiliation:1. State Key Laboratory of Rolling Technology and Automation, Northeastern University, Shenyang, Liaoning, 110819, China;2. School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning, 110819, China;3. Laboratory for Excellent in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at EI Paso, TX, 79968-0521, USA;1. CIICAp, Autonomous University of Morelos Estate (UAEM), Col. Chamilpa 1001, C.P. 62209, Cuernavaca, Morelos, Mexico;2. Istmo University, Tehuantepec Campus, Santo Domingo, Tehuantepec, C.P. 70760, Mexico;3. Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Circuito de la Investigación Cientifica S/N, Ciudad Universitaria, C.P. 04510, Mexico City, Mexico;4. Institute of Physical Science, National Autonomous University of Mexico (UNAM), Morelos Campus, Col. Chamilpa 1001, C.P. 62209, Cuernavaca, Morelos, Mexico;1. State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Institute of Advanced Steels and Materials, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3. State Key Lab of Development and Application Technology of Automotive Steels, Baosteel Research Institute, Shanghai 201900, China;1. Materials Science and Engineering Research Center, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;2. China Aero-Polytechnology Establishment, Beijing 100028, PR China;1. Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan;2. Elements Strategy Initiative for Structural Materials (ESISM), Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan;3. Department of Mechanical Sciences and Engineering, Chiba Institute of Technology, 2-17-1 Tsudamuma, Narashino, Chiba 275-0016, Japan
Abstract:Hydrogen embrittlement (HE) behavior was investigated in a low carbon medium Mn steel with three different volume fraction of retained austenite (RA), which was obtained after different heat treatments. The hydrogen permeation test showed a higher permeability for directly water quenched specimen compared to quench-tempered specimens. Melt extraction test showed hydrogen concentration increased with hydrogen charging current density in the order of directly quenched specimen, QLA, quenched with low-temperature annealed specimens and QHA quenched with high-temperature annealed specimens. Slow strain-rate tensile test was employed to examine the HE behavior, the HE indices decreased with the increase of RA irrespective of increased hydrogen concentration. HE susceptibility can be suppressed by raising intercritical annealing temperature because Mn enrichment increases the stability of RA.
Keywords:Low carbon medium manganese steel  Retained austenite  Hydrogen embrittlement  Electrochemical hydrogen permeation  Slow strain-rate tensile  Quasi-cleavage
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